Tag: Honeywell

05701-A-0284  Honeywell  Catalytic Sensor Drive

Description

The Honeywell 05701-to-0284 is a Catalytic Sensor Drive module used in various Honeywell gas detection systems. This component is critical for powering and controlling catalytic sensors, which detect combustible gases such as methane, propane, and butane.

Key Specifications and Features:

Compatibility: Designed for use with Honeywell’s 5701 series gas detectors.

Function: Provides power and control signals to catalytic sensors.

Reliability: Engineered to perform reliably in harsh environments.

Easy Installation: Simple plug-and-play setup ensures quick integration.

Separately Powered Detectors

Separately powered detectors (e.g. most IR, UV/IR Flame detectors) require three or four

wire connections. The detector documentation will indicate the 0V and +24V power

connections and the positive and negative loop connections. When using flame detectors it

is common practice to use only one detector per loop input.

At the System 57 end of the field cables the two detector signal wires should be connected

to the appropriate channels IN+ and IN- terminals of the Hex Relay Interface Card that is

attached to the required 5704F Control Card. The loop current always flows from the IN+

terminal and returns via the IN- terminal.

The power for the detector may be sourced from the System 57 power supply or a separate

field supply, whichever is most appropriate. In small systems, power can be obtained from

terminals 35 and 36 of the Hex Relay Interface Card, but care must be taken not to exceed

the maximum backplane current loading of 8A. A separate dc power distribution block is

recommended.

For fault monitoring purposes, an end of line (EOL) resistor must be fitted in or after the last

detector on the loop. The typical value for end of line resistance is 5.1k ohms.

The detector cable screen, or steel wire armour or braid as appropriate, should be

connected to the system protective earth. This can be achieved where the cable enters the

screen

cabinet by using a metal cable gland, or by other suitable means, and avoiding any

tails within the cabinet.

Where the cable consists of a separate screen sheath and wire armour or braid, the armour

should be connected at

the cabinet entry to the protective earth and the screen sheath

should be connected to the GROUND terminal of the Hex Relay Interface Card or to a

suitable instrument earth point.

Typical Loop Powered Detector Connections

Loop powered detectors (e.g. most smoke, heat and manual call points) have two wire

connection. The detector documentation will indicate the positive and negative loop

connections. Multiple detectors may be connected in parallel on a single loop input provided

the loop operational limit for quiescent current is not exceeded.

At the System 57 end of the field cables, the two detector wires should be connected to the

appropriate channels IN+ and IN- terminals of the Hex Relay Interface Card that is attached

to the required 5704F Control Card. The loop current always flows from the IN+ terminal and

returns via the IN- terminal.

For fault monitoring purposes an end of line (EOL) resistor must be fitted in or after the last

detector on the loop. The typical value for end of line resistance is 5.1k ohms.

The detector cable screen, or steel wire armour or braid as appropriate, should be

connected to the system protective earth. This can be achieved where the cable enters the

cabinet by using a metal cable gland, or by other suitable means, and avoiding any screen

tails within the cabinet. Where the cable consists of a separate screen sheath and wire

armour or braid, the armour should be connected at the cabinet entry to the protective earth

and the screen sheath should be connected to the GROUND terminal of the Hex Relay

Interface Card or to a suitable instrument earth point.

Typical Loop Powered Detector with IS Barrier Connections

Loop powered intrinsically safe detectors (e.g. most smoke, heat and manual call points)

have two wire connection. The detector documentation will indicate the positive and negative

loop connections. Multiple detectors may be connected in parallel on a single loop input

provided the IS criteria and loop operational limit for quiescent current are not exceeded.

In the safe area, the two wires from the detector should be connected to the field (hazardous

area) side of the barrier. The input (safe area) side wires from the barrier should be

connected to the appropriate channels IN+ and IN- terminals of the Hex Relay Interface

Card that is attached to the required 5704F Control Card. The loop current always flows from

the IN+ terminal and returns via the IN- terminal. The barrier must be earthed appropriately.

For fault monitoring purposes an end of line (EOL) resistor must be fitted in or after the last

detector on the loop. The typical value for end of line resistance is 5.1k ohms.

When using an external barrier the IS compatibility link for the input must be set

appropriately. Intrinsically safe systems must be earthed at one point only. All detector cable

screens should be connected separately to the IS safety ground.

Honeywell O5701-A-0351 is a gas detector Control Card for industrial safety monitoring systems, belonging to the highly regarded Signalpoint or System 57 control system series.

This component is very common in petroleum, chemical and semiconductor factories, mainly used to receive signals from remote sensors and drive alarm devices.

Core parameters and functions of the product

Full model name: Honeywell O5701-A-0351 (abbreviated as 5701 Control Module in some documents)

Type: Single Channel Control Card.

Input signal: * Receives 4-20mA standard industrial signals from gas detectors (such as catalytic combustion type, electrochemical type or infrared detector).

It can also support mV bridge circuit signals (for certain specific catalytic combustion probes).

The display interface: The front of the module is equipped with a 3-digit digital liquid crystal display (LCD), which can display the gas concentration, fault code and alarm status in real time.

Output control: It is equipped with multi-level relay output (typically: low alarm A1. high alarm A2. Fault), which is used to interlock sound and light alarms or shut-off valves.

1. Physical Structure and panel description

This card adopts a plug-and-pull design and is usually installed in a 5701 Rack.

LED indicator light

AL1/AL2 (red) : Concentration exceeds the set threshold.

Fault (yellow) : Detector disconnection, short circuit or internal fault of the module.

Inh (amber) : Maintains the inhibited state (Inhibit).

Key operation: There are usually hidden keys at the bottom of the panel, which are used to Reset the alarm or enter the menu for zero point/range calibration.

2. Core technical features

Flexibility: Supports software programming and setting of parameters such as alarm points, lag amounts, and delay times.

Stability: Industrial-grade isolation design, strong resistance to electromagnetic interference (EMC).

Compatibility: It is compatible with Sensepoint, Searchline Excel under Honeywell and most third-party 4-20mA transmitters.

3. Common Application Scenarios

Combustible gas monitoring: Monitoring the leakage of methane, hydrogen or liquefied gas in the environment.

Toxic gas monitoring: Monitor low-concentration toxic gases such as carbon monoxide and hydrogen sulfide.

Hypoxia monitoring: Online monitoring of oxygen concentration in industrial sites.

5704 Gas Card and Catalytic Type Detector

Catalytic detectors require a three wire connection and the detector documentation will

indicate three connections S, 01 and NS, which are usually brown, white and blue

respectively.   At the System 57 end of the field cable, the three detector wires should each be

connected to the respective matching S, 01 or NS terminal of the appropriate channel on the

Quad Relay Interface Card that is attached to the required Four Channel Control Card.

5704 Gas Card and 2 Wire Loop Powered Detectors

Loop powered detectors require a two wire connection and the documentation will indicate

the positive and negative loop connections, usually brown and blue respectively.

At the System 57 end of the field cable the two detector wires should be connected to the S

(positive) and 01 (negative) terminals of the appropriate channel on the Quad Relay

Interface Card that is attached to the required Four Channel Control Card.

5704 Gas Card and 3 Wire 4-20mA Transmitter

ctor documentation

Transmitters require either three or four wire connections and the dete

will indicate the 0V and +24V power connections and the positive and negative loop

connections. At the System 57 end of the field cable the detector loop signal wires sh

connected to the S, 01. NS terminals on the Quad Relay Interface Card that is attached to

the required Four Channel Control Card. The exact terminals used vary depending upon

whether three or four wire topology is used, the requirement for a loop current source

configuration and the channel to be connected to. The transmitter power connection +2

and 0V should be connected to a suitable dc supply.

ould be

4V

ote: Terminals 35 and 36 on the Relay Interface Card are input terminals only and cannot

N

be used to power the transmitter.

he Schematic below details the connections for 3 wire current source transmitters. For

T

other schematics (including isolated and barrier) refer to operating manual 05704-M-5001

5704 Fire Card

The 5704F fire input circuit operates from the system dc input supply (21 to 32V) but has a

built-in voltage limiter that limits the maximum loop voltage to +24V to protect the detectors

from damage. When the system supply is less than +24V the limiter has no effect and the

loop will see the true input supply voltage. The loop current is determined by measuring the

voltage across a 220 ohm current sense resistance. A link selectable 330 ohm barrier

equivalent resistance is incorporated for use when an external IS barrier is NOT fitted. For

fault monitoring purposes, an end of line (EOL) resistor must be fitted in or after the last

detector on the loop. The typical value for the end of line resistance is 5.1k ohms although

this may need to be reduced when many detectors are fitted onto the loop.

An equivalent circuit of one fire input together with an example detector connection is shown

below:-

Line Resistance

Detectors should be located such that the line resistance of the cable required does not

prevent correct operation. As a general guide and for a typical installation of twenty low

quiescent current detectors, the loop cable resistance should be kept below 100 ohms total

(50 ohms per core). The table below gives a quick guide to the maximum cable lengths

permitted in this case:

Interface Card Connections

System 57 interface cards use a common card with differing numbers of terminal blocks

fitted according to which type of card it is. The picture below illustrates a card with the

maximum number of terminals fitted. The tables show the terminal connections for 5701.

5704 gas and 5704 fire interface cards.

8 Detector Connections

The following sections show generic installation schematics for the most common types of

fire or gas detector and System 57.

8.1 Cable Earthing/Grounding

The detector cable screen or steel wire armour (or braid), as appropriate, should be

connected to the system (protective) earth. This can be achieved where the cable enters the

cabinet by using a metal cable gland, or by other suitable means, and avoiding any screen

‘tails’ within the cabinet.

Where the cable consists of a separate screen sheath and wire armour (or braid), the

armour should be connected, at the cabinet entry, to the protective earth and the screen

sheath should be connected to the GROUND terminal of the Field Interface/Relay Card or to

a suitable instrument earth point.

Note: Where a detector is earthed locally, either to the Earth Stud or through the detector

casing or mounting, to avoid earth loops the screen sheath of the cable should only be

connected at one end, i.e., at the detector or at the Interface/Relay Card.

8.2 5701 Gas Card and Catalytic Type Detector

Catalytic detectors require a three wire connection and the detector documentation will

indicate three connections S, 01 and NS, which are usually brown, white and blue

respectively. At the System 57 end of the field cable, the three detector wires should each be

connected to the respective matching S, 01 or NS terminal on the Field Interface or Relay

Card that is attached to the required Single Channel Display Card.

5701 Gas Card and 2 Wire Loop Powered Detectors

Loop powered detectors require a two wire connection and the detector documentation will

indicate the positive and negative loop connections, usually brown and blue respectively.

At the System 57 end of the field cable the two detector wires should each be connected to

one of either the S, 01 or NS terminals on the Field Interface or Relay Card that is attached

to the required Single Channel Display Card. The two terminals used will vary depending

upon whether the location of the measuring resistance is in the loop supply or return paths.

Transmitters powered from the 5701 Control Card require either three or four wire

connections and the detector documentation will indicate the 0V and +24V power

connections and the positive and negative loop connections.

At the System 57 end of the field cable the detector wires should be connected to the S, 01.

NS, 0V or 24V terminals on the Field Interface or Relay Card that is attached to the required

Single Channel Display Card. The exact terminals used vary depending upon whether three

or four wire topology is used, and the requirement for loop current source or sink

configuration. The Schematics below detail the connections for 3 wire current sink or source

transmitters. For other schematics (including isolated and barrier) refer to operating manual

05701-M-5001.

3.5 Engineering Card

The System 57 engineering card provides full maintenance and set up facilities for each

channel card. The front panel has a series of tactile feedback push buttons that allows

checks of the alarm levels and performance to be carried out for each channel. A real-time

‘on board’ clock provides calibration history and calibration overdue reminder functions. An

access key provides security protection.

The engineering card can be fitted with optional modules for extended system options.

3.5.1 Serial Communications Module

The serial communications module provides a gateway between the System 57 rack and a

remote device (DCS, PLC or SCADA package) to allow the continuous monitoring of each

channel’s operation and condition as well as allowing remote configuration of the system

operation. The module uses the industry standard MODBUS RTU protocol, RS485/422/232

standard. Custom designed SCADA graphics packages are also available.

3.5.2 RS232 Printer Driver Module

The printer driver module provides a serial output in the event of a gas alarm, fault or user

intervention. The output is RS232 ASCII event data, has selectable print criteria, provides

time and date stamping and is electrically isolated.

3.5.3 Master Alarm Update Module

The alarm update module provides a common alarm indication with new alarm event update.

It also provides 2 Outputs: 1 relay, 1 Darlington, with selectable operation: pulsed or

continuous and an alarm and common alarm reset input. It complies with ISA ‘M’, DIN 19

235. It can be used with the optional master alarm update panel.

3.6 Interface Cards

There are 9 versions of interface card available (5 for 5701 Gas, 2 for 5704 Gas and 2 for

5704 Fire Control Cards). The interface cards provide the link between the various fire or

gas detectors and the control cards. They provide detector interface, offer flexible relay

options, and allow an individual control card power option. A high integrity relay operation

version is also available. The terminals accept ≤ 2.5mm2 (14AWG) gauge cable.

3.7 Rack Assemblies

System 57 racking units provide mounting options for the system 57 control cards and

interface cards. The racks are available complete with a DC input card and an engineering

card. The racks are 3U high, with front or rear wiring options. Half and full 19″ versions are

available accommodating up to a maximum of 64 channels of gas detection or 60 channels

of fire detection in a single rack, or a combination of both.

3.8 Cabinet Assemblies

The System 57 cabinets provide a convenient and compact mounting of the rack assemblies

and PSUs. They are wall mounting and available in half and full 19″ versions. The cabinets

have an IP54/Nema 12 ingress protection rating, pre-formed bottom-entry knock-out gland

entries and an accessory mounting plate.

3.9 DC Input Card

The DC input card is connected directly to the engineering card and provides the connection

point for power supplied to the whole rack. The field wiring from the engineering card is also

on this card. It provides a common power supply wiring point, reverse polarity and short

circuit protection and multi-supply input capability.

6 Detector Installation

Cabinet outline dimensions

Always install the detectors in accordance with the Detector Operating Instructions. In

general, detectors for lighter than air gasses should be located at a high level and detectors

for heavier than air gasses should be located at a low level.

Do not install the detectors:

a. Where the normal air flow may be impeded.

b. In corners of rooms where static air pockets may exist.

c. Near sources of heat such as convector heaters.

Do install the detectors:

a. As close as possible to the potential source of gas to be detected in order to give the

maximum possible warning.

b. So that they are accessible for maintenance work.

05701-A-0329 by Honeywell | 3-Channel DPCO Relay Card Module

Manufacturer: Honeywell

Part Number: 05701-A-0329

Product Type: 3-Channel DPCO Relay Card Module

Product Overview

The Honeywell 05701-A-0329 is a rugged Triple DPCO (Double Pole Change Over) Relay Card engineered as part of the System 57 series.   It supports three independent relay channels, each equipped with dual Form C (SPDT) contacts, allowing versatile alarm, fault, inhibit, or general-purpose signaling.

Its 3U rack-mount form factor fits standard 19-inch enclosures, enabling straightforward integration into industrial safety and automation panels.   The LED status indicators on each channel provide clear real-time feedback, reducing troubleshooting time and ensuring operational transparency.

Built for harsh industrial environments, the 05701-A-0329 combines high durability, stable performance, and CE-certified compliance, making it ideal for gas detection platforms and other mission-critical systems.

Technical Specifications

Specification    Details

Manufacturer    Honeywell

Model Number    05701-A-0329

Type    Triple DPCO (Double Pole Change Over) Relay Card

Relay Channels    3 independent channels

Relay Contacts per Channel    2 × Form C (SPDT) relays

Relay Functions    Alarm, fault, inhibit, or general-purpose switching

Status Indicators    LED indicators for each channel

Form Factor    3U module for standard 19-inch rack mounting

Environmental Ratings    Resistant to vibration, dust, and temperature extremes

System Compatibility    Designed for Honeywell System 57 gas detection units

Compliance    CE marked;   meets Honeywell safety and EMC standards

Shipping Weight    2.5 kg

Rack Options

Racks are available in 4-slot, 8-slot, and 12-Slot versions. Racks are interchangeable between the Controller rack

and an I/O expansion rack, and all three versions shown in the following figure are available for either purpose.

8 and 12 slot I/O racks can be modified with additional slots for optional Reserve Power Supply and Power Status

Module.

Note: You can install redundant power on any 8 or 12 slot I/O rack.

Power Supply

The P01 Power Supply, shown in Figure 10. provides 5 Vdc and 24 Vdc to the backplane connectors in the local and

remote racks.  Power Supply is used in each Controller Rack, I/O expansion racks and for all rack versions (4-slot,

8-slot, and 12-Slot).

The lower capacity P02 power supply is available for reduced I/O applications and for Redundant Controller rack

power.

P24 power supply provides 5VDC and 24VDC to satisfy the power requirements of a single controller with I/O, a

Remote I/O rack or a Redundant C75 CPU.  The 60 watt capacity requires minimal de-rating of the available HC900

I/O modules.

A tool-secured door covers the voltage connections.  An internal non-replaceable fuse limits supply current under

certain fault conditions.

Each power supply includes an internal 5.0-amp fuse that

is not field-replaceable.  (An external fuse may be added

by the user. See page 25)

Items shown with key numbers:

1.  Voltage test points (P01model only)

2.  AC/DC Input terminal block

3.  Wiring label

4.  Grounding lug (Reference; lug is not part of Power

Supply; it is staked to bottom of Rack.)

The HC900-expansion I/O link is a private network and the switch used for the interconnection of the

HC900 Processor and Scanners must not be connected to any other LAN or WAN.  Likewise, no devices

other than the HC900 components should be connected to the I/O link Switch.  Failure to comply will

cause communication failures on the I/O link causing I/O modules to go in and out of their failsafe

settings.

Note: The HC900 is equipped with an Ethernet port as a standard feature (two Ethernet ports on the C70

& C75 CPU). These ports can function simultaneously as slave and master communications ports.

The dual Ethernet ports (C70 & C75 CPU’s) can be configured for redundant operation to a host.

If the host device does not have the inherent capability to recognize a network failover, the

Honeywell HWIOPC Server would be used to perform this functionality.

The dual Ethernet ports will not operate in a redundant configuration through a gateway to a

Host / server on another subnet. While both the E1 & E2 Ethernet can be configured with a default

Gateway address, only the E1 port will actually communicate across a gateway to another subnet

Hardware Components

This section contains general descriptions of each of the major components of the HC900 system.

For environmental specifications, refer to the section on Pre-Installation Planning.

HC900 Controller Rack

An HC900 Controller (“local rack”) is shown in the following figure. As indicated in this figure, the Controller Rack

includes:

1.  Rack, available in 4- 8-, or 12-slot versions

2.  Power Supply

3.  Controller Module

4.  Grounding bars (for I/O wiring; optional)

5.  Input/Output modules.

6.  I/O Terminal Blocks

HC900 Redundant Controller Rack

A HC900 Redundant Controller is shown in the following figure.

Rack

Redundancy Switch Module (RSM) . Interface between Lead/Reserve controllers.

Lead/Reserve controllers. Two C75 CPUs, designated “CPU-A” (left), “CPU-B” (right).

Two 900P01-xxxx or 900P02-xxxx Power Supplies

I/O Expansion Rack

I/O expansion (“remote”) racks, shown in Figure 8. are available to accommodate additional input/output modules,

and/or to enable location of I/O modules close to the process and remote from the controller. For C75/C75S, all I/O

is in a rack or racks separate from the controller rack.

Scanner type must match controller type. i.e. example S50S may only be used with C50S, or C70S.  S50S cannot be

used with a C50 or C70.

An I/O expansion rack includes:

1. Rack, available in 4- 8-, or 12-slot versions

2. Power Supply

3. Scanner 1 Module (S50/S50S) (shown) or Scanner 2 Module (S75/S75S)

4. Grounding bars (for I/O wiring; optional; required for

safety applications)

5. Input/Output modules

6. I/O Terminal Blocks

7. Power Status Module (PSM)

(req’d if using Reserve Power Supply)

8. Reserve Power Supply (optional). Available in 8- or 12

slot racks.

05701-A-0326  Honeywell System 57 Gas Detector Interface Card

Manufacturer: Honeywell

Part Number: 05701-A-0326

Product Type: System 57 Gas Detector Interface Card

Product Overview

The Honeywell 05701-A-0326 is a robust Field Interface Card engineered for Honeywell System 57 gas detection platforms.

It plays a vital role by connecting field-mounted detectors to the system’s controller, delivering amplified signals and reliable data transmission for continuous gas monitoring.

Its rugged construction and compact design allow smooth installation in challenging industrial environments where precise detection is critical.

Technical Specifications

Specification    Details

Model Number    05701-A-0326

Type    Pulse Preamplifier Controller / Field Interface Card

Input Voltage    9 – 32 VDC

Output Voltage    0 – 5 VDC

Functionality    Dedicated to receiving and amplifying signals from gas detectors

Relay Outputs    None – optimized for systems without relay requirements

Dimensions    16 cm × 10.9 cm × 4.3 cm

Weight    0.20 lbs (0.09 kg)

Compatibility    Fully integrates with Honeywell System 57 gas detection networks

Construction Features    Rugged enclosure designed for harsh industrial use

Ethernet 10/100 Base-T connection:

05701-A-0326

Port(s) configured to Auto Negotiate – default to half duplex

C30/C30S controller up to 5 PC hosts via Modbus/TCP protocol.   C50/C50S, C70/C70S and

C70R Legacy and C75/C75S (new model) support up to 10 PC hosts via Modbus/TCP protocol.

Peer-to Peer (UDP) communication with up to 32 other HC900 Controllers.

C70/C70S and C70R Legacy and C75/C75S (new model) have 2 Ethernet ports for connection to

up to 10 PC hosts.   They also support Modbus/TCP Initiator function over both ports and

automatically switch between ports to maintain Peer to Peer communications with other

C70/C70S or C70R/C75/C75S redundant CPUs.

05701-A-0326

Private Ethernet 100 base T connection to I/O expansion racks: (except C30 and C30S CPU)

Direct connection to each C70R Legacy and C75/C75S (new model) CPU.

Overview

This section provides a description of each of the major components that can be included in an HC900 Controller

physical configuration, and indicates some of the methods by which they can be combined.

Components

The Honeywell HC900 Process Controller includes a set of hardware modules that can be combined and configured

as required for a wide range of small to medium process control applications.

Some of the modules are required in all configurations.   Others are optional;  they are selected as appropriate to

provide optional functions and/or to “size” the system, either in initial planning, or in modifying and/or expanding

the system to meet changing requirements.

DI IOP Digital Input 32ch

The Honeywell 51304485-100 IOP and its compatible DI FTA can accommodates 32 contact inputs that share an isolated common return.

The 240 Vac Digital Input (DI) FTA is similar to the 120 Vac Digital Input FTA, except it accommodates a higher operating voltage, a lower sense current,

and the inputs of all 240 Vac DI FTA models are arranged in groups of eight channels, each with a common return for the group.

Digital Input IOP MU-PDIX02

CE-compliant, Non-Conformal Coated

Redundancy not supported

Input Channels: 32

Input Range:

w/24 Vdc FTA: 20-30 Vdc

w/120 Vac FTA: 90-132 Vac rms

w/240 Vac FTA: 180-264 Vac rms

Feature Summary

Hardware

51304485-100

Modular rack structure; components are ordered individually as needed

CPU with Ethernet and isolated RS485 communications

Easy to assemble, modify, and expand

C30 and C30S controllers provide local I/O connections while C50/C70 and C50S/C70S Controllers provide for

remote input/output rack connections over a private Ethernet-linked network

Parallel processing – a microprocessor in each I/O module performs signal processing, to preserve update rates

Power supplies – provide power to CPU rack and Scanner I/O racks

Redundancy

51304485-100

Redundant C75 CPU

Redundancy Switch Module (RSM) – required between redundant CPUs

Redundant Power Supply – provides redundant power to any CPU rack or Scanner2 I/O rack

Power Status Module (PSM) – required when using a second power supply in Scanner2 I/O rack

Communications

All CPUs (except where noted):

Serial Ports:

Legacy

Two serial ports, configurable for RS-232 or galvanically isolated RS-485 communications.

RS232 port can be used for link to PC for 900 Designer configuration tool (up to 50ft/12.7 Meters)

or via modem.  Also can be configured for Modbus RTU, master or slave.

RS 485 port used for 2 wire link to legacy operator interface (ELN protocol) or can be configured

for Modbus RTU, master or slave communications (up to 2000 Ft /600 Meters).

New Controllers

Two isolated RS 485 communications ports

USB to RS485 cable must be obtained to support link to PC for 900 Designer configuration tool

Can be configured for Modbus RTU, master or slave communications (up to 2000 Ft /600 Meters)