The HIMA EABT3 B9302 (part number 997009302) is an I/O Subrack Assembly Kit for the HIQuad (H41q/H51q) safety systems.1
While the B5233-1 (which we discussed earlier) is the Central rack housing the CPUs, the B9302 is the Expansion rack used to house the actual input and output modules that interface with your field devices.
Kit Components
When you order the B9302 assembly, it typically comes pre-configured with:
1 x K 1406 I/O Subrack: A 19-inch, 4 HU (Height Unit) chassis.2
1 x F 7553 Coupling Module: Pre-installed in Slot 17.3 This module manages the connection between this I/O rack and the Central CPU rack.
1 x BV 7032 Flat Cable:4 Used to daisy-chain the I/O bus. The suffix (e.g., B9302-0.5) indicates the cable length in meters.5
Slots 1–16: These are reserved for your specific I/O modules (e.g., Digital Input F3236. Analog Input F6217).6
Slots 18–21: Reserved for optional F 7133 Power Distribution modules (up to 4 can be added).7
Technical Specifications
Maintenance & Diagnostics: The F 7553 Module
Since the F 7553 Coupling Module is the heart of this specific kit, keep an eye on its front panel LEDs:
WD (Green): Indicates the Watchdog signal is present.8 If this is off, the rack’s outputs will likely fail to a safe state (de-energized).
SEL (Yellow): Flashes when the Central Module is actively communicating with (selecting) this specific I/O rack.
WD Switch: There is a shrouded slide switch on the front. This allows you to manually disable the Watchdog signal for this rack during maintenance without tripping the entire system’s Emergency Off (but use this with extreme caution).9
Common Spare Parts for this Rack
F 7133 (981713302): 4-fold power distribution module with fuses.10
F 7546: Bus termination module (required if this is the last rack in the I/O chain).
The F6705 analog output module is a high-performance module specifically designed for safety-critical and industrial automation applications.
It is a HIMax and HIQuad safety system, providing reliable and precise analog signal output for controlling actuators, drivers and process equipment.
Equipped with a powerful security architecture, the F6705 module complies with strict industry standards, making it suitable for environments in the oil and gas, power generation, chemical processing and manufacturing industries.
It ensures high precision, fast response time and fault tolerance, which is conducive to safe and efficient factory operation.
Product specification
Parameter value
Model: HIMA F6705
Module type: Analog output module
Output quantity: 4 analog outputs
Output signal range: 4-20 mA / 0-10V (configurable)
Resolution: 12-bit / 16-bit
Accuracy: ±0.1% of the full scale
The response time is less than 5ms
Programmable power supply 24V DC
Isolation degree 1500V (between channels)
Operating temperature: -20 °C to + 60°C
Storage temperature: -40 °C to + 85°C
Dimensions: 160 x 100 x 30 millimeters
Weight: 0.25 kg
Protection grade IP20
Certificates SIL 3. IEC 61508. ATEX
F6705
Industry application
F6705
Oil and gas industry – for pipeline automation, drilling control and natural gas processing plants.
Electricity – Set points for controlling turbines and generators in thermal power plants, hydropower plants and nuclear power plants.
Chemical processing – Ensure precise chemical dosage and reactor temperature control.
Manufacturing and industrial Automation – Regulating robotic arms, conveyor belts and material handling systems.
Pharmaceutical production – crucial bioreactors, mixing devices and precise dosing systems.
Water treatment plants – for flow control, pH adjustment and stoichiometric systems.
Railways and Transportation – Controlling braking force and traction force in railway automation.
Product advantages
High accuracy and precision – Provide stable and accurate analog output.
Fail-safe design – Complies with SIL 3 safety standards to ensure maximum reliability.
Fast response time – widely applied in the field of real-time process control optimization, it provides an outstanding solution.
Flexible configuration – Supports current and voltage output options.
Advanced isolation – Provides electrical isolation to prevent ground loops and signal interference.
Compact and space-saving – designed for easy integration into HIMA security systems.
Wide operating range – suitable for harsh industrial conditions – wide temperature resistance range.
Seamless integration – Compatible with DCS, PLC and SCADA systems.
The HIMA K9203A (part number 996920360) is an Accessory Rack Fan designed for the forced ventilation of 19-inch rack installations, specifically for HIQuad (H51q) and HIMax safety systems.
While safety controllers process the logic,
the K9203A ensures that the high integration of electronic components does not lead to overheating, which is critical for maintaining the long-term reliability and “SIL” rating of the system.
The axial fans have a calculated lifetime of 62.500 hours (about 7 years) at $40^\circ\text{C}$.
If your system is approaching this age, or if the “Fail” LED is lit, the internal fan motors are likely reaching their end-of-life and the entire K9203A unit should be replaced to prevent safety controller shutdowns due to over-temperature.
The safety-related F31 02 controller is a compact system in a metal housing with 20 digital
inputs and 8 digital outputs.
The controller is available in various model variants for SILworX and ELOP II Factory, see
Table 4.
The device is suitable for mounting in Ex-zone 2. see Chapter 4.1.4.
The device is TÜV-certified for safety-related applications up to SIL 3 (IEC 61508. IEC 61511
and IEC 62061), Cat. 4 and PL e (EN ISO 13849-1) and SIL 4 (EN 50126. EN 50128 and
EN 50129).
Further safety standards, application standards and test standards are specified in the
certificates available on the HIMA website.
Safety Function
The controller is equipped with safety-related digital inputs and outputs.
Safety-Related Digital Inputs
The controller is equipped with 20 digital inputs. The state (HIGH, LOW) of each input is
signaled by an individual LED.
Mechanical contacts without own power supply or signal power source can be connected to the
inputs.
H51q-HS B5233-1 997105233
Potential-free mechanical contacts without own power supply are fed via an internal short
circuit-proof 24 V power source (LS+). Each of them supply a group of 4 mechanical contacts.
Figure 1 shows how the connection is performed.
With signal voltage sources, the corresponding ground must be connected to the input (L-), see
Figure 1.
Reaction in the Event of a Fault
If the device detects a fault on a digital input, the user program processes a low level in
accordance with the de-energized to trip principle.
The device activates the FAULT LED.
In addition to the channel signal value, the user program must also consider the corresponding
error code.
The error code allows the user to configure additional fault reactions in the user program.
Line Control
Line control is used to detect short-circuits or open-circuits and can be configured for the F31
system, e.g., on EMERGENCY STOP inputs complying with Cat. 4 and PL e in accordance with
EN ISO 13849-1.
To this end, connect the digital outputs DO 1 through DO 8 of the system to the digital inputs DI
of the same system as follows:
H51q-HS B5233-1 997105233
The HIMA H51q-HS B5233-1 (part number 997105233) refers to a complete Central Rack Assembly Kit for the HIQuad safety system.
Unlike the individual modules we discussed (the F8621A or F7131), the B5233-1 is the pre-wired subrack and base system that houses these modules to create a high-availability (HS) safety controller.
Core Components of the Assembly Kit
The B5233-1 kit typically includes the following hardware pre-installed in a 5 HU (Height Unit), 19-inch rack:
1 x K 1412B Central Rack: The physical chassis and backplane (Z 1001).
2 x F 8650 Central Modules (CU): These work in a redundant, clock-synchronized configuration to provide SIL 3 safety.
3 x F 7126 Power Supply Modules: These convert $24\text{ V DC}$ to the $5\text{ V DC}$ needed for the system’s logic. They are wired in parallel for redundancy.
1 x F 7131 Power Supply Monitoring Module: (As discussed previously) This monitors the health of the $5\text{ V}$ rail and manages the backup batteries.
2 x F 7546 Bus Termination Modules: Required for proper signal integrity on the communication bus.
3 x Z 6011/Z 6012/Z 6013 Modules: These are rear-mounted modules for fan monitoring, decoupling, and fusing of the watchdog (WD) signals.
Key Specifications
Feature
Details
Safety Level
Up to SIL 3 (IEC 61508)
Redundancy
High Availability (HS) – Dual processors running in parallel
Bus Type
Single-channel I/O bus (B5233-1 specific)
Cooling
3 integrated fan modules with speed monitoring
Dimensions
Standard 19″ width, $220\text{ mm}$ depth, $5\text{ HU}$ height
The Difference: B5233-1 vs. B5233-2
When working with these systems, it is vital to note the bus configuration:
B5233-1 (HS): Features a single-channel bus with redundant central modules.
B5233-2 (HRS): Features a redundant bus and redundant central modules for even higher fault tolerance.
The HIMA F8621A (part number 984862160) is a Coprocessor Module (often referred to as a Communication or CPU Module) designed for use in HIMA H51q (HIQuad) safety systems.
It functions as a secondary processing unit to offload tasks from the central module, specifically handling intensive communication protocols and data processing to maintain high system performance in SIL 3 safety environments.
Core Technical Specifications
Feature
Details
Processor
HD 64180 Microprocessor
Clock Frequency
$10\text{ MHz}$
Memory
$384\text{ kB}$ total (Static CMOS-RAM and EPROM)
Communication
2 x RS-485 interfaces (Half-duplex, galvanically isolated)
Baud Rates
Software-configurable: $300$ to $57,600\text{ bps}$
Dual-Port RAM: Includes a dedicated Dual-Port RAM area which allows for extremely fast data exchange with the second central module in redundant configurations.
Battery Buffering: The RAM is buffered against power loss via the F7131 module (which we discussed earlier), ensuring that critical project data and variables are not lost during a system restart.
F8621A
Isolation: The RS-485 interfaces feature galvanic isolation, protecting the internal electronics of the module from electrical noise or surges originating in the field wiring.
Safety Integration: Fully compatible with the SILworX programming tool for configuration and validation within a safety loop.
Comparison: F8621 vs. F8621A
F8621A
The “A” suffix in F8621A usually denotes a hardware revision or a specific firmware capability update over the original F8621.
In most legacy H51q systems, the F8621A is a drop-in replacement for older versions, though you should always verify the firmware compatibility with your existing Central Module (e.g., F8650).
Maintenance Note
If you are replacing this module, remember that the communication parameters (like Station ID and Baud Rate) are often defined by S1–S4 DIP switch settings or within the system software. Be sure to document the switch positions on the old module before removing it.
The HIMA F7131 (part number 981713102) is a Power Supply Monitoring Module used specifically within the PES H51q (HIQuad) safety systems.
Its primary job is to ensure that the $5\text{ V DC}$ system voltage—generated by up to three power supply modules—remains stable and within safety limits.
It also manages the backup batteries that keep the system’s memory (SRAM) alive during power losses.
Technical Specifications
F7131
Feature
Details
Primary Function
Monitoring up to three $5\text{ V DC}$ power supplies
Compatibility
HIMA H51q systems (works with F 8650 / F 8651 CPUs)
Space Requirement
4 units of width (4 TE)
Power Consumption
$5\text{ V DC}$ at $25\text{ mA}$; $24\text{ V DC}$ at $20\text{ mA}$
Battery Type
CR-1/2 AA-CB (HIMA Part No. 44 0000016)
Indicators
3 Front-facing LEDs for voltage status
Key Features & Maintenance
Voltage Monitoring: The module provides three “test bits” to the central modules.
This allows the safety program to trigger an alarm or a controlled shutdown if one of the power supply units fails.
Extended Monitoring: It can also monitor additional power supplies (like the B 9361 assembly kit) via three $24\text{ V}$ outputs (PS1 to PS3).
Battery Management: The internal buffer batteries are critical for data retention.
Lifetime: Approximately 1.000 days at $25^\circ\text{C}$ (unpowered).
Recommendation: HIMA recommends replacing the batteries every 4 to 6 years, even if the system is constantly powered, to prevent leakage or sudden failure during a blackout.
Troubleshooting Tips
F7131
LEDs Off: If the front LEDs are not lit, check the incoming $5\text{ V}$ supply from the power modules or ensure the F7131 is properly seated in the rack.
Battery Faults: If your CPU reports a “Battery Low” or “SRAM Error,” the F7131 is the first place to look. Ensure the batteries are fresh and the contacts are clean
HIMA ELOPII is a high-performance industrial controller module, suitable for use in automation control systems.
It can provide stable and reliable signal processing capabilities and is widely applied in manufacturing, energy industries, and various industrial automation scenarios.
Brand :HIMA
Model :ELOPII
Material Code :H51q-HS B5233-1997105233
Certified product: Yes
Series :ELOPII
Working voltage :220V
Output frequency :30kHz
HIMA ELOPII is a high-performance industrial controller made in Germany. Its outstanding design makes it stand out in the field of industrial automation control.
Adopting advanced microprocessor technology, ELOPII can achieve efficient data processing and precise control operations.
This controller supports custom processing to meet the specific needs of different customers.
The product is made of high-quality materials, ensuring its stable operation in harsh environments.
The ELOPII controller has wide applicability and can be applied in numerous industrial fields such as petroleum, chemical engineering, and power.
It is an ideal choice for achieving efficient and reliable industrial automation control.
The installation is simple and convenient.
Users can complete the installation and commissioning of the equipment through simple steps and put it into operation quickly. Meanwhile, HIMA ELOPII also provides detailed technical support and after-sales service to ensure that every user can have the best usage experience.
