IS420UCSBH3A controller is a version of General Electric (GE)Mark VIe series UCSB controller, which is mainly used in the management system and control system of automatic drive components of gas, steam and wind turbines. This series of controllers is a significant improvement of Mark V series, especially in functional application, which is more suitable for gas and steam automatic drive components.
Hardware specifications and characteristics
The core hardware of IS420UCSBH3A controller includes a 1200 MHz EP80579 Intel microprocessor, which runs on QNX real-time operating system and has high reliability and real-time. The modular design of the controller is compact, and it supports various communication interfaces, such as onboard I/O network (IONet) interface, for high-speed data transmission with I/O modules. In addition, it is equipped with 256 MB SDRAM memory, which can meet the needs of complex industrial applications.

In appearance design, there are several LED indicators on the front panel of IS420UCSBH3A controller, which are used to display the state of the controller. For example:

Amber LED indicates that the internal component exceeds the recommended limit;
A steady green LED indicates that the controller is online and running application code;
Other LED indicators are used to display the recovery process status, power status, etc.
The modular design of the controller allows flexible configuration, and has the characteristics of fanless design and built-in power supply, so that it can run stably in harsh environment.
technical superiority

Specifications 
 Mounting Format DIN Rail Network Interfaces PROFINET Modbus/TCP Gateways / Bridges HART Network Redundancy MRP Dual LAN System Redundancy PNSR or Modbus/TCP I/O Redundancy Dual Media Support Copper & MM Fiber Media Connector 2x RJ45 or 2x SFP I/O Types 24 VDC, 115/230 VAC in 2-60 VDC, 20 – 265 VAC out Analog, RTD, Thermocouple Specialty Modules Pulse Test (24 VDC) Pulse Input Sequence of Events (SoE) Inputs ASH Detector Isolation Galvanic Isolation DI, DO, AI, AO
PAC8000 Remote I/O
Hot Swap Yes Environmentals IP20 -40˚C to 70˚C Conformal Coat ISA Level G3 corrosion 30g shock 5g vibration
Agency Approvals UL UL HAZLOC C1D1 CE ATEX Zone 1 Intrinsically Safe Marine Lloyd’s Register
I/O Family Comparison

PACSystems RSTi

PACSystems RSTi-EP
VersaMa
RSTi-OM
PAC8000
PACSystems

PAC8000 Remote I/O The Control Solution for Process Industries 
 Introduction 
 PAC8000 Remote I/O is a completely modular I/O solution   for both general purpose and hazardous area applications. Based upon a carrier system, PAC8000 supports a wide range of modules and I/O functions, including intrinsic safety signals. An open architecture allows communication with a variety of different fieldbuses by selecting the appropriate type of Bus Interface Module (BIM). Designed to resist extreme temperatures, humidity, corrosive materials, shocks, and  vibration, PAC8000 delivers full specification performance in even the harshest environments. In ATEX environments PAC8000 excels –   all  components can be mounted and live worked in   Zone 2 / Division 2 and ATEX Zone 1 hazardous areas.   The I/O includes types that can be  connected directly to intrinsically safe (Exi) or increased safety (Exe) field wiring. PAC8000 Remote I/O integrates seamlessly with PACSystems solutions and is connected via  PROFINET or Modbus TCP to RX3i and RSTi-EP controllers.
Harsh & Hazardous Area Operation 
 PAC8000 can go where other products cannot. They can be f ield mounted and subjected to the following:-40°C to +70°C operating range ISA Level G3 corrosion 30g shocks and 5g vibration Operation in Class I, Division 2 and Zone 2 hazardous areas with I/O module field wiring including intrinsically safe (Exi) and increased safety (Exe) options Supports UL HAZLOC C1D1 and ATEX Zone 1 hazardous areas with I/O module field wiring including intrinsically safe (Exi) and increased safety (Exe) options
High Availability 
 PAC8000 supports PROFINET System Redundancy (PNSR),   enabling synchronized independent controllers to service   the I/O and transition from active to back-up controller   without interruption. With controllers separated up to   10 kilometers from each other, processes will be resilient   from physical disruption. Consider unplanned downtime   a thing of the past.
Variety of I/O Modules
Beyond just analog and digital I/O, a broad

DESCRIPTION 
 The 750 and 760 relays contain many features designed to accommodate a wide range of applications. This chapter is pro vided to guide you, the first time user, through a real-world application. The following step-by-step installation example, pro vides you with a quick and convenient way of becoming familiar with the relay. To start, simply power on the unit, and follow the instructions in this tutorial. The example assumes the following system characteristics. It also assumes that relay set points are unaltered from their factory default values.

• Power System Data System: 3Φ, 4 wire Frequency: 60 Hz Line Voltage: 13.8 kV Maximum Current: 600 A
• Control System Requirements All protection elements used are to trip the breaker. Breaker position monitoring via 52b contact only. Only current metering is required. Contact Inputs: Remote open and close contacts from RTU. Remote/local selection from panel hand switch. Reset from RTU. Alarm after 100 second delay from substation monitor Contact Outputs: Trip and close to breaker control circuit (trip and close relays). Relay failure alarm to RTU (self-test warning relay, no programming required). Alarm contact to RTU (setup in User Function for “Substation Monitor”) No data communications to other equipment.
• Instrument Transformer Data Bus VTs: 3 × Wye connected, ratio = 14.4 kV:120 V Phase CTs: 3 × Wye connected, ratio = 600:5 A
• Phase Protection Settings Time Overcurrent 1: Curve Shape = Moderately Inverse; Pickup = 840 A; Multiplier = 20.2 Instantaneous Overcurrent 1: Pickup = 840 A; Phases Required = Any Two; Delay = 0 seconds Instantaneous Overcurrent 2: Pickup = 10100 A; Phases Required = Any Two; Delay = 0 seconds
• Neutral Protection Settings Time Overcurrent 1: curve shape = Moderately Inverse; pickup = 120 A; multiplier = 10 Instantaneous Overcurrent 1: Pickup = 120 A; Delay = 0 seconds Instantaneous Overcurrent 2: Pickup = 2000 A; Delay = 0 seconds You should now be familiar with maneuvering through and editing setpoint messages. As such, we