GE Energy Mark* VIe Control Product Description

locations. 

An infrared transceiver is useful for low-level diagnostics. I/O values can be 

monitored, I/O pack host/function names can be programmed, and error statuses can 

be checked. This requires a Windows®-based diagnostic tool on a laptop or a 

handheld computer. 

• Dual 100 MB Ethernet ports 

• 100 MB full duplex ports 

• Online repair per I/O pack 

• Operation -30°C to 65°C (-22 °F to 149 °F) 

• Accuracy -30°C to 65°C (-22 °F to 149 °F) 

• I/O packs rated Class 1, Div. 2 

• Ambient temperature sensor 

• LEDs: power status and attention 

• LEDs: Ethernet link-connected and communication-active 

• LEDs: application-specific 

• Processor: 32-bit RISC CPU 266 mHz 

• Infrared Transceiver: Low level diagnostics, monitor I/O, 

set host/function names, error status 

• Power: 28 V dc (typical) 

• Internal solid-state circuit breaker and soft start 

The I/O Processor contains a temperature sensor that is accurate to within ±2°C 

(±3.6 °F). Detection of an excessive temperature generates a diagnostic alarm, and 

the logic is available in the database (signal space) to facilitate additional control 

action or unique process alarm messages. In addition, the temperature is 

continuously available in the database. 

A power supply provides a regulated 28 V dc power feed to each I/O pack. The 

negative side of the 28 V dc is grounded through the I/O pack metal enclosure and its 

mounting base. The positive side has solid-state circuit protection built-into the I/O 

pack with a nominal 2 A trip point. Online repair is possible by removing the 

28 V dc connector, replacing the I/O pack, reinserting the power connector, and 

downloading software from the software maintenance tools. 

Note Every I/O pack communicates directly on IONet, which enables each I/O pack 

to be replaced individually without affecting any other I/O in the system. Also, the 

I/O pack can be replaced without disconnecting any field wiring

Terminal Blocks 

Signal flow begins with a sensor connected to a terminal block on a board. There are 

two types of boards available. T-type boards contain two 24 point, barrier-type, 

removable, terminal blocks. Each point can accept two 3.0 mm2

 (#12AWG) wires 

with 300 V insulation per point with spade or ring type lugs. In addition, captive 

clamps are provided for terminating bare wires. Screw spacing is 9.53 mm (0.375 

inch) minimum, center-to-center. 

A shield strip is provided next to each block, which is actually the left-hand side of 

the metal base where the board is mounted. Wide and narrow boards are arranged in 

vertical columns of high and low-level wiring that can be accessed from top and/or 

bottom cable entrances. An example of a wide board is a board that contains 

magnetic relays with fused circuits for solenoid drivers. T-type boards are normally 

surface mounted, but can also be DIN-rail mounted. 

S-type boards have one I/O pack for simplex and dual redundant systems. They are 

half the size of T-type boards and are DIN-rail or surface mounted. Two versions of 

the boards are available, H1 and H3. H1 boards have fixed terminal blocks, and H3 

boards have removable terminal blocks. A H2 version is available for mounting of 

custom blocks such as spring-cage or insulation displacement. 

S-type boards have box type terminal blocks that accept one 3.0 mm2

 (#12AWG) 

wire or two 2.0 mm2

 (#14AWG) wires with 300 V insulation per point. Screw 

spacing is 5.08 mm (0.2 inch) minimum, center-to-center. A shield strip is provided 

to the left of each block. It can be connected to a metal base for immediate grounding 

or floated to allow individual ground wires from each board to be wired to a 

centralized, cabinet ground strip.

I/O Types 

General purpose I/O is used for both turbine applications and process control. 

Turbine-specific I/O is used for direct interface to the unique sensors and actuators 

on turbines. This reduces or eliminates a substantial amount of interposing 

instrumentation. As a result, many potential single point failures are eliminated in the 

most critical area for improved running reliability and reduced long-term 

maintenance. Direct interface to the sensors and actuators also enables the 

diagnostics to directly interrogate the devices on the equipment for maximum 

effectiveness. This data is used to analyze device and system performance. Also, 

fewer spare parts are needed. 

 I/O Type - General Purpose Board 

Redundant 

Packs/Boards 

24 DI (125 V dc, group isolated) 1 ms SOE TBCIH1 1 or 2 or 3 

24 DI (24 V dc, group isolated) 1 ms SOE TBCIH2 1 or 2 or 3 

24 DI (48 V dc, group isolated) 1 ms SOE TBCIH3 1 or 2 or 3 

24 DI (115/230 V ac, 125 V dc, point isolated) 1 ms SOE on 125 V dc TBCIH1 1 or 2 or 3 

24 DI (24 V dc, point isolated) TBCIH2 1 or 2 or 3 

24 DI (24 V dc, group isolated) STCIH1 1