IS200TREGH1B | GE Mark VIe Turbine Emergency Terminal Board

GE IS200TREGH1B Mark VI Turbine Emergency Terminal Board — 6-Channel, 3 Trip Solenoids, 125VDC

The IS200TREGH1B is a Turbine Emergency Terminal Board (TREG) for GE's Mark VI turbine control platform. It powers three emergency trip solenoids and manages emergency overspeed protection and emergency stop operations. The board features 12 relays (nine in three voting groups of three) controlled by the I/O controller, with 12 isolation transformers and 48 high-density terminals for secure field wiring.

Key Specifications

• Manufacturer: General Electric / GE Energy
• Series: Mark VI / Speedtronic
• Type: Turbine Emergency Terminal Board
• Channels: 6
• Trip Solenoids Powered: 3
• Power Supply Input: 200–250 VAC
• Bus Voltage Range: 70–145 VDC
• DC Solenoid Power Type: Positive (TREG supplies positive side; TRPG supplies negative side)
• Relays: 12 (nine form three voting groups of three for trip solenoid control)
• Transformers: 12 isolation transformers (square, covered by transparent plastic with silver wire)
• Terminal Blocks: 2 large black terminal blocks, 48 silver metal terminals total (24 each)
• Operating Temperature: 0°C to 70°C
• Operating System: QNX
• Dimensions: 17.8 cm (W) × 33.02 cm (H)
• Weight: ~2.00 lbs (~0.91 kg)
• Country of Origin: USA (Salem, Virginia)
• Manual: GEH-6421
• PCB Coating: Conformal coating (moisture/salt spray/mildew resistant)

Architecture & Connectivity

• Associated Board: IS200TRPGH1B (Primary Trip Terminal Board) — TREG and TRPG can be wired together for up to three trip solenoids
• Power Distribution: Control power from JX1, JY1, JZ1 connectors is diode-combined for redundant power to status feedback circuits and economizing relays
• Trip Relay Circuits: Power isolation maintained for trip relay circuits
• I/O Controller: All aspects controlled by I/O controller; J2 power cable and trip solenoids are the only connections to control modules
• Simplex Trip Signal: Third cable from J1 to TSVO terminal board operates servo valve clamp on turbine trip
• Compatibility: TREG and PPRO are compatible with Mark VI systems; connected via molded plug cables
• Jumper Ports: JH1 (3 ports), J2 (12 ports), J1 (2 ports) — 17 total

Installation Guide

1. Mount the TREG board on a sheet metal carrier with plastic insulator — DIN rail or cabinet panel.
2. Wire three trip solenoids to the first I/O terminal block, including economizing resistors and emergency stop.
3. Wire up to seven trip interlocks to the second terminal block.
4. Connect J2 power cable to the I/O controller.
5. Connect J1 trip signal cable to TSVO terminal board (simplex systems).
6. Connect JX1, JY1, JZ1 for redundant control power input.
7. Verify all 12 transformers and 48 terminals are properly seated.
8. Power on and verify relay operation via I/O controller diagnostics.

FAQ

Q: What is the difference between IS200TREGH1B and IS200TRPGH1B?
A: IS200TREGH1B supplies the positive side of DC power to trip solenoids and manages emergency stop/overspeed protection. IS200TRPGH1B supplies the negative side of DC power. Both can be wired together for up to three trip solenoids.

Q: What does the H1B suffix mean?
A: "H1" indicates conformal PCB coating and Group one Mark VI product grouping. "B" is the B-rated primary functional revision. H1B is the most common variant for 125VDC applications.

Q: What is the difference between H1B, H1BDB, and H1BEC?
A: H1BDB and H1BEC are factory-installed component or coating revisions of the base H1B board. All remain functionally compatible with Mark VI systems.

Q: Is this board compatible with Mark VIe?
A: No. IS200TREGH1B is designed for Mark VI systems. Mark VIe uses different terminal board architecture.

Q: What protection is built-in?
A: Voltage-limiting hardware including diodes, resistors, capacitors, transistors, ICs, and MOVs. Optical isolation and transformer isolation protect the control core from field-side interference.

Q: Can I use this without the TRPG board?
A: For single solenoid applications, TREG can operate alone. For multiple solenoids or full redundancy, wire TREG with TRPG as a pair.

Selection Tips

• Mark VI, 3 trip solenoids, 125VDC, emergency stop/overspeed: IS200TREGH1B
• Always pair with: IS200TRPGH1B (negative side power) for full trip solenoid control
• Verify system voltage: 125VDC is standard; H1B is the most common variant
• Check I/O controller compatibility: Must be Mark VI PPRO or compatible controller
• Order spare fuses and relays for maintenance — 12 relays and 18 fuses (various ratings)

Why Buy from Us?

• 100% Genuine GE / GE Energy product
• Brand new or professionally refurbished with warranty
• 12-month warranty on new; up to 24 months on repairs
• Fast global shipping with ESD-safe packaging
• Technical support for Mark VI integration
• Bulk pricing for power plant and turbine OEMs

Reference: GE Mark VI Control Product Description; GE Speedtronic Mark VI Turbine Control System Manual GEH-6421; AxControl hardware analysis; World of Controls technical specifications. Specifications subject to change without notice. Verify system compatibility before ordering.