GE IS200TRLYH1B Relay Output Terminal Board

Description

The GE IS200TRLYH1B, also cataloged as the IS200TRLYH1B Relay Output Terminal Board, is part of the Mark VIe turbine control platform. It provides relay‑based discrete outputs with TMR contact voting, combining R, S, and T relay sections to form voted Form A contacts for high‑integrity trip and control functions. The board supports 12 voted relay outputs using a total of 36 sealed relays.

Hardware Specifications

• Part Number: IS200TRLYH1B

• Manufacturer: General Electric

• Series: Mark VIe

• Product Type: Relay Output Terminal Board

• Number of Channels: 16 (board-level), 12 TMR‑voted outputs

• Relay Type: SPDT

• Relay Contact Rating: 10 A

• Input Voltage Range: 12 V, 24 V

• Relay Switching Current: Max 10 A

• Analog Outputs: 0-20 mA

• Output Resolution: 12‑bit

• Output Impedance: 10 Ohm

• Mounting Type: DIN rail

• Technology: Surface‑mount

• Size: 17.8 cm wide x 33.02 cm

• Operating Temperature: -30 to 65 deg C

• Country of Origin: United States

• Manual Reference: GEH‑6721D

Profinet / EtherNet/IP Deterministic Networks

Within Mark VIe architectures, the IS200TRLYH1B interfaces through deterministic backplane communication. Relay commands from the controller are distributed to R, S, and T sections, where TMR logic performs contact voting. Firmware flash compatibility ensures coordinated updates across relay sections without interrupting output integrity. I/O density scaling allows the TRLY board to integrate into simplex or TMR racks with consistent timing behavior.

Frequently Asked Questions (FAQ)

Q: How many relays are used to form each voted output? A: Three relays—one from each R, S, and T section—are combined to form a single Form A voted output.

Q: Can the IS200TRLYH1B be hot‑swapped? A: No. The board requires system de‑energization before removal or insertion to maintain relay integrity and prevent unintended output transitions.

Q: What voltages can be applied to the relay contacts? A: The relay contacts support 24/125 VDC or 115 VAC, depending on system wiring.

Field Installation Guidelines

• Mount the board on a DIN rail with full connector engagement to the Mark VIe rack.

• Ensure proper routing of discrete output wiring to avoid induced noise from high‑current conductors.

• Maintain separation between analog and relay wiring to reduce interference.

• Verify correct polarity and voltage rating before energizing relay circuits.

• In TMR systems, confirm all three relay sections (R, S, T) are connected for proper voting behavior.

• Use shielded wiring where required and ground shields at a single point to prevent ground loops.