General Electric 4136J57-G01 Mark III Dual Set-Point Board

The General Electric 4136J57-G01, also cataloged as the 4136J57 Dual Set-Point Board, operates as a dedicated hardware component for closed-loop setpoint evaluation and discrete alarm execution within Mark III gas turbine control systems.

Hardware Specifications

Backplane Bus Architecture and Relay Option Scaling

• The General Electric 4136J57-G01 processes measured parameters against operator-defined set points inside closed-loop two-point (bang-bang / on-off) control schemes for gas turbine management.
• The module features configurable plug-in relay interfaces supporting either dual 8 A, 250 VAC electromechanical contact relays or dual Form A AC/DC solid-state relays rated at 120 mA (125 VAC) / 250 mA (150 VDC).
• The solid-state relay configuration suppresses switching arc degradation, making it optimized for high-duty-cycle, low-load alarm and control interface loops.
• System scaling across the Mark III backplane ensures fixed impedance matching and low bus loading when interfacing with Micro DPMs, digital counters, and remote display modules.

Frequently Asked Questions

Q: How does the two-point control logic execute switching operations on the 4136J57-G01?

A: The board continuously compares incoming measured parameter signals against pre-set threshold values, toggling output state contacts instantly whenever an offset is detected across the closed-loop control path.

Q: Which relay configuration is recommended for rapid, high-cycle switching applications?

A: The solid-state relay plug-in option (120 mA at 125 VAC / 250 mA at 150 VDC) is specified for heavy duty cycles and light loads to prevent contact wear experienced by mechanical relays.

Q: Can the 4136J57-G01 board be extracted from the chassis backplane while energized?

A: No, primary system AC power must be isolated and de-energized prior to removing or inserting the board to avoid arc generation across edge connector pins.

Field Installation Guidelines

1. De-energize all AC/DC power feeds to the Speedtronic Mark III rack enclosure prior to opening access doors.
2. Put on an anti-static wrist strap anchored to cabinet frame ground to prevent electrostatic damage to board components.
3. Align card edge rails with designated slot guides inside the chassis card cage.
4. Press the 4136J57-G01 firmly into the slot until edge connectors slide fully into the backplane receptacles.
5. Tighten front panel retainers to secure structural ground continuity and insulate against operational vibration.