MRD1T2HTL6M42 Woodward Digital Speed Control Module

The Woodward MRD1T2HTL6M42, also cataloged as the MRD1T2HTL6M42 Digital Speed Control Module, operates as a dedicated hardware component for closed-loop engine speed governing and speed signal processing within industrial control systems. Powered by a 24 VDC input with a 10 W power consumption, the module exchanges realtime parameters over 2x Ethernet, 1x RS232, and 1x RS485 communication ports. The hardware is housed in a 273.6 mm x 214.1 mm x 59.2 mm enclosure weighing 1.5 kg, executing continuous signal calculations across operating temperatures ranging from -40 deg C to +70 deg C.

Hardware Specifications

Actuator Loop Feedback Response

The Woodward MRD1T2HTL6M42 digital speed control module incorporates closed-loop algorithms designed to stabilize actuator loop feedback response during dynamic speed demands. High-speed input channels continuously process speed sensor pulses, generating corrected actuator command outputs with minimal phase delay. Communication streams active across the dual Ethernet, RS232, and RS485 serial interfaces operate independently of internal governing execution cycles, preventing control loop latency and eliminating transient speed hunting under step-load changes.

Frequently Asked Questions

Q: What power wiring guidelines must be observed when supplying 24 VDC to the module terminal block?

A: Connect the 24 VDC power feed using dedicated stranded copper conductors sized appropriately to minimize line voltage drop. Ensure correct polarity alignment at the power terminals prior to energizing, and install an external fast-acting inline fuse to protect internal board circuitry from overcurrent events.

Q: How should communication cable shielding be terminated across the Ethernet, RS232, and RS485 ports?

A: Shielded twisted-pair cables are required for all serial and network communication links. Terminate cable shields directly to the cabinet ground bus at a single point to prevent ground loop currents from interfering with data transmission across the RS232 and RS485 lines.

Field Installation Guidelines

Mount the module securely inside an IP-rated industrial panel enclosure using appropriate mounting hardware, maintaining structural stability against machine vibration. Ensure adequate physical clearance surrounding the housing to allow natural air convection across the enclosure surface for heat dissipation. Route low-level speed sensor wiring and communication lines in dedicated wire raceways separated from 24 VDC power circuits and high-voltage AC conductors. Bond the protective chassis grounding connection to the central enclosure earth ground bar via a short, low-impedance copper grounding wire prior to initial power-up.