FC-TDO-1624 Honeywell Digital Output Module

The Honeywell FC-TDO-1624, also cataloged as the FC-TDO-1624 Digital Output Module, operates as a dedicated hardware component for solid-state digital output switching within Honeywell Safety Manager and Experion PKS platforms. Designed to drive field actuators and indicators, the module controls 16 independent channels delivering a nominal 24 VDC at 0.5 A per channel, with a maximum aggregate rack load capacity of 8 A. Weighing approximately 0.7 kg, the unit executes discrete loop control across an operating thermal envelope of -20 to +70 deg C while maintaining full galvanic isolation across all physical channels.

Hardware Specifications

Channel-to-Channel Galvanic Isolation & Loop Integrity

The FC-TDO-1624 incorporates channel-to-channel and channel-to-system galvanic isolation barriers to prevent cross-talk and earth fault propagation across field loops. By isolating each of the 16 solid-state 24 VDC channels from adjacent signals and the backplane logic rail, the module mitigates transient noise interference when driving 4-20 mA HART loop protocol auxiliary relays or discrete valve solenoids. This isolation barrier prevents ground loop circulating currents from causing unintended state changes or field signal offsets in sensitive process safety channels.

Frequently Asked Questions

Q: What is the maximum current rating permitted when multiple output channels are driven simultaneously?

A: Each individual output channel supports up to 0.5 A at 24 VDC nominal, provided the total combined current across all 16 channels does not exceed the maximum aggregate load rating of 8 A.

Q: Is hot-swapping supported for the FC-TDO-1624 inside a live Safety Manager chassis?

A: Removal and insertion of the module must strictly adhere to Honeywell Safety Manager rack maintenance procedures to prevent system fault trips and ensure proper backplane communication re-establishment.

Field Installation Guidelines

1. Align the FC-TDO-1624 module with the designated card slot guides in the Safety Manager rack enclosure and slide it in until the backplane connectors fully seat.
2. Tighten the top and bottom chassis retention screws to ensure continuous chassis frame grounding and mechanical stability.
3. Terminate external 24 VDC field output lines to the dedicated terminal block, ensuring that total current draw across all active channels remains below the 8 A threshold.
4. Route field output wiring in separate raceways away from high-voltage AC lines to minimize electromagnetic noise coupling onto the discrete DC output loops.