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Honeywell MC-TDOR22 Digital Output Relay Field Termination Assembly

Configured for relay contact switching in Honeywell TDC 3000 and Experion PKS HPM I/O systems, the Honeywell MC-TDOR22 51309150-175 (MC-TDOR22 Digital Output Relay FTA) provides direct electrical execution between process control outputs and field devices.

Hardware Specifications

Parameter	Specification
Model	MC-TDOR22
Brand	Honeywell
Part Number	51309150-175
Origin	USA
Module Type	Digital Output Relay Field Termination Assembly
System Compatibility	Honeywell TDC 3000 / Experion PKS HPM I/O
Output Channels	16 channels
Output Type	Electromechanical relay contacts
Contact Configuration	SPDT / SPST depending on terminal configuration
Maximum Switching Voltage	Approximately 250 VAC / 30 VDC
Maximum Switching Current	2 A to 5 A per channel depending on configuration
Isolation	Channel-to-system and channel-to-channel isolation
Mounting Type	Honeywell FTA mounting rack / DIN rail compatible assembly
Weight	Not specified in available documentation
Dimensions	Not specified in available documentation
Operating Temp	0 deg C to +60 deg C
Storage Temp	-40 deg C to +85 deg C
Relative Humidity	5% to 95% RH non-condensing
Power Consumption	Determined by connected HPM I/O interface and relay load conditions

DCS Signal Isolation and Relay Switching Characteristics

The MC-TDOR22 interfaces Honeywell process controllers with discrete field loads through relay-based switching circuits. It converts low-level digital output commands from the HPM subsystem into isolated contact outputs for external devices.

Furthermore, the module applies channel-to-channel isolation to reduce electrical interference between independent output points. The relay interface supports field devices such as solenoid valves, motor starters, annunciators, and alarm circuits while maintaining separation between controller electronics and external wiring.

For Honeywell DCS architectures, the module operates with discrete I/O signal conditioning methods rather than analog communication protocols such as 4-20 mA HART or FOUNDATION Fieldbus. Therefore, installation requires correct terminal assignment, field power separation, and grounding practices to maintain signal integrity.

Frequently Asked Questions

Q: Does the MC-TDOR22 provide direct relay contacts for field equipment control?
A: Yes. The MC-TDOR22 provides relay contact outputs that allow digital commands from Honeywell HPM I/O systems to control external electrical loads.

Q: Does the module provide channel isolation?
A: Yes. The module provides channel-to-system and channel-to-channel isolation to limit electrical interference between output circuits.

Q: Can the MC-TDOR22 operate as an analog output interface?
A: No. The MC-TDOR22 is a digital relay output assembly designed for discrete switching applications only.

Field Installation Guidelines

• Install the MC-TDOR22 within the designated Honeywell FTA mounting structure according to the applicable cabinet layout documentation.
• Verify terminal assignments before connecting field wiring to prevent incorrect relay output activation.
• Separate relay load wiring from low-level signal wiring where possible to reduce electromagnetic interference.
• Connect cable shields according to the system grounding design and avoid creating unnecessary ground loops.
• Confirm field load voltage and current ratings before energizing connected equipment.
• Inspect relay contact wiring, terminal tightness, and protective grounding during commissioning activities.

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