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Core Technical Specifications
The MC-TDOR22 51309150-175 relay digital output module provides sixteen independent electromechanical relay outputs for high-power switching applications. This unit measures 180 millimeters in height, 40 millimeters in width, and 170 millimeters in depth, with a total weight of approximately 0.72 kilograms. Each relay channel supports a maximum switching current of 6 amperes at 250 volts AC or 30 volts DC. The module features silver-nickel alloy contacts for superior resistance to arcing and contact welding.
| Parameter | Specification |
|---|---|
| Dimensions (H x W x D) | 180 x 40 x 170 mm |
| Weight | 0.72 kg |
| Output Channels | 16 relay (SPST-NO) |
| Switching Voltage (max) | 250V AC / 30V DC |
| Switching Current (max) | 6 A (resistive load) |
| Contact Material | Silver-nickel alloy |
| Coil Voltage | 24V DC |
| Response Time | 8 ms (pick-up), 6 ms (drop-out) |
| Expected Mechanical Life | 20 million operations |
| Expected Electrical Life | 150,000 operations (at rated load) |
| Logic Supply | 200 mA @ 5V DC |
| Field Supply | 24V DC (external) |
| Memory | 2 KB RAM, 1 KB EEPROM |
| Operating Temperature | -20 to 70 °C |
| Humidity | 5% to 95% RH |
| Isolation | 2500V (coil-to-contact) |
| Standards | CE, UL 508, CSA |
Relay Performance and Switching Characteristics
The MC-TDOR22 51309150-175 delivers fast switching with a typical pick-up time of 8 milliseconds and drop-out time of 6 milliseconds. Each relay incorporates arc suppression circuitry to minimize contact wear when switching inductive loads. The module supports both AC and DC load switching with a resistive rating of 6 amperes maximum. It provides LED status indicators that clearly show the energization state of each relay channel. This board also includes a mechanical flag indicator for visual verification of relay position.
Physical Installation and Connectivity
You can install this module into any standard Honeywell Series C backplane using its single-slot design. Its front panel includes a 50-pin D-sub connector for all field output wiring terminations. LED indicators display power presence and relay activation status for each channel. The unit’s 40-millimeter width enables efficient utilization of control cabinet space. The module’s rugged metal housing provides effective protection against vibration and electromagnetic interference.
Memory and Diagnostic Resources
The MC-TDOR22 51309150-175 stores relay state data and diagnostic information in 2 kilobytes of internal dual-port RAM. It retains configuration settings and default states in 1 kilobyte of non-volatile EEPROM memory. This module maps each relay output to a specific bit address in the processor’s I/O table. It provides coil voltage monitoring to detect open-circuit or short-circuit conditions. The unit also includes a watchdog timer that de-energizes all relays upon detecting a communication failure.
Power Distribution and Environmental Tolerance
This module draws a typical current of 200 milliamperes from the 5-volt DC backplane supply. It requires a separate external 24-volt DC field supply rated at 300 milliamperes for relay coil energization. The MC-TDOR22 51309150-175 operates reliably across a wide temperature range from -20 to 70 degrees Celsius. It withstands humidity levels between 5% and 95% without condensation. The unit provides 2500 volts of galvanic isolation between the relay coils and the logic bus.
Configuration and Operational Flexibility
You can configure each relay channel for normally-open operation with programmable safe-state behavior. The module supports continuous and pulsed output modes for diverse load types. It provides adjustable output delay settings from 0 to 100 milliseconds per channel. You can also assign manual override functions for maintenance and troubleshooting purposes. This configuration flexibility makes the module suitable for motor starters, valve actuators, and alarm annunciator panels.