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Configured for high-reliability signal conversion and switching in process control platforms, the Yokogawa ARM55T (ARM55T Mechanical Relay Terminal Board) provides direct physical/electrical execution.
| Parameter | Specification |
|---|---|
| Model | ARM55T |
| Brand | Yokogawa |
| Origin | Standard Industrial Specification |
| Weight | 2.2 kg |
| Dimensions | 19-inch rack mount, 3U height |
| Operating Temp | 0 deg C to 50 deg C |
| Power Consumption | 24 V DC, approx 0.65 to 0.85 A |
| Contact Points | 32 points (SPST, Normally Open or Normally Closed) |
| Maximum Load | 30 V DC, 1.5 A per point |
| Isolation Voltage | 2 kV AC (field terminals to case) |
The hardware configuration maintains strict galvanic isolation and high dielectric strength across power and field terminals to suppress transient voltage surges and prevent ground loop interference from heavy-duty actuators. Integration with standard process control communication protocols and 32-channel wet contact relay switching ensures reliable execution of control interlocks, alarm actuation, and transparent command transmission without signal degradation.
Q: What are the restrictions regarding load switching limits across the ARM55T terminal board channels?
A: Each individual point must operate within specified maximum load ratings of 30 V DC at 1.5 A to prevent contact degradation or welding under continuous load.
Q: How is manual intervention managed during system maintenance on individual channels?
A: Each channel features a dedicated integrated AUTO/OFF/ON override switch, permitting manual control state manipulation during testing or commissioning phases.
Mount the unit securely into a standard 19-inch rack enclosure with 3U height clearance, ensuring proper grounding continuity to the cabinet frame. Route high-load power switching lines away from sensitive low-voltage control cables and use shielded wiring where applicable. Terminate cable shielding and ground drain wires securely to the designated cabinet earth grounding bar using M4 screw terminals.
