Overview
Functional Description
The ARM55C-000 provides an interface between the FIO digital output module and external field devices. Its mechanical relays switch the output contacts according to the signals received from the digital output module. Furthermore, the relay contacts provide electrical separation between the control-side signals and field-device circuits.
Each output point supports a maximum load of 1.5 A at 30 VDC. The contact configuration can use either a-contact (normally open) or b-contact (normally closed) operation, depending on the selected configuration.
I/O Configuration and Connections
The board provides 32 dry-contact output points with M3.5 screw terminals. It also uses M4 terminals for the 24 VDC power input. In addition, the specified connection modules include ADV551 with ATD5A for 32-point output and ADV561 for 64-point output configurations.
The listed associated cable models are AKB331 for 32-point connections and AKB337 for 64-point connections. Confirm the connection arrangement and required accessories against the installed system configuration before ordering.
Technical Specifications
| Parameter | Specification |
|---|---|
| Model | ARM55C-000 |
| Brand | Yokogawa |
| Product Type | Mechanical Relay Output Board |
| Output Type | Mechanical Relay, Dry Contact |
| Number of Output Points | 32 |
| Contact Configuration | a-contact (NO) or b-contact (NC) |
| Redundancy | Single or dual-redundant |
| Maximum Switching Voltage | 30 VDC |
| Maximum Load Current | 1.5 A per point |
| Contact Test Condition | 5 V, 10 mA |
| Power Supply | 24 VDC |
| Maximum Power Supply Current | 0.85 A |
| Terminal Type | M3.5 screw terminals |
| Power Input Terminals | M4 screws |
| Insulation Resistance | At least 10 MOhm at 500 VDC |
| Dielectric Strength (Field Terminals to Case) | 2 kV |
| Dielectric Strength (24 V Power Terminals to Case) | 500 V |
| Dielectric Strength (24 V Power Terminals to Field Terminals) | 2 kV |
| Operating Temperature | 0 to 50 deg C |
| Operating Humidity | 10 to 90 %RH |
| EMC Compliance | CE Marking, C-Tick Marking |
| Dimensions | 482.6 x 132.5 mm (3U) |
| Weight | 2.2 kg |
Compatible Modules and Accessories
The original specifications identify the following associated components:
- ADV551: 32-point digital output module.
- ATD5A: Terminal block for the ADV551 configuration.
- ADV561: 64-point digital output module.
- AKB331: Connection cable for 32-point configurations.
- AKB337: Connection cable for 64-point configurations.
For example, the ADV551 and ATD5A combination is specified for the 32-point output arrangement. Check the system wiring and hardware revision before selecting associated components.
Frequently Asked Questions
Q: What is the main function of the Yokogawa ARM55C-000?
A: The ARM55C-000 provides 32 mechanical dry-contact relay outputs. It interfaces an FIO digital output module with external field devices and switches their circuits through relay contacts.
Q: Does the ARM55C-000 support redundant configurations?
A: Yes. The specified configuration supports both single and dual-redundant operation. The actual arrangement depends on the connected FIO system configuration.
Q: What is the maximum output load per channel?
A: Each output point supports a maximum load current of 1.5 A at 30 VDC. Ensure that the field-device voltage and current remain within these specified limits.
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