Overview
Hardware Specifications
| Parameter | Specification |
|---|---|
| Model | ARM15A-000 |
| Brand | Yokogawa Electric Corporation |
| Product Type | Relay Board |
| Application | FIO subsystem relay input interface for CENTUM VP |
| Relay Function | Mechanical relay contact input |
| Contact Points | 32 points |
| Field Device Terminals | M4 screw terminals |
| Compatible Modules | ADV151 (DI: 32 points) + ATD5A terminal block; ADV161 (DI: 64 points) |
| Signal Cables | AKB331 for 32-point connection; AKB337 for 64-point connection |
| Contact Input Signal | ON signal: 150 ohm or less; OFF signal: at least 200 kohm |
| External Contact Rating | 24 VDC, 13 mA minimum load |
| Power Supply Voltage | 24 VDC |
| Power Consumption | Max. 0.32 A internal circuit consumption |
| Field Device Power Supply | External dual-line supply, 24 VDC max. 0.3 A per line for each 16-point group |
| Insulation Resistance | At least 10 Mohm at 500 VDC |
| Withstanding Voltage | Field terminals to case: 1.5 kV; 24 V power terminals to case: 500 V; 24 V power terminals to field terminals: 1.5 kV |
| Operating Temp | 0 to 50 deg C |
| Operating Humidity | 10 to 90% RH |
| Dimensions | W: 482.6 mm x H: 132.5 mm (3U) |
| Weight | 2.2 kg |
| Mounting Type | 19-inch rack mountable |
| Standards | EMC standards, CE Marking, C-Tick Marking |
Yokogawa DCS Relay Interface and Signal Isolation Characteristics
The ARM15A-000 operates as a mechanical relay contact input board within the Yokogawa CENTUM VP FIO architecture. It receives dry contact signals or voltage input signals from field devices and transfers these signals to digital input modules.
Furthermore, the relay interface supports single or dual-redundant digital input configurations. The board provides electrical separation between field wiring and FIO digital input modules through relay contact structures.
For Yokogawa process control installations, the relay board supports channel-to-channel isolation requirements for discrete signal handling. However, it does not process analog loops such as 4-20 mA HART or FOUNDATION Fieldbus signals because it is designed specifically for digital contact input applications.
Frequently Asked Questions
Q: What type of field signals does the ARM15A-000 accept?
A: The ARM15A-000 accepts mechanical dry contact input signals and voltage-based contact input signals for FIO digital input modules.
Q: Can the ARM15A-000 support redundant digital input configurations?
A: Yes. The relay board supports single and dual-redundant digital input module configurations when connected with compatible CENTUM VP FIO modules.
Q: Does the ARM15A-000 require an external power supply for field devices?
A: Yes. The field device power supply requires an external 24 VDC source with dual-line distribution for each 16-point section.
Field Installation Guidelines
- Install the ARM15A-000 inside the specified 19-inch rack system and secure the module using the appropriate mounting hardware.
- Connect field device wiring to the M4 screw terminals according to the assigned contact input channels.
- Separate field signal cables from high-voltage power cables to reduce electrical interference.
- Connect cable shields according to the plant grounding standard and avoid multiple grounding points on signal circuits.
- Verify contact polarity, external 24 VDC supply wiring, and terminal assignments before system commissioning.
- Confirm that connected digital input modules match the supported ADV151 or ADV161 module configurations.
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