Technical Overview
The ADM51C is a high-density relay-style contact output module for Yokogawa DCS systems (CENTUM VP and CS 3000). It provides 16 discrete dry-contact outputs, organized in two isolated groups of eight channels. The module is used for controlling external devices such as solenoid valves, alarm signals, or interposing relays. It ensures deterministic performance, high electrical isolation, and reliability suitable for continuous process control.
Detailed Specifications
| Item | Specification |
|---|---|
| Module Type | Contact Output Module (Relay) |
| Model Number | ADM51C |
| Channels | 16 channels, isolated in 2 groups of 8 |
| Output Type | Dry contact (No power supplied) |
| Contact Ratings | 30 V DC, 2 A; 125 V AC, 0.4 A; 250 V AC, 0.2 A |
| Withstanding Voltage | 2300 V AC (output-to-system); 1000 V AC (channel-to-channel) |
| Response Time | Max 10 ms (at rated load) |
| Mechanical Life | 20 million operations |
| Electrical Life | 100,000 operations (at rated load) |
| Power Consumption | 5 V DC, 350 mA |
| Mounting Compatibility | ANB10S, ANB10D, ANT10 units |
| Weight | 0.4 kg |
Operational Capabilities
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Mechanical relay outputs provide clean isolation for field devices.
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Two isolated groups of 8 channels protect the system from electrical faults in any single group.
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Dry-contact design allows connection to a wide variety of voltage levels and signal types.
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Ideal for triggering low-power solenoids, alarms, or relays; not for direct high-power motor loads.
Technical FAQ
Can the ADM51C drive high-power AC motors directly?
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No. It is intended to trigger interposing relays or low-power loads. High-power motors require separate motor starters or contactors.
Why is the high withstanding voltage important?
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Protects the DCS backplane from field-side voltage surges or spikes, enhancing system resilience.
Is the module hot-swappable?
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Yes, in a redundant Yokogawa FIO node configuration, it can be replaced while the system is running, following plant safety procedures.
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