This contact output module provides thirty-two relay switching channels. The Yokogawa ADM51C belongs to the Advantum DCS product family. You can control solenoids, motors, and alarm indicators efficiently. Its high channel density maximizes output count per rack slot.
Physical Dimensions and Hardware Layout
The Yokogawa ADM51C measures 12.5 cm in overall width. Its total depth reaches 15.0 cm including the terminal blocks. This contact output module weighs approximately 0.62 kg. A metal housing provides excellent shielding against electrical noise. One green LED indicates backplane power status. Two LED bars display output status for all channels efficiently.
Output Specifications and Load Handling
Each output channel uses a Form A (SPST-NO) electromechanical relay. The Yokogawa ADM51C switches resistive loads up to 1.0A at 250V AC. The relay also handles 1.0A at 30V DC for DC applications. Built‑in snubber circuits protect contacts from inductive load arcing. Two terminal blocks accommodate all field wiring connections.
| Parameter | Specification |
|---|---|
| Number of Channels | 32 |
| Output Type | Form A relay (SPST-NO) |
| Max Load (Resistive AC) | 250V AC, 1.0A |
| Max Load (Resistive DC) | 30V DC, 1.0A |
| Max Load (Inductive AC) | 250V AC, 0.3A |
| Max Load (Inductive DC) | 30V DC, 0.3A |
| Contact Resistance | < 100 mΩ initial |
| Mechanical Life | 10 million operations |
| Electrical Life | 100,000 operations at rated load |
| Operate Time | 8 ms typical |
| Release Time | 4 ms typical |
| Dimensions (W x H x D) | 125 mm x 100 mm x 150 mm |
| Weight | 0.62 kg (1.37 lbs) |
| Terminal Type | Two removable 20‑pin screw blocks |
| Wire Size | 0.2 to 2.5 mm² |
| Number of Terminal Screws | 40 |
| Backplane Current Draw | 350 mA @ 5V DC |
| Power Dissipation | 4.5 W max at full load |
| Internal Energy Storage | 150 µF capacitor for coil hold‑up |
| Isolation Voltage | 1500 Vrms coil‑to‑contacts |
| Protection Features | Snubber circuit per channel |
| Number of Components | 1 main board, 32 relays, 2 terminal blocks |
| LED Indicators | 1 green (power), 32 red (channels) |
| Operating Temperature | 0°C to +55°C |
Energy Storage and Output Behavior
Internal capacitors maintain relay coil power during brief power dips. The Yokogawa ADM51C stores enough energy for 10 ms of hold‑up time. This storage prevents false output resets during short interruptions. All relays de‑energize safely after a power failure longer than 10 ms.
Protection Circuits and Load Compatibility
Snubber circuits across each relay contact reduce inductive arcing. The Yokogawa ADM51C handles AC and DC loads without external suppressors. Each output shares a common terminal for bank grouping. Four isolated groups of eight outputs share common returns. Therefore, one card serves multiple voltage types safely.
Wiring and Installation Guidelines
Connect field loads to the two removable screw terminal blocks. The Yokogawa ADM51C accepts solid or stranded wires from 0.2 to 2.5 mm². Connect each load between the common terminal and the NO contact. Use separate commons for AC and DC loads on the same card. Proper fusing protects relay contacts from overload damage.
Details
| Weight | 0.7 kg |
|---|---|
| Dimensions | 2.5 × 20.3 × 15.2 mm |
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