This contact output I/O card provides sixteen relay switching channels. The Yokogawa ADM12 S4 belongs to the Advantum DCS product family. You can control solenoids, motors, and alarm indicators directly. Its electromechanical relays handle both AC and DC loads efficiently.
Physical Dimensions and Hardware Layout
The Yokogawa ADM12 S4 measures 12.5 cm in overall width. Its total depth reaches 15.0 cm including the terminal block. This contact output I/O card weighs approximately 0.52 kg. A metal housing provides excellent shielding against electrical noise. One green LED indicates backplane power status. Additionally, sixteen red LEDs show each channel’s active output state.
Output Specifications and Load Handling
Each output channel uses a Form C (SPDT) electromechanical relay. The Yokogawa ADM12 S4 switches resistive loads up to 2.0A at 250V AC. The relay also handles 2.0A at 30V DC for DC applications. Each relay provides normally open and normally closed contacts. Built‑in snubber circuits protect contacts from inductive load arcing.
| Parameter | Specification |
|---|---|
| Number of Channels | 16 |
| Output Type | Form C relay (SPDT) |
| Contact Configuration | NO and NC contacts per channel |
| Max Load (Resistive AC) | 250V AC, 2.0A |
| Max Load (Resistive DC) | 30V DC, 2.0A |
| Max Load (Inductive AC) | 250V AC, 0.5A |
| Max Load (Inductive DC) | 30V DC, 0.5A |
| Contact Resistance | < 100 mΩ initial |
| Mechanical Life | 10 million operations |
| Electrical Life | 100,000 operations at rated load |
| Operate Time | 10 ms typical |
| Release Time | 5 ms typical |
| Dimensions (W x H x D) | 125 mm x 100 mm x 150 mm |
| Weight | 0.52 kg (1.15 lbs) |
| Terminal Type | Removable 20‑pin screw block |
| Wire Size | 0.2 to 2.5 mm² |
| Number of Terminal Screws | 20 |
| Backplane Current Draw | 250 mA @ 5V DC |
| Power Dissipation | 3.5 W max at full load |
| Internal Energy Storage | 100 µF capacitor for coil hold‑up |
| Isolation Voltage | 1500 Vrms coil‑to‑contacts |
| Protection Features | Snubber circuit per channel |
| LED Indicators | 1 green (power), 16 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 ADM12 S4 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 ADM12 S4 handles AC and DC loads without external suppressors. Use the normally open contact for most switching applications. Use the normally closed contact for fail‑safe functions. Therefore, one card serves multiple control requirements.
Wiring and Installation Guidelines
Connect field loads to the removable 20‑pin screw terminal block. The Yokogawa ADM12 S4 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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