This contact input module captures sixteen channels of 24V DC field signals. The Yokogawa ADM12T belongs to the Advantum DCS product family. You can connect proximity sensors, limit switches, and pushbuttons directly. Full channel isolation provides superior protection against ground loops.
Physical Dimensions and Hardware Layout
The Yokogawa ADM12T measures 12.5 cm in overall width. Its total depth reaches 15.0 cm including the terminal block. This contact input module weighs approximately 0.46 kg. A metal housing provides excellent shielding against electrical noise. One green LED indicates backplane power status. Additionally, sixteen yellow LEDs show each channel’s active input state.
Electrical Input Specifications
Each input channel operates at 24V DC nominal voltage. The Yokogawa ADM12T provides a typical input resistance of 4.7 kΩ. Channel turn‑on voltage requires a minimum of 19V DC. Conversely, turn‑off voltage occurs below 9V DC. The module features per-channel optical isolation. Each channel has its own isolated return path.
| Parameter | Specification |
|---|---|
| Number of Channels | 16 |
| Input Type | Sink (NPN) or source (PNP) configurable |
| Nominal Voltage | 24V DC |
| Input Voltage Range | 19.2V to 28.8V DC |
| On‑State Threshold | ≥ 19V DC |
| Off‑State Threshold | ≤ 9V DC |
| Input Resistance | 4.7 kΩ typical |
| Input Delay (On→Off) | 2 ms typical |
| Input Delay (Off→On) | 2 ms typical |
| Dimensions (W x H x D) | 125 mm x 100 mm x 150 mm |
| Weight | 0.46 kg (1.01 lbs) |
| Terminal Type | Removable 20‑pin screw block |
| Wire Size | 0.2 to 2.5 mm² |
| Number of Terminal Screws | 20 |
| Backplane Current Draw | 190 mA @ 5V DC |
| Power Dissipation | 1.4 W typical |
| Internal Energy Storage | 68 µF capacitor for status retention |
| Isolation Voltage | 1500 Vrms per channel |
| Common Mode Rejection | 70 dB at 50/60 Hz |
| Number of Components | 1 main board, 16 optocouplers |
| LED Indicators | 1 green (power), 16 yellow (channels) |
| Operating Temperature | -10°C to +60°C |
Energy Storage and Input Stability
Internal capacitors maintain input status during brief power dips. The Yokogawa ADM12T stores channel states for up to 12 ms. This storage prevents false triggering during short interruptions. Consequently, the DCS reads stable input values at all times.
Per-Channel Isolation Benefits
Each input channel has complete electrical isolation from others. The Yokogawa ADM12T allows each channel to connect to different voltage commons. This feature eliminates ground loop problems entirely. Therefore, you can mix signals from various power zones safely.
Noise Immunity and Filtering
This module includes hardware filters for electrical noise rejection. The Yokogawa ADM12T rejects voltage spikes shorter than 1 ms. The input delay includes the filter time automatically. Therefore, false triggers rarely occur in noisy industrial environments. Each channel’s isolation also blocks common-mode noise.
Wiring and Installation Guidelines
Connect field devices to the removable 20‑pin screw terminal block. The Yokogawa ADM12T accepts solid or stranded wires from 0.2 to 2.5 mm². Connect each channel’s return to its dedicated negative terminal. Do not tie channel commons together externally. Proper grounding improves system reliability significantly.
Details
| Weight | 0.7 kg |
|---|---|
| Dimensions | 2.5 × 20.3 × 15.2 mm |
Reviews
There are no reviews yet.