This digital input module captures sixteen channels of 24V DC field signals. The Yokogawa ADM11T belongs to the Advantum DCS product family. You can connect proximity sensors, limit switches, and pushbuttons directly. Its robust design ensures reliable operation in industrial environments.
Physical Dimensions and Hardware Layout
The Yokogawa ADM11T measures 12.5 cm in overall width. Its total depth reaches 15.0 cm including the terminal block. This digital input module weighs approximately 0.44 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 ADM11T provides a typical input resistance of 3.9 kΩ. Channel turn‑on voltage requires a minimum of 19V DC. Conversely, turn‑off voltage occurs below 9V DC. Built‑in optical isolation protects the backplane from field wiring faults. The module divides inputs into two isolated groups of eight channels.
| 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 | 3.9 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 | 0.44 kg (0.97 lbs) |
| Terminal Type | Removable 20‑pin screw block |
| Wire Size | 0.2 to 2.5 mm² |
| Number of Terminal Screws | 20 |
| Backplane Current Draw | 180 mA @ 5V DC |
| Power Dissipation | 1.3 W typical |
| Internal Energy Storage | 68 µF capacitor for status retention |
| Isolation Voltage | 1500 Vrms channels‑to‑backplane |
| Common Mode Rejection | 60 dB at 50/60 Hz |
| Number of Components | 1 main board, 1 optocoupler array |
| 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 ADM11T 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.
Noise Immunity and Filtering
This module includes hardware filters for electrical noise rejection. The Yokogawa ADM11T rejects voltage spikes shorter than 1 ms. The input delay includes the filter time automatically. Therefore, false triggers rarely occur in noisy industrial environments.
Isolation and Channel Grouping
This module groups inputs into two isolated banks of eight channels. Each bank shares a common return terminal. The Yokogawa ADM11T withstands 1500Vrms between banks and the backplane. This design protects the main controller from field wiring faults. You can connect different commons to each bank independently.
Wiring and Installation Guidelines
Connect field devices to the removable 20‑pin screw terminal block. The Yokogawa ADM11T accepts solid or stranded wires from 0.2 to 2.5 mm². Connect the common return for each input bank separately. Proper grounding reduces electrical noise significantly. Label each wire clearly for future maintenance.
Details
| Weight | 0.7 kg |
|---|---|
| Dimensions | 2.5 × 20.3 × 15.2 mm |
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