A DCS Q Co., Ltd. - PLC and DCS Industrial Control Equipment Wholesale
Introduction
The Honeywell 2MLI‑D28A is a 64‑point DC 24 V digital input module designed for high-density industrial automation applications within the MasterLogic‑200 PLC family. With its ability to handle a large number of discrete input signals from sensors, switches, and contact closures, this module enables complex control systems to operate efficiently while maintaining robust signal integrity. Its sink/source configurable inputs, coupled with optical isolation, ensure reliable and noise-resistant operation in challenging industrial environments. Ideal for large-scale manufacturing, process control, and machine automation, the 2MLI‑D28A is built to simplify wiring, save rack space, and deliver consistent performance.
Technical Specifications
| Parameter | Details |
|---|---|
| Input Channels | 64 discrete DC input points |
| Input Type | Sink or Source (DC 24 V) |
| Operating Voltage Range | DC 20.4 V – 28.8 V |
| ON Threshold | ≥ 19 V DC and ≥ 3 mA |
| OFF Threshold | ≤ 11 V DC and ≤ 1.7 mA |
| Input Resistance | Approx. 5.6 kΩ |
| Response Time (configurable) | 1 ms / 3 ms / 5 ms / 10 ms / 20 ms / 70 ms / 100 ms — default 3 ms |
| Isolation Method | Photo‑coupler isolation for noise immunity |
| Isolation Voltage | AC 560 V rms for 3 cycles (altitude ≤ 2000 m) |
| Common / COM Wiring | 64 points sharing a common COM line (sink/source selectable) |
| Current Consumption (module) | Approx. 95 mA |
| Connection Method | 72‑point terminal block, twisted pair 0.3–0.75 mm² |
| Status Indicator | LED per input channel (lights when input is ON) |
| Ambient Operating Temperature | 0 °C to +55 °C |
| Module Weight | Approx. 0.18 kg |
| Mounting | Standard MasterLogic‑200 rack slot |
