Honeywell 2MLI-D22A MasterLogic-200 Digital Input Module
Configured for DC 24 V discrete signal acquisition in MasterLogic-200 systems, the Honeywell 2MLI-D22A (2MLI-D22A digital input module) provides direct electrical input processing across a 16‑point current source/sink topology.
Hardware Specifications
Parameter
Specification
Model
2MLI-D22A
Brand
Honeywell
Origin
USA
Weight
Not specified (shipping weight 2 kg)
Dimensions
Not specified
Operating Temp
0 to 55 deg C
Power Consumption
Not specified
Core Performance Indicators
DC 24 V input, 16-point current source/sink, environmental tolerance (humidity 5–95% RH), contamination level below 2
4-20 mA HART Loop Interaction & Channel Isolation Behavior
Although the 2MLI-D22A processes discrete DC 24 V signals rather than analogue loops, its input circuitry maintains stable reference behavior when installed alongside Honeywell modules interfacing with 4-20 mA HART loop protocol devices. The module’s current source/sink design minimizes backplane noise coupling, preserving channel-to-channel isolation in adjacent analogue modules. Environmental specifications such as humidity tolerance and contamination limits support predictable loop integrity across mixed-signal racks.
Frequently Asked Questions
Q: Can the 2MLI-D22A be hot-swapped A: No. Module insertion or removal must be performed with the system de‑energized.
Q: Does the module support both current source and current sink inputs A: Yes. The 16 points accept DC 24 V signals in either sourcing or sinking configuration.
Q: Are there altitude or environmental restrictions A: Yes. Operation is specified below 2000 m and in environments without corrosive gas or dust.
Field Installation Guidelines
Maintain separation between DC 24 V input wiring and high-current conductors to reduce induced noise. Use proper shielding and grounding practices when routing discrete signals near analogue loops. Ensure terminal blocks are fully seated and verify environmental conditions remain within specified temperature, humidity, and contamination limits. Avoid sharp cable bends to maintain mechanical integrity at the input terminals.
