Configured for multi‑slot I/O expansion in HC900 and ControlEdge platforms, the Honeywell 2MLR-E12P (2MLR-E12P expansion base) provides mechanical mounting and backplane connectivity for up to twelve hardware modules.
Hardware Specifications
Parameter
Specification
Model
2MLR-E12P
Brand
Honeywell
Origin
USA
Module Capacity
12 modules
Dimensions
481 mm x 98 mm x 19 mm
Current Consumption
220 mA
Weight
0.7 kg (shipping weight 2 kg)
4-20 mA HART Loop Protocol & Channel Isolation Behavior
Although the base itself does not process analog signals, its backplane design maintains stable loop routing for modules that handle 4‑20 mA and HART communication. The mechanical and electrical layout ensures that analog and digital modules installed in adjacent slots retain channel isolation, preventing noise coupling across the rack.
Frequently Asked Questions
Q: Can modules be inserted or removed while the base is powered? A: No. The system must be fully de‑energized before module extraction or insertion to avoid backplane damage.
Q: Does the base impose any limits on mixed module types? A: The base supports mixed installation of analog, digital, and CPU modules, provided total current consumption remains within system supply limits.
Q: Is additional grounding required for the base? A: Standard rack grounding is sufficient. Individual module grounding follows each module’s wiring specification.
Field Installation Guidelines
Mount the base on a rigid panel surface to maintain alignment across all twelve module slots. Ensure backplane connectors remain free of debris before seating modules. Route analog and digital wiring in segregated trays to reduce interference. Maintain single‑point grounding for shielded cables entering modules installed on the base. Verify that total rack current does not exceed the system power supply rating when fully populated.
