GE Fanuc IC655MDL555 / IC655MDL556 Series Five Positive-Logic DC Output Module
Two positive-logic 12–24 VDC outputs balancing 2 A 16-point capacity against 0.5 A 32-point density.
Shared Role, Then Model Differences
IC655MDL555 and IC655MDL556 source current to DC field loads and provide front point indication. The exact part determines current capability and group loading.
IC655MDL555 provides 16 P-MOS FET outputs rated 2 A per point with a 20 A module ceiling. IC655MDL556 provides 32 NPN emitter-follower outputs rated 0.5 A per point with an 8 A module ceiling.
Common Specifications and Model-Specific Data
Sourcing Output Load Study
Use the actual steady-state and inrush values of valves, lamps or relays. Apply point, common and total limits before choosing the higher-density option.
IC655MDL555
Use where 2 A points and 16-channel layout are required.
IC655MDL556
Use for 32 lower-current sourcing loads.
Both
Confirm external 24 VDC capacity and common polarity.
Records to Preserve Before Removal
Step 1
List steady-state and inrush current for each connected load.
Step 2
Confirm sourcing polarity and every group common.
Step 3
Match the exact point count and fuse arrangement before transferring the terminal block.
Technical Questions
Which source-output behavior links IC655MDL555 / IC655MDL556?
Both are Series Five positive-logic DC output modules that source current to field loads.
How does output density trade against point current across IC655MDL555 / IC655MDL556?
IC655MDL555 offers 16 points at 2 A; IC655MDL556 offers 32 points at 0.5 A.
How do total module limits differ for IC655MDL555 / IC655MDL556?
The manual lists 20 A/module for IC655MDL555 and 8 A/module for IC655MDL556.
Do IC655MDL555 / IC655MDL556 have the same switching response?
No. IC655MDL555 is listed at 0.1 ms on/off; IC655MDL556 at 0.1 ms on and 1.0 ms off.
What determines the correct choice between IC655MDL555 / IC655MDL556?
Use load current and inrush, number of outputs, grouping, polarity and project address requirements.
Which source-output load study should be retained for IC655MDL555 / IC655MDL556?
Record point current, inrush, simultaneous group loading and the inductive-load suppression used by the installed circuit.
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