GE-FanucIC610MDL154ASeries One 4-Circuit DC Output Module, 5–24 VDC 2 A per Point, Individually Isolated and Individually Fused, Sink or Source

Product Description

What this part is

This is a 24 VDC, 2 A output module for the GE Fanuc Series One family of programmable logic controllers. It provides four output points, each on its own isolated and separately fused circuit, driven from the Series One backplane and wired out through a screw terminal block on the faceplate. It is one of the better-documented modules in the Series One range, which means for once we can give you real numbers rather than hedging.

Sink or source — the wiring decides, not the module:
The IC610MDL154A is a sink/source module. Whether a given circuit sinks or sources is determined by how the field load is wired relative to the DC supply, not by anything internal to the module.

In a sourcing arrangement the module supplies the positive side to the load and the load returns to 0 V — the module sits between supply positive and the device. In a sinking arrangement the load is fed positive directly from the supply and the module switches the return path to 0 V. Same module, same terminal, different external wiring, opposite polarity convention. This matters because plant standards differ, imported machinery often assumes one convention and domestic panels the other, and a module labelled source-only gets rejected on paper by engineers who need sinking outputs.

Because all four circuits are individually isolated, some circuits can be wired sinking and others sourcing on the same card, referencing different supplies. That flexibility is a genuine reason to specify this module.

Decoding the order code

IC610: GE Fanuc Series One product line, distinct from IC630 Series Three, IC600 Series Six and IC693 Series 90-30.

MDL: discrete I/O module.

154: 24 VDC 2 A four-circuit output, individually isolated and fused.

A: hardware revision letter, the commonly traded revision.

Also written IC610-MDL-154-A, IC610 MDL 154 A and IC610MDL154.

Published ratings

Operating voltage: 5–24 VDC, nominal 24 VDC.

Output current: 2 A continuous per point, 8 A peak maximum.

Points: 4 outputs, 4 individually isolated circuits.

Isolation: each circuit may reference a different DC power source.

Fusing: 5 A replaceable fuse per circuit, four total.

Off-state leakage: less than 0.4 mA at 40 VDC.

Backplane load: 12 mA at 9 VDC (2 unit loads) / 30 mA at 9 VDC (3 unit loads).

Status indication: per-circuit LEDs on the logic side.

Terminals: faceplate screw terminal block, each terminal accepts two #14 AWG or one #12 AWG.

Paralleling: outputs may be paralleled to increase available current.

Temperature derating: the 2 A on the nameplate is not always available:
This is the specification most often ignored and it materially affects how the module is sized. The published derating runs as follows: at 10 °C, three circuits at 4 A; at 40 °C, one circuit at 4 A; at 50 °C, four circuits at 2 A; at 60 °C, two circuits at 2 A.

At 60 °C only two of the four circuits can carry the nameplate 2 A simultaneously. A panel running hot — no active cooling, summer ambient, drives dumping heat into the same enclosure — is not a place to load all four outputs to their rating. Four circuits at 2 A each requires an internal panel temperature at or below 50 °C, which is a ventilation question, not a module question. The failure mode when this is missed is nuisance fuse operation in July and a maintenance team chasing a fault that is really a thermal design problem.

Off-state leakage and cascaded logic inputs

Leakage is specified at under 0.4 mA at 40 VDC, which is low. In practical terms it is well below the current needed to hold in any normal contactor or relay coil, so a de-energised output stays de-energised. The exception worth knowing about is feeding this output into another high-impedance logic input rather than into a real load. A few hundred microamps into a high-impedance input can register as a true state, which is the case where the receiving input’s off-state threshold governs.

Fusing and isolation as maintenance features

Each of the four circuits carries its own 5 A replaceable fuse. That is a real advantage over modules with a single common fuse or no field-replaceable protection: a short on one output takes out one circuit, not the card, and the repair is a fuse from the drawer rather than a module from a surplus dealer. Combined with per-circuit isolation and per-circuit status LEDs, fault-finding on this module is quick — the LED tells you what the logic commanded, the fuse tells you what the field did.

Eight references for four outputs

This module occupies eight consecutive discrete output references in the Series One reference map while providing only four physical outputs. The four references that have no terminal behind them are not wasted: they are usable as internal coils in the program. A rack laid out on the assumption of one reference per point will run out of address space before it runs out of slots.

Quantity and configuration

Module only, sold individually, one card per purchase. The faceplate screw terminal block is part of the module. The Series One rack or base, CPU, rack power supply, field DC supply, spare fuses and field wiring are ordered separately.

Platform compatibility

This module is for GE Fanuc Series One and Series One Plus controllers. Series One Junior uses a fixed, non-expandable I/O configuration. The photographs on this listing show the actual faceplate terminal block.

Interchange guidance

Search forms include IC610MDL154A, IC610MDL154, IC610-MDL-154-A and IC610 MDL 154. Obsolete and discontinued with no factory replacement — Series One was retired well before the Emerson acquisition of GE Intelligent Platforms. Reman modules and board-level repair services remain available. Series One, Series Three, Series Six and Series 90-30 share no modules; an IC630, IC600 or IC693 number will not fit a Series One rack.