GE IC693ALG391 2‑Channel Analog Current Output Module

Description

Basic Hardware Information

‑ Output channels: 2 single‑ended current‑only analog outputs ‑ Output range: Hardware jumper selectable 0‑20 mA / 4‑20 mA per channel ‑ DAC resolution: 12‑bit; step size 4 μA (4‑20 mA), 5 μA (0‑20 mA) ‑ Full‑channel update time: 5 ms typical for both channels ‑ Accuracy: ±0.1 % full‑scale @25 ℃; ±0.25 % full‑scale across full operating‑temperature range ‑ Maximum loop load resistance: 850 Ω per channel ‑ Short‑circuit protection: Built‑in per‑channel hardware short‑circuit shutdown protection ‑ Galvanic isolation: 1500 V RMS 1‑minute dielectric withstand between field analog circuits and PLC logic backplane; no channel‑to‑channel isolation ‑ Power consumption: 30 mA @5 VDC backplane logic power; 215 mA @24 VDC external isolated field‑side power ‑ Termination: Detachable screw‑type terminal block ‑ Mechanical: Single‑slot Series 90‑30 form‑factor, baseplate mounting; non‑hot‑swappable, rack main power must be removed for module replacement ‑ Status indicators: Front‑panel OK LED for module health status ‑ Operating ambient temperature: 0 ℃ ~ +60 ℃; storage temperature ‑40 ℃ ~ +85 ℃; relative humidity 5‑95 % non‑condensing ‑ Handling note: ESD‑sensitive hardware; anti‑static wrist‑strap required during maintenance ‑ Compatibility: Works with Series 90‑30 CPU family; incompatible with Series 90‑70 and VersaMax racks.

Core Functions & Features

1. Converts digital values stored in PLC %AQ analog‑output registers into industry‑standard 0‑20 mA /4‑20 mA loop‑current signals for proportional valves, positioners and analog actuator set‑point control.
2. Terminal‑block jumpers independently set current‑range for each channel, supporting mixed‑range field‑device requirements.
3. Per‑channel self‑reset short‑circuit hardware protection; cuts off output drive under short‑circuit fault to avoid internal driver damage.
4. Detachable terminal‑block design keeps field wiring intact while swapping module, shortens maintenance downtime.
5. Revision‑F /‑G units are direct drop‑in replacements for older IC693ALG391 hardware; no wiring or software modification required after replacement.

On‑site Installation & Commissioning Notes

1. Power‑off complete Series 90‑30 rack before installing or removing IC693ALG391; apply anti‑static protection. Fully seat module into baseplate slot until locking tab clicks firmly into place.
2. Use shielded twisted‑pair cables for analog field wiring; separate analog signal cables from high‑voltage AC and heavy‑power discrete wiring to reduce EMI interference; single‑point shield grounding is recommended. Torque terminal‑block screws to specified torque value.
3. Configure terminal‑block jumpers to match actual field‑device current‑range requirements. Supply stable 24 VDC external isolated power to module terminals and verify correct polarity.
4. Complete hardware slot configuration within PLC programming software, assign slot module‑type as IC693ALG391, download configuration to CPU.
5. After commissioning, verify steady‑on OK‑LED status. Perform output‑signal test for each channel, validate current‑output range and response performance; simulate short‑circuit condition to verify protective‑shutdown function.
6. Replacement note: Voltage‑output analog modules such as IC693ALG390 cannot serve as direct substitute. After replacement, double‑check jumper‑range settings and external 24 VDC power‑supply, execute full‑point analog‑channel test.

Common On‑site Abnormal Conditions

‑ Module OK‑LED off after power‑on: Poor module seating on baseplate socket, baseplate backplane power abnormality, missing / reversed external 24 VDC field‑side power, internal module hardware failure. ‑ Zero output on both channels: Loss of external 24 VDC drive‑power, incorrect hardware‑configuration download. ‑ Single‑channel no output: Field‑side short‑circuit triggering channel‑protection shutdown, loose terminal‑block screw contact, internal DAC‑driver damage. ‑ Output saturated high/low: %AQ register value out of valid range, actual loop load resistance exceeds maximum 850 Ω specification. ‑ Analog output drift / offset: Cabinet ambient‑temperature exceeds rated operating range, heavy electromagnetic‑interference. ‑ Intermittent output deviation: Vibration‑induced loose terminal‑block contact, unstable external 24 VDC power‑supply.