Technical Specifications

FAQ

1. What is the main function of the GE IC693MDL930E?
The IC693MDL930E is an 8-point isolated relay output module designed for the GE Series 90-30 PLC system. It uses eight normally open relay contacts to switch externally supplied AC or DC loads. Typical applications include controlling solenoid valves, contactors, motor starters, pilot lamps, alarms, and other industrial actuators. Because each output is individually isolated, different output points can be used for loads with different voltage requirements, provided that the electrical ratings and installation requirements are respected.

2. How many relay outputs does the IC693MDL930E provide?
The module provides 8 individually isolated normally open relay outputs. Each output operates as an independent relay contact with its own field-side connection. The individual isolation is useful when the PLC needs to control multiple loads that are electrically separated from one another. Each channel can be evaluated independently during troubleshooting by checking its associated LED status and the actual voltage or continuity at the field terminals.

3. What voltage and current can the IC693MDL930E switch?
The IC693MDL930E supports a wide field operating range of approximately 5–30 VDC or 5–250 VAC at 50/60 Hz. The maximum resistive load is 4 A per output, while the pilot-duty rating is 2 A per output. The total module load is also subject to the specified module and installation limits, including the 20 A maximum applicable to UL installations. Actual load capability can be affected by ambient temperature and the type of load being controlled, so inductive loads should not simply be treated as equivalent to resistive loads.

4. Are the eight outputs on the IC693MDL930E electrically isolated from each other?
Yes. Individual output circuits are isolated from one another, with point-to-point isolation specified at up to 500 VAC. The field side is also isolated from the logic/backplane side, with isolation rated up to 1500 VAC for one minute under the specified test conditions. This arrangement provides greater flexibility when controlling separate external circuits and helps prevent a fault or voltage condition on one field circuit from directly propagating into another output channel or the PLC logic circuitry.

5. Does the IC693MDL930E provide power to the connected field devices?
No. The IC693MDL930E provides relay contacts for switching the load circuit, but the external AC or DC power required by the connected field device must be supplied by the user. For example, when controlling a 24 VDC solenoid, an appropriate external 24 VDC supply must be connected through the relay output circuit. When working with 120/240 VAC loads, the corresponding external supply and suitable protective devices must also be provided according to the installation requirements.

6. What should be checked if an IC693MDL930E output does not activate the connected device?
Start by checking the PLC program and confirming that the corresponding output command is actually being generated. Next, check the LED indicator for the affected channel. If the LED indicates an active output but the load does not operate, measure the field-side voltage and check the external power supply, wiring, terminal connections, and load itself. For a relay contact problem, power should be safely isolated before performing continuity tests. If the control command is present but the relay contact does not switch correctly, the individual relay channel may be worn or damaged and the module may require replacement.

7. Can the IC693MDL930E be used for inductive loads such as solenoids and contactors?
Yes, the module can be used to control industrial loads such as solenoids, contactors, and motor starters, but the load characteristics must be considered carefully. Inductive loads can generate substantially higher switching transients than resistive loads and can reduce relay contact life if suppression is not provided. Appropriate surge suppression, such as a suitable diode for DC coils or an approved RC/varistor suppression device for AC coils, should be considered according to the load and control-circuit design. The 4 A resistive rating should not be interpreted as a universal 4 A rating for every type of inductive load.

8. What should be considered when replacing an IC693MDL930E in a Series 90-30 PLC system?
Before replacement, verify the complete part number and revision, record the existing field wiring, and identify the voltage and load connected to each output. Because this is a high-voltage relay output module, power should be isolated before removing or installing the module. After installation, verify that the terminal wiring matches the required circuit arrangement and that the external field supply is correct. Once the PLC is returned to operation, test each required output individually and confirm the corresponding LED indication, relay switching, field voltage, and connected load operation. For older Series 90-30 installations, it is also important to check the condition of the rack connector and terminal wiring because intermittent connections can produce symptoms that resemble a failed output module.