Emerson IC694MDL660 RX3i 32-Point DC Input Module
A 24 VDC, thirty-two-point positive/negative logic input module with configurable input filtering.
Product Profile
IC694MDL660 is a PACSystems RX3i discrete input module with thirty-two 24 VDC input points. It accepts positive or negative logic wiring and allows the input on/off filter to be selected from 0.5 to 100 ms.
IC694MDL660 requires the field-voltage scheme, commons, terminal wiring and configured filter values to be preserved. Filter settings can change how the application responds to bounce or short pulses even when the electrical wiring is correct.
Technical Data
| Manufacturer | Emerson / GE Fanuc |
|---|---|
| Model | IC694MDL660 |
| Product Family | PACSystems RX3i |
| Product Type | DC voltage input module |
| Input Points | 32 |
| Nominal Input Voltage | 24 VDC |
| Field Voltage Range | 20 to 30 VDC |
| Logic Type | Positive or negative logic |
| On-State Threshold | Greater than 11.5 VDC |
| Input Filter | Selectable on/off delay from 0.5 to 100 ms |
| Backplane Current | 300 mA at 5 VDC |
| Compliance | UL 508; equivalent CSA C22.2 No. 142-M1987 |
| Hazardous Location | Class I, Division 2, Groups A, B, C and D when installed to applicable requirements |
| Mounting Context | PACSystems RX3i modular system |
| Configuration Requirement | Filter time and input mapping stored in the controller hardware configuration |
System Role
- Conditions thirty-two field status signals for the RX3i controller.
- Allows positive- or negative-logic wiring to fit the engineered field circuit.
- Uses configurable filtering to balance noise rejection and response time.
- Reports point states through the RX3i rack and controller configuration.
Compatibility
- Confirm the rack, baseplate, controller firmware and PAC Machine Edition hardware catalog.
- Preserve terminal numbering, common grouping and field polarity.
- Copy every channel filter value from the active project.
- Do not infer compatibility from another IC694MDL part number with a different voltage or point count.
Applications
- Proximity switches, limit switches and relay contacts in 24 VDC control circuits.
- Machine status and interlock inputs requiring adjustable filtering.
- RX3i cabinet expansion or like-for-like field replacement.
FAQ
Why can an IC694MDL660 replacement miss short pulses that the old module detected?
The input filter may have been restored to a longer value; compare every configured channel delay with the approved project.
What wiring details are needed to quote IC694MDL660?
Provide the terminal arrangement, positive or negative logic scheme, field supply, commons, point list and photographs of the existing module and terminal block.
Can IC694MDL660 accept 48 VDC field signals?
No. IC694MDL660 is specified for a nominal 24 VDC system with a 20 to 30 VDC field range.
How should IC694MDL660 be tested without creating false machine actions?
Use an approved input simulation plan, isolate dependent outputs as required and verify each field point through controller logic and HMI indication.
What should be checked when several IC694MDL660 channels fail together?
Inspect the shared field supply, commons, terminal connection, rack power and configuration before replacing individual sensors or the module.
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