The General Electric IC697MDL241, also cataloged as the IC697MDL241 Discrete Input Module, operates as a dedicated hardware component for isolated 240 VAC discrete signal acquisition within Series 90-70 PLC chassis systems. The module processes field signals from pushbuttons, limit switches, and proximity switches across 16 individually isolated input points. Featuring capacitive input circuitry to limit internal thermal dissipation, each point includes a 20 ms input filter time to suppress field contact bounce and electrical line noise.
Hardware Specifications
| Parameter | Specification |
|---|---|
| Model | IC697MDL241 |
| Brand | General Electric |
| Origin | USA |
| Weight | 0.57 kg |
| Dimensions | Standard Series 90-70 Single-Slot Form Factor |
| Operating Temp | 0 to 60 deg C |
| Power Consumption | 0.25 A from 5 VDC backplane |
| Operating Voltage | 240 VAC (60 Hz) |
| Input Points | 16 points (Individually Isolated) |
| On-State Current | 10 mA typical |
| Off-State Current | 5 mA maximum leakage current |
| Input Filter Time | 20 ms |
| Status Indicators | 16 Logic-side status LEDs |
I/O Density Scaling & Backplane Bus Integrity
The IC697MDL241 integrates into the Series 90-70 parallel backplane architecture without requiring physical DIP switches or manual jumpers for address allocation. Software-driven I/O reference mapping simplifies system expansion and maintains backplane bus communication velocity across high-density I/O chassis layouts. The capacitive input network limits current draw while maintaining compliance with IEC reactive current-voltage characteristics, ensuring reliable interoperation with 2-wire and 3-wire AC proximity switches without causing false logic states or compromising backplane firmware flash compatibility.
Frequently Asked Questions
Q: How is the IC697MDL241 module addressed and configured within the host PLC system?
A: Software configuration eliminates physical switches or jumpers. I/O reference assignment is completed directly via the programming software connected through the CPU SNP port or Ethernet TCP/IP interface.
Q: Are the 16 AC input channels connected to a shared common terminal?
A: No. All 16 channels are individually isolated, allowing each point to be wired to independent 240 VAC power source phases or separate control circuits within the system.
Q: Can the IC697MDL241 be safely replaced with a different module type in the same rack slot?
A: Mechanical keying on the chassis slot prevents insertion of incorrect module types, protecting both backplane logic and field wiring from voltage mismatch.
Field Installation Guidelines
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Power Isolation: Disconnect primary system power and field-side 240 VAC supply lines before inserting, removing, or wiring the module.
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Mechanical Insertion: Align the module circuit board with the chassis card guides. Press firmly until the module seats into the backplane connector and latch the retaining mechanism securely.
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Field Wiring: Connect individual 240 VAC field inputs to their designated terminal block points. Ensure proper strain relief and maintain separation between high-voltage AC field wiring and low-voltage DC communication lines.
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Leakage Current Verification: Verify that connected 2-wire proximity sensors do not exceed the 5 mA off-state leakage threshold to prevent false-ON logic detection by the capacitive input circuit.
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Keying Alignment: Verify that the mechanical keying on the module matches the slot receiver to prevent accidental insertion into incompatible rack positions.
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