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The GE IC693MDL655, also cataloged as the IC693MDL655 Discrete Input Module, operates as a dedicated hardware component for binary state monitoring within Series 90-30 platforms. The high-density component interfaces field-side switches, pushbuttons, and proximity sensors across the backplane by converting 24 VDC nominal voltage inputs into logic-level status bits.

Hardware Specifications

Parameter Specification
Model IC693MDL655
Brand GE Fanuc Emerson
Origin USA
Weight 0.28 kg (0.63 lbs)
Dimensions Single-slot baseplate profile
Operating Temp 0 to 60 deg C
Power Consumption 195 mA @ 5 VDC (backplane bus); 224 mA @ 24 VDC
Input Channel Count 32 points (Arranged in 4 isolated groups of 8 channels)
Nominal Input Voltage 24 VDC
Input Voltage Range 0 to 30 VDC
Logic Configuration Positive / Negative logic (Sink / Source)
Nominal Input Current 7 mA per channel @ 24 VDC
On-State Threshold 11.5 to 30.0 VDC (3.2 mA minimum current)
Off-State Threshold 0 to 5 VDC (1.1 mA maximum current)
Signal Filter Delay 2 ms maximum (On / Off typical response)
Isolation Breakdown 1500 V between field circuits and logic side via optocouplers
Front Panel Interface 2x male 24-pin Fujitsu FCN-365P024-AU connectors

Industrial Control and Network Determinism

The IC693MDL655 utilizes fixed internal optocoupler configurations to transfer signal states safely to the logic bus without introducing propagation delays or compromising backplane bus communication velocity parameters. The 32-point high-density layout enables predictable I/O density scaling profiles across local, expansion, or remote 5-slot and 10-slot baseplates. The integrated firmware flash compatibility ensures synchronized processing blocks, allowing all four discrete groups to update within defined scan limits while driving front-panel status LEDs (A1-A8, B1-B8, C1-C8, D1-D8) without loop timing jitter.

Frequently Asked Questions

Q: How is the physical wiring executed given the high density of the input channels?

A: The front panel lacks standard screw terminals. Connections are routed through two pre-mounted male 24-pin Fujitsu FCN-365P024-AU connectors, requiring the use of matching pre-wired cables such as the IC693CBL327 or IC693CBL328.

Q: Can different electrical logic types be mixed across the four separate input groups?

A: Yes. Because the 32 channels are partitioned into four distinct isolated groups of eight points (Groups A, B, C, and D), each independent group can be wired for either positive logic (sink) or negative logic (source) independently.

Field Installation Guidelines

  • Connector Attachment Security: Fully seat the female cable sockets onto the front-panel Fujitsu male headers and secure the mechanical latches to prevent intermittent channel connections from physical vibration.
  • Shield Grounding Matrix: Connect the braided shield of the pre-wired signal cables directly to the master chassis enclosure earth terminal to prevent high-frequency noise from corrupting the 2 ms signal filter response.
  • Chassis Slot Assignment: Seat the single-slot module into any available I/O slot on a compatible Series 90-30 baseplate. Do not install the module into Slot 1, which is reserved exclusively for the CPU.

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