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Configured for discrete signal sensing in RX3i PACSystem platforms, the GE IC694MDL634 (IC694MDL634 Discrete Input Module) provides direct physical/electrical execution. The module captures field inputs across 8 points arranged in 1 group, operating with 24 VDC positive or negative logic to evaluate signal states from switches, pushbuttons, and proximity sensors.

Hardware Specifications

Parameter Specification
Model IC694MDL634
Brand GE Fanuc Emerson
Series RX3i PACSystem
Product Type Discrete Input Modules
Number of Inputs 8 points (1 group)
Rated Voltage 24 VDC (positive or negative logic)
Input Voltage Range 0 to 30 VDC
On-State Voltage / Current 11.5 to 30 VDC / 3.2 mA minimum
Off-State Voltage / Current 0 to 5 VDC / 1.1 mA maximum
Response Time 7 ms typical (On/Off)
Power Consumption 45 mA at 5 VDC bus; 62 mA at 24 VDC user supply
Status Indicators 8 green LEDs (points 1 to 8)
Operating Temp 0 to 60 deg C
Storage Temp -40 to 85 deg C
Relative Humidity 5% to 95% (non-condensing)
Vibration / Shock 1.0 g at 57-500 Hz / 15 G, 11 ms
Dimensions Single-slot RX3i module footprint
Weight 0.34 kg (0.75 lbs)
Origin USA

Backplane Bus Interfacing and Deterministic Networks

The IC694MDL634 interfaces with the RX3i backplane bus to transfer digitized input state tables directly to the controller CPU. Utilizing high backplane bus communication velocity, discrete input updates are processed deterministically within each cycle. Onboard firmware flash compatibility maintains signal timing alignment when scaling I/O density across multi-rack RX3i expansion configurations.

Frequently Asked Questions

Q: What are the backplane and external power requirements for the IC694MDL634?

A: The module draws 45 mA from the internal 5 VDC backplane bus and 62 mA from an external 24 VDC power supply.

Q: Can the IC694MDL634 accept both sinking and sourcing field inputs?

A: Yes, the 8 input points support both positive logic (sinking) and negative logic (sourcing) configurations at 24 VDC nominal.

Q: What are the physical on/off threshold limits for the input signals?

A: An input point registers an On state between 11.5 and 30 VDC (3.2 mA min) and an Off state between 0 and 5 VDC (1.1 mA max).

Field Installation Guidelines

  1. Isolate main backplane power and external 24 VDC field supplies before inserting or removing the module from the baseplate slot.
  2. Fasten an ESD grounding wrist strap to an unpainted grounded metal frame inside the enclosure prior to handling the module assembly.
  3. Align the module housing with the RX3i baseplate slot guides and press firmly until the rear connector seats and the latching mechanism engages.
  4. Wire input field devices to the terminal block, ensuring proper common wire configuration for positive or negative logic operation.
  5. Restore power and verify that the front-panel status LEDs correctly indicate channel input states upon actuation.

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