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RX3i MDL634 Digital I/O

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SKU 2171121  UPC 0218618148643


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Other Available Revisions for the IC694MDL634 IC694MDL634AIC694MDL634BIC694MDL634-LT

Common misspellings:
  • 1C694MDL634
  • IC69AMDL634
  • IC694MD1634
  • IC694MDL63A
  • IC694MDL634

Product Description

The GE Fanuc IC694MDL634 is a 24 VDC 8-point POS/NEG Logic Input Module that belongs to the Rx3i PACSystem series. The required power supply to run this module is 24 VDC. It deploys eight inputs that can be driven by negative or positive logic. When used with positive logic, it sinks current from a device to the user common. The opposite happens when the module is used with negative logic.

Positive logic input modules sink current from the input device to the user common or negative power bus.  The input device is connected between the positive power bus and the input terminal. The GE Fanuc IC694MDL634 has eight inputs, which receive current from a single power source. This source is 24 VDC and can provide power to devices that connect to the module. When IC694MDL634 is connected to an expansion backplane of a PLC system, its power source comes from the backplane. However, an external +24 VDC supply is needed when the module connects to a universal backplane. Among the devices that are compatible with the inputs are pushbuttons, limit switches, and electronic proximity switches.

The IC694MDL634 has eight indication LEDs that correspond with each input. Those inputs are referring to terminals 2 to 9 of a total of 20 terminals on the module. A blue label helps the user identify the device as a low voltage module. Any slot of the RX3i system can be used to connect to this module as it is fully compatible with the series. 

Technical Specifications

Rated Voltage: 24 volts DC
# of Inputs: 8 (1 group)
Freq: N/A
Input Current: 7 mA
Input Voltage Range:   0 to +30VDC
Power Consumption:   45 mA from 5V bus, 62 mA from 24V supply 


Technical Information


Rated Voltage

24 Vdc

Input Voltage Range

0 to +30 Vdc

Inputs per Module

8 (one group with a  single common)

Isolation: Field to Backplane (optical) and to  frame ground

250 Vac continuous; 1500 Vac for one minute

Input Current

7 mA (typical) at rated voltage

Input  Characteristics


On–state Voltage

11.5 to 30 Vdc

Off–state Voltage

0 to +5 Vdc

On–state Current

3.2 mA minimum

Off–state Current

1.1  mA maximum

On  response Time

7 ms typical

Off  response Time

7 ms typical

Power  Consumption: 5Vdc

45 mA (all inputs on) from 5Vdc bus on backplane

Power  Consumption: 24Vdc16

62 mA from the Isolated 24Vdc backplane bus or from user supplied power


Troubleshooting IC694MDL634

Troubleshooting information is available on IC694MDL634's website page; it also includes a datasheet user-manual and a wiring diagram.


Repair your IC694MDL634

PDF Supply can repair your IC694MDL634 in 3-5 business days. And PDF Supply stands by all of its repairs with a 1 year customer satisfaction warranty.

Customer Questions and Answers

  • Question:  What is an IC694MDL634?  Answer:  The IC694MDL634 is an 8-Point, Positive/Negative Logic, 24 VDC, Input module from the GE Fanuc RX3i Series. 
  • Question:  What does IC694MDL634 provide?  Answer:  This module provides 8 input points in 1 group with a common power input terminal. 
  • Question:  How can the module be wired?  Answer:  This module can be wired for either positive or negative logic.
  • Question:  With what are the input characteristics compatible?  Answer:  The input characteristics are compatible with a wide range of input devices, such as pushbuttons, limit switches, and electronic proximity switches. 
  • Question:  Current into an input point results in what?  Answer:  Current into an input point results in a logic 1 in the input status table (%I).
  • Question:  By what power do field devices operate?  Answer:  Power to operate field devices can be supplied by the user.
  • Question:  Eight green LEDs indicate what?  Answer:  Eight green LEDs indicate the ON/OFF status of points 1 through 8. 
  • Question:  The blue bands on the label let you know what?  Answer:  They let you know that IC694MDL634 is a low-voltage module.
  • Question:  Into what slot can IC694MDL634 be installed?  Answer:  This module can be installed in any I/O slot of an RX3i system. 
  • Question:  What should I do if my IC694MDL634 is not working properly?  Answer:  Your IC694MDL634 may need repair

For more information on the IC694MDL634 8-Point, Positive/Negative Logic, 24 VDC, Input Module of the GE Fanuc RX3i Series, please see the Datasheet User-Manual

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