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SKU 2178469  UPC 0799705795242

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Common misspellings:
  • 1C693ALG221
  • IC693A1G221
  • IC693ALG22l
  • IC693ALG221

Technical Specifications for IC693ALG221

ManufacturerGE Fanuc
SeriesSeries 90-30
Part NumberIC693ALG221
Product TypeInput Module
Module TypeAnalog Input Module
Number of Inputs4
Jumper Input ControlSupported
Number of Jumpers2
Accuracy Rating0.1% at Full Scale
Current ranges0 to 20 mA, 4 to 20 mA

Product Description

IC693ALG221 is an Analog Current Input Module with four input channels for the Series 90-30 Programmable Logic Controller. This controller’s channels are each capable of converting an analog input signal into a digital signal as needed for the application. Two input ranges are available with a default of 4 to 20 mA with scaled user data so 4 mA corresponds to a count of zero and 20 mA to 32000. Each 1000 count represents 0.5 mA. If a jumper is added to the I/O terminal board, the input range is adjusted to 0 to 20 mA with scaled user data scale corresponding to a count of 32000 with each 800 count equal to 0.5 mA. This module is equipped with two range jumpers:  one for channels 1-2 and one for channels 3-4.

The IC693ALG221 input module allows conversion speed of one half milliseconds for each of the channels with an update rate of two milliseconds for any of the provided channels. Resolution speed on a converted signal is 12 bits over either chosen range. Percent AI user data registers in 16 bit 2’s complement format. If the current source is reversed into the input, the module will output a data word that parallels to the low end of the range.

Input protection for the IC693ALG221 is sufficient to work with reduced performance with up to 200 V in common mode settings. This module also allows electrical isolation of external noise. All field connections require a good grade twisted, shielded instrumentation cable connected to the COM or GND. An LED indicator monitors power supply operation. The main power source specific to the IC693ALG221 is +24 VDC supplied PLC power routed through an inverter for the module. IC693ALG221 uses power from the +5 VDC output to drive isolation circuitry. 

Technical Specifications

No. of channels: 4 Inputs
Input Current  Range: 4 to 20 mA and 0 to 20 mA
Calibration: Factory calibrated to 4 µA per count
Update Rate: 2 msec (all 4 channels)
Input Filter Response: 325 Hz
Power Consumption: 25 mA from +5V bus and 100mA from +24V bus



The IC693ALG221 input module from GE Fanuc is an analog input module that comes with 4 inputs. It is a member of the GE Fanuc Series 90-30 product line. One of the most common applications for the IC693ALG221 input module is to use it to convert analog input signals into digital signals that can be used by digital applications. This input module can operate with 2 different current ranges which are 0 to 20 milliamps or 4 to 20 milliamps. The 4 input channels only take approximately 2 milliseconds to update. The resolution of the inputs is 4 microamps at 4 to 20 milliamps, and it is 5 microamps 0 to 20 milliamps. The IC693ALG221 input module features an accuracy rating 0.1% at the full scale.


The GE Fanuc IC693ALG221 analog input module consumes about 25 milliamps of power at a voltage rating of 5 Volts DC and it consumes about 100 milliamps of power at a voltage rating of 24 Volts DC when it is in operation under normal conditions. It can be installed in virtually any available rack in a GE PLC system. The PLC will supply the IC693ALG221 input module with its required power. The inputs on this module are labeled with the number 1 to 4. The operators of the module can select which channels that they want to use with the 2 range jumpers that are connected to the input module. One of the range jumpers is for input channels 1 and 2 and the other jumper is for input channels 3 and 4.

Technical Information


Input Current Ranges

4 to 20 mA and 0 to 20 mA


Factory calibrated to 4 mA per count

Update Rate

2 msec (all four channels)

Resolution at 4-20 mA

4 mA (1 LSB = 4 mA)

Resolution at 0-20 mA

5 mA (1 LSB = 5 mA)

Absolute Accuracy t

0.1% full scale + 0.1% reading

Common Mode Voltage

200 volts


< 1 Least Significant Bit


1500 volts between field side and logic  side

Common Mode Rejection

> 70 db at DC; >70 db at 60 Hz

Cross-Channel Rejection

> 80 db from DC to 1 kHz

Input Impedance

250 ohms

Input Filter Response

325 Hz

Internal Power Consumption

100 mA from the isolated +24 volt supply


25 mA from+5 volt bus on the  backplane


Troubleshooting IC693ALG221

Troubleshooting information is available on IC693ALG221's website page; it also includes a datasheet user-manual and a wiring diagram.  

Repair your IC693ALG221

PDF Supply can repair your IC693ALG221 in 3-5 business days. And PDF Supply stands by all of its repairs with a 1 year customer satisfaction warranty.


Procedure for IC693ALG221 Field Calibration

●   What you will need:

❍   Variable Power Supply capable of +5 VDC.

❍   Calibrated DVM capable of displaying +5 VDC +/- 0.1mV.

❍   IBM PC / Compatible running LM90 or a HHP. ❍   Non-Conductive Potentiometer adjuster.

1.    Power off the 9030 PLC that has the analog card that is in need of calibration.

2.    Remove any field wiring.

3.    Wire terminals 1 and 2 together (0-20mA range jumper for channels 1&2). Wire terminals 11 and 12 together (0-20mA range jumper for channels 3&4). Connect channel 1 terminals 3 and 5 to the positive and negative side of your Variable Power Supply respectively.

4.    Connect the DVM Voltage input and Common leads to the corresponding output terminals of the Variable Power Supply.

5.    Power on the 9030 PLC, DVM and the Variable Power Supply. No warm-up period is required for the IC693ALG221.

6.    Using the Variable Power Supply and verifying with the DVM, apply + 4.9990 VDC +/- 0.3 mV.

7.    Hook up the HHP or PC to the 9030 PLC. Go to the assigned reference address of the module in the Data Table.

8.    Verify that channel 1 reads 7D00H +/- 40H. If the reading is out of specifications then adjust P1 until channel 1 toggles between 7CF8H and 7D00H.


9.    Power off the Variable Power Supply and remove the power supply connection at pins 3 and 5. 10.  Connect the Variable Power Supply + and - leads to pins 4 and 6 of CH2 respectively. Power on the Variable Power Supply. Check the calibration of the channel as described in step 12.

11.    Repeat procedures 9-12 for channels 3 & 4 by substituting the correct terminal strip pins for each channel. ((CH3 [+,-] pins 13,15)(CH4 [+,-] pins 14,16))

12.    Verify the accuracy of each channel by testing for the following results: 

13.    Power off the 9030 PLC and the Variable Power Supply. Remove both range jumpers for channels 1-4. Remove the Variable Power Supply connection at channel 4 and re-connect the Variable Power Supply to channel 1.

14.    Power on the 9030 PLC and the Variable Power Supply.

15.    Using the Variable Power Supply and verifying with the DVM, apply + 4.9990 VDC +/- 0.3 mV.

16.    Verify that channel 1 reads 7D00H +/- 50H. If the reading is out of specifications then adjust P2 until channel 1 toggles between 7CF8H and 7D00H. This effectively calibrates to 1/2 bit (2 uA) resolution with a 4 mA offset.

17.    Repeat steps 9-11 and substitute the Calibration Verification chart in step 12 for the one in step 18.

18.    Verify the accuracy of each channel by testing for the following results: 

19.    Re-seal P1 and P2 with an anti-static potentiometer sealer.


Customer Questions and Answers

  • Question:  What is an IC693ALG221?  Answer:  The IC693ALG221 is a 4-Channel Analog Voltage Input module for the GE Fanuc 90-30 Series. This PLC is capable of converting an analog signal to a digital one.The module provides you 2 input ranges. Conversion speed for each of the 4 channels is one-half millisecond.
  • Question:  What is the main power supply for the IC693ALG221?  Answer:  The main power source for this Analog Input comes from the isolated +24 VDC power supplied by the PLC power supply. This particular voltage is then routed through an inverter/regulator to produce the operating voltages for the module.
  • Question:  How can I minimize capacitive loading and noise?  Answer:  The configuration of the field connections to the module should be with a good grade of twisted, shielded instrumentation cable.
  • Question:  Where should the shields be connected to?  Answer:  They should be connected to either COM or GND.
  • Question:  In what type of slot should the IC693ALG221 be installed?  Answer:  The IC693ALG221 Analog Input can be installed in any I/O slot of a 5 or 10-slot baseplate in a Series 90-30 PLC system.
  • Question:  Can I change the amount of channels or the voltage on this device?  Answer:  No, this is a fixed 4 channel device.
  • Question:  What is a good way to test this module?  Answer:  You can easily see if the unit is working by probing the channels of this Analog Input Module in the 90-30 Series with a voltage meter. You will be looking for a positive reading. You should probe the channels in the same way making sure your leads are correct. Your results should be consistent.
  • Question:  How to tell if your device is faulty (troubleshooting).  Answer:  If the OK light is not on, then your product may be in need of repair.

·         For more information on the IC693ALG221 Analog Input Module of the GE 90-30 Series, please see the Datasheet Manual.


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