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IC660BBA021 Wiring

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  • IC660BBA021
  • IC660BBA021 Wiring

Product Description


General: The IC660BBA021 is a 24/48 volt DC RTD Input Block from the GE Fanuc Genius I/O Series. This block monitors temperature input from Resistive Temperature Detectors (RTDs). The IC660BBA021 block groups input circuits in three rows, each with two circuits.


Input Circuits: Each input circuit can be used with RTDs made from platinum, nickel, or copper. It has sensors in place to report input data to the CPU in engineering units of tenths of degrees Celsius, tenths of degrees Fahrenheit, tenths of Ohms, or counts, depending on how it is configured.


Calibration: The IC660BBA021 is factory-calibrated to detect temperature variations as low as one-tenth of one degree. Because it is factory-calibrated, it does not require subsequent recalibration.


Resistance: The IC660BBA021 measures resistance from 0 to 5,000 ohms. Values for parameters can be set such as input filter time, alpha type, alarm thresholds, linearization, and RTD resistance.


Measures: The IC660BBA021 is 8.83” (22.44cm) high, 3.5” (8.89 cm) wide, and 3.94” (10 cm) deep. Unit OK and I/O Enabled LEDs conveniently display block status.


Troubleshooting: Diagnostic software in the IC660BBA021 automatically captures the reasons for installation or run-time errors. These errors might be electrical shorts, wiring mistakes, range threshold violations, or alarm conditions. To facilitate troubleshooting, they trigger abbreviated but easily understandable messages such as “Overrange”, “Input Shorted”, “Internal Fault detection”, “Overrange and Underrange”, as well as High and Low input alarms on a handheld monitor. Fault reporting can be enabled or disabled circuit by circuit.


Note: Severe radio frequency interference in the environment (10 V/m or higher as described in IEC 801-3 of 1984) will degrade the accuracy of block measurements without generating error messages. It is important to note that the IC660BBA101 is identical to the IC660BBA021 block except it features a power supply capable of working with a higher voltage range (115 VAC/125 VDC).


Technical Specifications


Rated Voltage

24/48 VDC

# of Points





Platinum, Nickel or Copper RTDs

Operating Voltage

18 - 56 VDC

Points per Common

3 groups of 2


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GE Intelligent Platforms / GE Fanuc GE-IP Genius I/O

SKU 2174159  UPC 0799705802551

Part Number: IC660BBA021 / ic660bba021
Mfr/Brand Name: GE Automation
Mfr Number: IC660BBA021 / ic660bba021
Type: 24/48 volt DC RTD Input Block, 6 channels

Technical Specifications

  • Alarm thresholds
  • RTD resistance
  • Alpha type
  • Linearization
  • Input filter time
  • Input Short detection
Troubleshooting and Product Information for IC660BBA021

Download product information, troubleshooting guides and operation manuals to get your PLC operational.

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Other IC660BBA021

Available Revisions:

Confirm Your Revision Number

1C660BBA021 , GEFIC660BBA021 , CIMIC660BBA021


Block Type: CatalogNumbers:

115 VAC / 125VDCRTD Block

TerminalAssemblyOnly ElectronicsAssemblyOnly

24 / 48VDCRTD Block

TerminalAssemblyOnly ElectronicsAssemblyOnly

6 RTD–compatible inputs, 3 isolated groups of 2







LEDs (I/O Block):

UnitOK,I / OEnabled

Size (height x width x depth):

8.83” (22.44cm) x 3.50” (8.89cm) x 3.94” (10.00cm)


4 lbs. (1.8 kg)



Block to Block Isolation:

Group to GroupIsolation:

1500 V

300 V

115VAC/125 VDCblockpower:

115 VAC 125 VDC


93–132  VAC @ 7W 105–145 VDC  @ 7W

47–63 Hz 10% max. ripple

Power supply dropout time:

1 cycle 10mS

24/48 VDCblockpower:



18–56 VDC @ 7W, 10% max. ripple

Power supply dropout time:




Absolute accuracy (at 25C) Platinum or Nickel:

10 Copper:

Input update frequency Input filter ranges (per block) RTDlinearization

Resistancemeasurementrange Diagnostics


0.1  C

0.5 C typical, 1.0C   maximum

5C  typical,  ”10C maximum

Once every 400 ms, 800 ms, or 1600 ms

400 ms, 800 ms, 1600 ms

Platinum (DIN 43760), Nickel (DIN 43760), Copper, Linear

0 to 5000

Input shorted, Internal fault, Wiring error, Open wire, Overrange,

Underrange, High Alarm, Low Alarm




0C   to   +60C   (32F   to  +140F)


–40C   to   +100C   (–40F   to   212F)


5% to 95% (non–condensing)


5 – 10 Hz 0.2” (5.08mm) displacement, 10–200 Hz at 1G

Troubleshooting IC660BBA021

Troubleshooting information is available on IC660BBA021's website page; it also includes a datasheet, a user manual, and a wiring diagram.


Repair your IC660BBA021

PDF Supply can repair your IC660BBA021 in 3-5 business days. And PDF Supply stands by all of its repairs with a 1 year customer satisfaction warranty.


Configure CPU Redudancy
Description: When in redundancy mode configuration, you cannot select standby or none.
Resolution: This is a typo in the manual. "Hot Standby" only applies to output data so the block will know that it can receive outputs from two different bus controllers.

Customer Questions and Answers

  • Question:  What is an IC660BBA021?  Answer:  The IC660BBA021 is a 24/48 VDC RTD Input Block from the GE Fanuc Genius I/O Series. This block monitors temperature inputs from Resistive Temperature Detectors (RTDs).
  • Question:  What is the difference between IC660BBA021 and IC660BBA101?  Answer:  The only difference between these blocks is their power supply.
  • Question:  Can I use the IC660HHM501 Hand Held Monitor for the configuration of IC660BBA021?  Answer:  Yes, you can. 
  • Question:  What should the baud rate be set at when configuring this block?  Answer:  It should be set at 153.6K standard. 
  • Question:  When I press the leads against "in" and "return", what should be happening?  Answer:  You should be looking for a reading and if all the values of all your settings are the same then all your reading should be the same. (Tip: Make certain that all the screws are screwed down very tight to make sure the connections can happen accurately.)
  • Question:  When you have the CPU in run mode, what should happen?  Answer:  The Enabled LED should come on to let you know the block is enabled. This also means that the port is communicating. It lets you know the block is working properly and if you want to, you can force the inputs and outputs off or on using Proficy Machine Edition. 
  • Question:  What would indicate something is wrong with my IC660BBA021?  Answer:  If you power it up and it doesn't have any lights on at all, then your IC660BBA021 may need repair

For more information on the IC660BBA021 RTD Input Block of the GE Fanuc Genius I/O Series, please see the Datasheet User-Manual.

The final letter in the part number (ex. IC660BBA021K) indicates the revision. Revision K and later use the newer style electronic housing and therefore need the newer style plastic door and may indicate some compatibility issues with the terminal strip.

Need To Order A Specific Revision?

Give us a call at 1-800-360-6802 or 1-919-535-3180.

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These “New Surplus” units are a great cost saving alternative. This product is sealed in the original manufacturer’s packaging with all sub-assemblies and documentation. May indicate older date code. Comes with a PDF Supply 3-year warranty.

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Reconditioned products from PDF Supply are a cost-effective alternative to new and obsoleted PLC products. Every part is reconditioned down to the circuit board level and updated to the latest revision. All parts are thoroughly inspected and hand-cleaned before being functionally tested in a fully configured system.

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A verified substitute new product is a "drop in" replacement designed with identical specifications as the OEM product. It will meet all electrical and dimensional charactertics at a substanstially reduced price.

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