Allen-Bradley 1746-IB32
Allen-Bradley 1746-IB32
Allen-Bradley 1746-IB32
Allen-Bradley 1746-IB32
Allen-Bradley 1746-IB32
Allen-Bradley 1746-IB32
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  • Lifecycle Status

    Discontinued
    Discontinued date: 2022-11-24
    Replacement category: Engineering Replacement

1746-IB32

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Allen-Bradley 1746-IB32 is a 32-channel, 24V DC current-sinking digital input module for collecting discrete field signals in an SLC 500 chassis.
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Technical specifications for 1746-IB32

  • Manufacturer:
    Allen-Bradley
  • Part Number:
    1746-IB32
  • Product Family:
    SLC 500
  • Product Type:
    32-Channel 24V DC Current-Sinking Digital Input Module
  • Stock:
    1
  • Number of Inputs:
    32
  • Input Type:
    Current-sinking DC
  • Input Groups:
    4 isolated groups of 8 inputs
  • Points per Common:
    8
  • Voltage Category:
    24V DC
  • Operating Voltage:
    15–30V DC at 50°C; 15–26.4V DC at 60°C
  • Minimum On-State Voltage:
    15.0V DC
  • Maximum Off-State Voltage:
    5.0V DC
  • Maximum Off-State Current:
    1.5 mA
  • Nominal Input Current:
    5.1 mA at 24V DC
  • Maximum Signal Delay:
    3 ms ON; 3 ms OFF
  • Backplane Isolation:
    1500V AC for 1 minute
  • Backplane Current — Series A–C:
    50 mA at 5V DC; 0 mA at 24V DC
  • Backplane Current — Series D and later:
    106 mA at 5V DC; 0 mA at 24V DC
  • Thermal Dissipation — Series A–C:
    0.20 W per point; 0.25 W minimum; 6.65 W total
  • Thermal Dissipation — Series D and later:
    0.20 W per point; 0.530 W minimum; 6.90 W maximum
  • Field Connector:
    Keyed 40-pin female connector with crimp contacts
  • Conductor Size:
    22–26 AWG for supplied crimp contacts
  • Tariff Code:
    8537101190
  • Country of origin:
    USA
  • Place of shipment:
    Xiamen,Fujian,China
By purchasing this item, you agree to the Terms & Conditions, ApterPower is not an authorized distributor for listed manufacturers or tradenames and therefore the manufacturer's warranty does not apply. All our products come with ApterPower's 1-year warranty.

More Information

Overview Manuals Series Wiring Installation Application
  • Provides 32 current-sinking inputs for 24V DC discrete field signals.
  • Separates the inputs into four isolated eight-point groups with one common per group.
  • Uses a keyed 40-pin field connector instead of a conventional SLC removable terminal block.

Allen-Bradley 1746-IB32 is a high-density digital input module designed for the SLC 500 chassis-based control platform.

It receives sourcing-device signals through four separately commoned input groups and transfers their discrete states to the installed SLC processor through the chassis backplane.

Before installation or replacement, verify the hardware Series, compatible chassis and processor, backplane loading, field-supply polarity, connector pinout, common-group isolation, and existing input-address assignment.

Availability, condition, price, and shipping time for Allen-Bradley 1746-IB32 are confirmed during quotation.

Allen-Bradley 1746-IB32 Digital Input Module Manuals, Datasheets, Links

Important Notice: Other accessories, manuals, cables, calibration data, software, etc. are not included with this equipment unless listed in the above stock item description. All prices are shown in USD.

  • Series A, B, and C modules contain one nonreplaceable 2.5 A fuse for each common group.
  • Series D modules are unfused, so external circuit protection must match the installed system design.
  • Series D and later use documented backplane-current and thermal-dissipation values that differ from Series A–C.
  • The keyed 1746-N3 female connector accepts the supplied crimp contacts for 22–26 AWG conductors.
  • The two common pins within each eight-point group are internally connected, while the four groups remain isolated.
  • Allen-Bradley 1492 prewired cables and interface modules can replace individually crimped field wiring when group isolation is preserved.
  • Disconnect chassis power before installing, removing, or wiring the module.
  • Install the module in an I/O slot; the first chassis slot is reserved for the processor or a 1747-ASB remote-I/O adapter.
  • Route field wiring away from the module and cover unused chassis slots with a 1746-N2 slot filler.
  • Interfacing PNP photoelectric sensors with SLC 500 discrete-input logic.
  • Receiving switching states from compatible PNP inductive proximity sensors.
  • Receiving discrete outputs from compatible PNP ultrasonic and capacitive sensors.
Description
Allen-Bradley 1746-IB32 is a 32-channel, 24V DC current-sinking digital input module for the SLC 500 control platform.

The module divides its inputs into four isolated groups of eight points and transfers compatible discrete field-device states to the controller through the SLC 500 chassis backplane.

Before installation or replacement, confirm the complete catalog number and hardware Series, compatible chassis and processor, backplane capacity, 40-pin connector or 1492 wiring system, group-common arrangement, field-supply polarity, and existing address mapping.
Revisions

Revision Part #

Also known as

1746-IB32 Ser A
1746-IB32/A, Series A, Rev A
1746-IB32 Ser B
1746-IB32/B, Series B, Rev B
1746-IB32 Ser C
1746-IB32/C, Series C, Rev C
1746-IB32 Ser D
1746-IB32/D, Series D, Rev D
Alternative Names
1746-IB32 1746 IB32 1746IB32 Allen-Bradley 1746-IB32 Allen Bradley 1746-IB32 SLC 500 1746-IB32 Allen-Bradley SLC 500 1746-IB32
Technical notes
Allen-Bradley 1746-IB32 Series A–C use nonreplaceable group fuses; Series D is unfused. Verify Series, 40-pin wiring, and chassis capacity before replacement.
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FAQS

The following is a list of questions commonly asked by our customers. Please contact us if you have a question about our process that is not answered below.
Does Allen-Bradley 1746-IB32 use a removable terminal block?
It uses a keyed 40-pin connector rather than the conventional SLC removable terminal block. New modules were supplied with a female connector and crimp contacts, but included parts must be confirmed when buying surplus or refurbished stock.
Why must the hardware Series be checked before replacing Allen-Bradley 1746-IB32?
Series A–C modules have one nonreplaceable 2.5 A fuse per common, while Series D is unfused. Series D and later also use different documented backplane-current and thermal-dissipation values, so chassis loading must be recalculated.
Can one 5069-IB16 directly replace Allen-Bradley 1746-IB32?
No. Rockwell's migration guide maps one 1746-IB32 to two 5069-IB16 modules. The change also involves a different I/O platform, wiring arrangement, chassis architecture, addressing, and project configuration.
How is group isolation preserved when wiring Allen-Bradley 1746-IB32 through a 1492 interface module?
The four DC common groups are isolated inside the module. Use a 1492 terminal block that preserves group isolation; an interface arrangement that ties the commons together defeats that separation.
Which terminal numbering should be followed when wiring Allen-Bradley 1746-IB32?
Use the decimal input numbers when the module is installed in an SLC system. The official diagram also shows octal numbers for PLC systems, so the selected door and terminal labels must match the controller addressing convention.
What must be checked when connecting PNP sensors to Allen-Bradley 1746-IB32?
Confirm that the sensor is a sourcing PNP device, its supply and output meet the module's input limits, and its off-state leakage will not hold the input on. Rockwell sensor-interface guidance provides bleeder-resistor values when leakage requires correction.
Why might an Allen-Bradley 1746-IB32 input remain on after the field device turns off?
Check sensor leakage current, shared-common wiring, PNP/NPN polarity, connector pin placement, damaged Series A–C group fuses, and the decimal-versus-octal label selection before replacing the module.