Allen-Bradley 1746-IH16
Allen-Bradley 1746-IH16
Allen-Bradley 1746-IH16
Allen-Bradley 1746-IH16
Allen-Bradley 1746-IH16
Allen-Bradley 1746-IH16
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1746-IH16

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Allen-Bradley 1746-IH16 is a 16-point 125 V DC sinking input module for SLC 500 systems, with one common and removable terminal wiring.
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Technical specifications for 1746-IH16

  • Manufacturer:
    Allen-Bradley
  • Part Number:
    1746-IH16
  • Product Family:
    SLC 500
  • Product Type:
    16-Point 125 V DC Sinking Input Module
  • Stock:
    1
  • Module Type:
    Digital DC sinking input module
  • Inputs:
    16; 16 points per common
  • Input Voltage:
    125 V DC nominal; 90–146 V DC operating range
  • Input Current:
    2.15 mA at 125 V DC; 2.25 mA at 132 V DC nominal
  • Input Delay:
    9 ms maximum, on or off
  • Backplane Current Consumption:
    0.085 A at 5 V DC; 0 A at 24 V DC
  • Maximum Off-state Voltage:
    20 V DC
  • Maximum Off-state Current:
    0.8 mA
  • Power Dissipation per Point:
    0.320 W
  • Minimum Thermal Dissipation:
    0.675 W
  • Maximum Thermal Dissipation:
    3.08 W
  • Backplane-to-I/O Isolation:
    1500 V AC
  • Operating Temperature:
    0 to 60 °C
  • Non-operating Temperature:
    -40 to +85 °C
  • Relative Humidity:
    5–95%, noncondensing
  • 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 Input Design Installation Limits Compatibility Checks Application
  • Sixteen 125 V DC sinking inputs
  • One common for all sixteen input points
  • Removable terminal block with identification code 0507

1746-IH16 accepts sixteen 125 V DC field inputs in one SLC 500 chassis slot. Its sinking input architecture must be paired with correctly polarized sourcing field devices.

The module uses one common for all sixteen points and an identification-coded removable terminal block. Official installation data specifies a 90–146 V DC operating range and 9 ms maximum input delay.

Application design must observe the published simultaneous-point derating at elevated voltage and temperature. Surge suppression is also required when an input is wired in parallel with an inductive load.

Availability, condition, price, and shipping time for 1746-IH16 are confirmed during quotation.

Allen-Bradley 1746-IH16 16-Point 125 V DC Sinking 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.

  • Sixteen sinking input points share one common
  • Operating range is 90–146 V DC
  • Maximum on and off delay is 9 ms
  • Observe the published simultaneous-point derating curve
  • Match the removable terminal block identification code 0507
  • Apply surge suppression around parallel inductive loads
  • Confirm the field device provides the required sourcing signal
  • Verify chassis slot and backplane-current capacity
  • No direct Compact I/O replacement is identified in the official migration table
  • 125 V DC discrete status monitoring
  • Legacy SLC 500 control-panel maintenance
  • Replacement of a verified 1746-IH16 installation
Description
Allen-Bradley 1746-IH16 is a 16-point, 125 V DC sinking input module designed for SLC 500 control systems.

The module accepts 90–146 V DC input signals, uses one common for all sixteen points, and provides a maximum on or off signal delay of 9 ms.

Before installation or replacement, confirm sourcing field-device polarity, terminal-block identification code 0507, chassis backplane capacity, simultaneous-point derating, and required suppression for parallel inductive loads.
Revisions

Revision Part #

Also known as

1746-IH16 Ser A
1746-IH16/A, Series A, Rev A
1746-IH16 Ser B
1746-IH16/B, Series B, Rev B
1746-IH16 Ser C
1746-IH16/C, Series C, Rev C
Alternative Names
1746-IH16 1746IH16 1746 IH16 Allen-Bradley 1746-IH16 Allen Bradley 1746-IH16 Rockwell Automation 1746-IH16 SLC 500 1746-IH16
Technical notes
Allen-Bradley 1746-IH16 is a 125 V DC sinking input module. Confirm ID code 0507, terminal wiring, and inductive-load suppression 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.
Can a sourcing sensor be connected directly to Allen-Bradley 1746-IH16?
Only when the device sources current into the module’s sinking input and the field circuit matches the shared common. Verify polarity and wiring before energizing the circuit.
What field-device polarity is required by Allen-Bradley 1746-IH16?
It is a sinking input module, so the field device must source current into the input. Verify polarity and the shared common before energizing the circuit.
Why does Allen-Bradley 1746-IH16 limit the number of simultaneously energized points?
Input heating increases with field voltage and ambient temperature. Follow the official derating chart rather than assuming all sixteen points can remain on under every condition.
Why is surge suppression important with Allen-Bradley 1746-IH16?
Rockwell instructs users to apply suppression when an input is wired in parallel with an inductive load. The suppression limits transients that can produce false operation or damage.
How can the correct terminal block for Allen-Bradley 1746-IH16 be confirmed?
Check the removable terminal block and its identification code 0507, then compare every terminal label with the original wiring record before transferring conductors.
Is there a direct Compact I/O replacement for Allen-Bradley 1746-IH16?
The official SLC-to-Compact I/O migration table lists no recommended replacement. Any conversion therefore requires an engineered review of voltage, wiring, isolation, program mapping, and enclosure design.
What should be checked when one Allen-Bradley 1746-IH16 input does not turn on?
Measure the field voltage at the input and common, confirm sourcing polarity, inspect the terminal connection, and verify that the signal reaches the documented on-state range.

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