AB 1746-ITB16
AB 1746-ITB16
AB 1746-ITB16
AB 1746-ITB16
AB 1746-ITB16
AB 1746-ITB16
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  • Lifecycle status

    Discontinued
    Discontinued date: 2024-09-30

1746-ITB16

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Allen-Bradley 1746-ITB16 is a 16-point fast-response 24 V DC sinking input module for SLC 500 applications requiring short input delays.
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Technical specifications for 1746-ITB16

  • Manufacturer:
    Allen-Bradley
  • Part Number:
    1746-ITB16
  • Product Family:
    SLC 500
  • Product Type:
    16-Point Fast DC Sinking Input Module
  • Stock:
    1
  • Module Type:
    Fast-response DC sinking input module
  • Inputs:
    16; 16 points per common
  • Input Voltage:
    24 V DC nominal; 10–30 V DC operating range
  • Input Current:
    8 mA nominal at 24 V DC
  • Input Delay:
    0.3 ms on; 0.5 ms off maximum
  • Number of Inputs:
    16
  • Input Points per Common:
    16
  • Input Type:
    Fast-response DC sinking input
  • Input Voltage Category:
    24 V DC
  • Input Operating Range:
    10–30 V DC
  • Nominal Input Current:
    8 mA at 24 V DC
  • Maximum Signal Delay:
    0.3 ms on; 0.5 ms off
  • Typical Signal Delay:
    0.1 ms on; 0.25 ms off at 24 V DC
  • Maximum Off-state Voltage:
    5.0 V DC
  • Maximum Off-state Current:
    1.5 mA
  • Backplane Current at 5 V DC:
    0.050 A
  • Backplane Current at 24 V DC:
    0 A
  • Operating Temperature:
    0–60 °C
  • Nonoperating Temperature:
    −40–85 °C
  • Relative Humidity:
    5–95%, noncondensing
  • Dimensions:
    12.7 cm x 5.1 cm x 15.2 cm
  • Weight:
    0.3 kg
  • 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 Sinking Interface Pulse Capture Replacement Verification Application
  • Sixteen fast-response 24 V DC sinking inputs
  • 0.3 ms maximum on delay and 0.5 ms maximum off delay
  • Removable terminal block with identification code 0509

1746-ITB16 provides sixteen fast-response 24 V DC sinking inputs in one SLC 500 slot. It is intended for applications where standard filtered input response is too slow.

The documented 10–30 V DC operating range and sourcing field-device requirement must be respected. Maximum input delays are 0.3 ms on and 0.5 ms off.

Fast response also makes wiring quality and electrical noise important. Verify polarity, common wiring, terminal-block code 0509, shielding practices, and program filtering before replacement or commissioning.

Availability, condition, price, and shipping time for 1746-ITB16 are confirmed during quotation.

Allen-Bradley 1746-ITB16 Fast-Response 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.

  • Use sourcing field devices with the sinking input architecture
  • Verify the shared common and terminal-block identification code 0509
  • Check polarity before applying 24 V DC field power
  • Fast response can capture contact bounce or short noise pulses
  • Use suitable sensor wiring and program filtering where permitted
  • Compare the actual pulse width with the SLC 500 scan behavior
  • Record the installed terminal block and field-device polarity
  • Remove power before transferring the removable terminal block
  • Do not substitute a sourcing-input module without rewiring review
  • Fast discrete sensor detection
  • SLC 500 sequence and position monitoring
  • Replacement of a verified 1746-ITB16 installation
Description
Allen-Bradley 1746-ITB16 is a fast-response, 24 V DC sinking input module for SLC 500 control systems.

The module provides sixteen input points sharing one common, accepts 10–30 V DC field signals, and offers maximum input delays of 0.3 ms on and 0.5 ms off.

Before installation or replacement, confirm sourcing-device polarity, the removable terminal block identification code 0509, backplane loading, input suppression requirements, and enclosure heat dissipation.
Revisions

Revision Part #

Also known as

1746-ITB16 Ser A
1746-ITB16/A, Series A, Rev A
1746-ITB16 Ser B
1746-ITB16/B, Series B, Rev B
1746-ITB16 Ser C
1746-ITB16/C, Series C, Rev C
Alternative Names
1746-ITB16 1746ITB16 1746 ITB16 Allen-Bradley 1746-ITB16 Allen Bradley 1746-ITB16 Rockwell Automation 1746-ITB16 SLC 500 1746-ITB16
Technical notes
Allen-Bradley 1746-ITB16 is a fast sinking input module. Confirm ID code 0509, field-device polarity, and input timing 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 Allen-Bradley 1746-ITB16 capture a short sensor pulse reliably in an SLC 500 program?
Confirm the sensor pulse width, field wiring, and SLC scan behavior together. Fast hardware response does not by itself guarantee that the controller program will capture every pulse.
Will a 3-wire sourcing sensor work with Allen-Bradley 1746-ITB16?
It can work when the sensor switches positive DC voltage into the input and shares the correct 0 V common. Verify sensor leakage, wiring polarity, and the required input threshold before commissioning.
Why can mechanical contact bounce affect Allen-Bradley 1746-ITB16?
The short response time can detect transitions that a slower filtered input may ignore. Use suitable sensors, clean wiring, or program filtering where the process allows.
How is the correct terminal block identified for Allen-Bradley 1746-ITB16?
The official installation data gives identification code 0509. Verify the code, keying, conductor labels, and terminal drawing before transferring the block.
Can Allen-Bradley 1746-ITB16 be used for slow limit switches?
It can read a valid 24 V DC signal, but its fast response may expose bounce or noise. Confirm that program filtering and machine safety behavior remain suitable.
Is a Compact I/O migration for Allen-Bradley 1746-ITB16 a direct wire-for-wire swap?
No. Even where a migration candidate exists, connector style, addressing, electrical characteristics, program timing, enclosure layout, and commissioning tests require engineering review.
What should be checked when Allen-Bradley 1746-ITB16 records unexpected pulses?
Inspect sensor output, grounding, cable routing, DC supply stability, common wiring, contact bounce, and program filtering, then compare pulse width with the module’s fast response.