AB 1746-OW16
AB 1746-OW16
AB 1746-OW16
AB 1746-OW16
AB 1746-OW16
AB 1746-OW16
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  • Lifecycle status

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

1746-OW16

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Allen-Bradley 1746-OW16 is an SLC 500 sixteen-point relay output module for switching 5–125 V DC or 5–265 V AC field loads.
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Technical specifications for 1746-OW16

  • Manufacturer:
    Allen-Bradley
  • Part Number:
    1746-OW16
  • Product Family:
    SLC 500
  • Product Type:
    16-Point Relay Output Module
  • Stock:
    1
  • Outputs:
    16 relay outputs
  • Points per common:
    8
  • Operating voltage:
    5–125 V DC; 5–265 V AC at 47–63 Hz
  • Backplane current at 5 V DC:
    0.170 A
  • Backplane current at 24 V DC:
    0.180 A
  • Maximum signal delay:
    10 ms, Off-to-On and On-to-Off
  • Minimum load:
    10 mA at 5 V DC
  • Maximum off-state leakage:
    0 mA
  • Continuous current:
    16 A per module; 8 A per common
  • Operating temperature:
    0–60 °C
  • Dimensions:
    3.46 × 14.45 × 13.02 cm
  • Weight:
    0.3 kg
  • Tariff Code:
    8538900000
  • 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 Load Compatibility Wiring Service Application
  • Provides sixteen relay outputs arranged as two groups of eight points per common
  • Switches documented field circuits from 5 to 125 volts DC or 5 to 265 volts AC
  • Uses a removable terminal block so field wiring can remain organized during module service

1746-OW16 is the sixteen-channel relay-output member of the Allen-Bradley SLC 500 discrete I/O family.

Its dry relay contacts accommodate AC or DC loads within the documented contact ratings, while two commons divide the sixteen outputs into two eight-point groups.

Selection must be based on the actual load category, steady-state current, inrush, switching frequency, suppression, common wiring, and the available SLC chassis power budget.

Availability, condition, price, and shipping time for 1746-OW16 are confirmed during quotation.

Allen-Bradley 1746-OW16 16-Point Relay Output 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.

  • Verify both steady-state current and inrush against the relay contact rating for the actual AC or DC load
  • Use suppression appropriate for inductive devices to reduce contact arcing and electrical noise
  • Do not assume that the module-wide current rating permits every point to carry its individual maximum simultaneously
  • The sixteen outputs are divided into two groups with eight points sharing each common
  • Record the original terminal assignments before moving the removable terminal block to a replacement module
  • Keep incompatible field potentials on separate common groups and follow the documented wiring method
  • Relay contacts are wear components, so intermittent or welded outputs require load and contact-condition checks
  • Confirm chassis power capacity before replacement because the module draws current from both backplane supplies
  • A replacement should be tested with the machine in a safe state before normal production is restored
  • Switching AC contactors, pilot devices, and interposing relays from an SLC 500 controller
  • Controlling DC solenoids and other discrete field loads within the documented relay ratings
  • Mixed-voltage machine control where the two isolated common groups are wired to suitable field supplies
Description
1746-OW16 is an Allen-Bradley SLC 500 sixteen-point relay output module for programmable-controller field-load switching.

The module provides two groups of eight relay outputs and supports 5–125 V DC or 5–265 V AC circuits, with a removable terminal block for field wiring.

Before installation or replacement, confirm the exact catalog number, load voltage and current, common grouping, contact duty, suppression, terminal map, chassis power budget, and saved SLC program.
Revisions

Revision Part #

Also known as

1746-OW16 Ser A
1746-OW16/A, Series A, Rev A
1746-OW16 Ser B
1746-OW16/B, Series B, Rev B
1746-OW16 Ser C
1746-OW16/C, Series C, Rev C
1746-OW16 Ser D
1746-OW16/D, Series D, Rev D
Alternative Names
1746-OW16 1746OW16 1746 OW16 Allen-Bradley 1746-OW16 Rockwell Automation 1746-OW16 AB 1746-OW16 SLC 500 1746-OW16
Technical notes
1746-OW16 uses mechanical relay contacts. Confirm the two eight-point common groups, load duty and inrush, suppression, terminal assignments, contact condition, and SLC chassis power 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 the Allen-Bradley 1746-OW16 removable terminal block normally stay with the wiring during replacement?
Yes. The official installation instruction identifies a removable terminal block, but label every conductor and confirm terminal condition before transferring it to another module.
Can Allen-Bradley 1746-OW16 switch AC and DC loads in the same installation?
It can switch documented AC or DC loads, but the two eight-point common groups must be wired so that field potentials, protection, and clearances remain suitable.
What should be checked when an Allen-Bradley 1746-OW16 output will not turn off?
Check the program command, common wiring, suppression device, terminal block, and whether the mechanical relay contact has welded because of excessive inrush or fault current.
How should inductive loads be protected on Allen-Bradley 1746-OW16?
Use a suppression device suitable for the load and supply type, installed according to the field-device and Rockwell wiring guidance, to reduce arcing and noise.
Can Allen-Bradley 1746-OW16 replace a transistor or TRIAC output module directly?
Not automatically. Relay, transistor, and TRIAC modules differ in leakage, switching speed, life, commons, and load compatibility; verify the full electrical design first.
What causes premature relay wear on Allen-Bradley 1746-OW16?
High inrush, frequent switching, insufficient suppression, overloads, and operation outside the specified contact duty can shorten mechanical and electrical life.
What information should be recorded before replacing Allen-Bradley 1746-OW16?
Record the complete catalog number, terminal map, common potentials, load type and current, suppression, chassis slot, fault symptoms, and the approved SLC program backup.

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