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1756-OB16IS

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Allen-Bradley 1756-OB16IS is a sixteen-point isolated ControlLogix DC output module for compatible 10–30 V DC field-load circuits.
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Technical specifications for 1756-OB16IS

  • Manufacturer:
    Allen-Bradley
  • Part Number:
    1756-OB16IS
  • Product Family:
    ControlLogix
  • Product Type:
    ControlLogix 16-Point Isolated DC Digital Output Module
  • Stock:
    1
  • Output type:
    isolated DC digital output
  • Output points:
    16
  • Operating voltage:
    10–30 V DC
  • Output current:
    2 A per point at 30 °C, linearly derated to 1 A at 60 °C
  • Output isolation:
    250 V continuous between outputs
  • Connector:
    36 pin
  • Module output current:
    8 A at 30 °C, linearly derated to 4 A at 60 °C
  • Scheduled outputs:
    8, outputs 0–7
  • Schedule interval:
    100 µs
  • Schedules per output:
    up to 16
  • Scheduling timebase:
    Coordinated System Time (CST)
  • Removable terminal blocks:
    1756-TBCH or 1756-TBS6H
  • Weight:
    0.2 kg
  • Tariff Code:
    8473309000
  • 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 Scheduled Points Temperature Derating CST Commissioning Application
  • Provides sixteen individually isolated 10–30 V DC sink/source outputs
  • Outputs 0–7 support as many as sixteen scheduled transitions in 100 µs increments
  • Requires CST synchronization, temperature derating, and a 1756-TBCH or 1756-TBS6H terminal block

1756-OB16IS combines standard isolated DC output operation with scheduled switching on its first eight points.

Scheduled commands use the Logix Scheduled Output Data Per Point format and Coordinated System Time; they must not be confused with confirmation from the external load.

Confirm output polarity, load current, ambient-temperature derating, RTB wiring, controller ownership, CST master, task timing, and MAOC configuration before operation.

Availability, condition, price, and shipping time for 1756-OB16IS are confirmed during quotation.

Allen-Bradley 1756-OB16IS ControlLogix Scheduled Isolated DC 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.

  • Use outputs 0–7 when the application requires 1756-OB16IS scheduled operation
  • Enter scheduled transitions in documented 100 µs increments referenced to CST
  • Do not exceed sixteen scheduled transitions for an individual scheduled output
  • Derate each output from 2 A at 30 °C to 1 A at 60 °C
  • Derate total module output from 8 A at 30 °C to 4 A at 60 °C
  • Include load inrush, external protection, enclosure temperature, and conductor heating in the review
  • Select Scheduled Output Data Per Point when the Logix project uses scheduled 1756-OB16IS commands
  • Verify the CST master, controller time synchronization, task timing, and MAOC ownership
  • Prove standard and scheduled outputs separately before enabling the machine sequence
  • Individually isolated 12 V or 24 V DC sink/source field circuits
  • Position-based machine-output control using scheduled outputs 0–7
  • Mixed installations using scheduled points 0–7 and standard operation on points 8–15
Description
1756-OB16IS is an Allen-Bradley ControlLogix 16-point individually isolated scheduled DC output module for 10–30 V DC sink/source circuits.

Outputs 0–7 support scheduled switching in 100 µs increments using Coordinated System Time, while all sixteen outputs are isolated from one another and from the backplane.

Before installation or replacement, confirm Series A identity, the 1756-TBCH or 1756-TBS6H terminal block, field-device polarity, load current and temperature derating, external protection, scheduling format, CST master, and the accepted Logix project.
Revisions

Revision Part #

Also known as

1756-OB16IS Ser A
1756-OB16IS/A, Series A, Rev A
Alternative Names
1756-OB16IS 1756 OB16IS 1756OB16IS Allen-Bradley 1756-OB16IS Rockwell Automation 1756-OB16IS ControlLogix 1756-OB16IS
Technical notes
1756-OB16IS Series A is an isolated 10–30 V DC output module; confirm sourcing field devices, individual output wiring, terminal hardware, and the approved ControlLogix map.
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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 1756-OB16IS switch AC field devices?
No. 1756-OB16IS is a DC output module. Match the module to the actual field-device supply and switching type.
Which Allen-Bradley 1756-OB16IS outputs support scheduled operation, and what timing must the project use?
Outputs 0–7 are scheduled points. Rockwell Automation documents 100 µs scheduling increments and up to sixteen schedules per point referenced to CST; verify the Scheduled Output Data Per Point format, CST master, controller task, and MAOC configuration before commissioning.
Why can one 1756-OB16IS point remain off while the controller command is on?
Check the individual load, field supply, wiring, terminal connection, protection, and controller output mapping before replacing the module.
Does 1756-OB16IS include field terminal hardware?
Treat the required terminal block and field-wiring components as separate unless the supplied stock description specifically includes them.
What must be checked before replacing 1756-OB16IS in a running panel?
Confirm the output map, field-device polarity, supply source, protective devices, slot keying, and the safe state of each controlled circuit.
Can 1756-OB16IS replace another sixteen-point DC output module solely by point count?
No. Isolation, output architecture, wiring, load requirements, Series, and the application configuration must all match.
Why is individual circuit isolation important when applying 1756-OB16IS?
The isolation arrangement is part of the module's documented design and must be preserved in the panel wiring and fault-analysis approach.