Allen-Bradley 1756-OB16E

Technical specifications

Manufacturer

Allen-Bradley

Manufacturer part no.

1756-OB16E

Type

Digital output module

Application

I/O module

Used with

ControlLogix 1756 chassis

Outputs

16 electronically fused (8 points/group)

Voltage category

12/24V DC source

Operating voltage range

10…31.2V DC

Output delay time

70 µs nom/1 ms max 360 µs nom/1 ms max

Current draw @ 5.1V

250 mA

Current draw @ 24V

2 mA

Total backplane power

1.32 W

Power dissipation, max

4.1 W @ 60 °C (140 °F)

Thermal dissipation

13.98 BTU/hr

Off-state leakage current per point, max

1 mA per point

On-state voltage drop, max

400 mV DC @ 1 A

Current per point, max

1 A @ 60 °C (140 °F)

Current per module, max

8 A @ 60 °C (140 °F)

Surge current per point, typical

2 A for 10 ms per point, repeatable every 2 s @ 0 °C (32 °F) @ 24V DC

Load current, min

3 mA per point

Scheduled outputs

Synchronization within 16.7 s max, reference to the Coordinated System Time

States in Fault mode per point

Hold last state, On or Off (Off is default)

Isolation voltage

250V (continuous), basic insulation type, outputs-to-backplane, and output group-to-group, No isolation between individual group outputs

Module keying

Electronic, software configurable

Fusing

Electronically fused per group

RTB keying

User-defined mechanical

Slot width

1

Enclosure type

None (open-style)

Temperature code

T4

Technical documents (1)

• Rockwell Automation technical data 1756-TD002

Key features

• 16 electronically fused outputs, 8 points per group
• Fault mode holds last state or Off, Off by default
• Electronic keying, software configurable
• 250V continuous isolation, outputs to backplane and group to group
• Single slot width with user-defined mechanical RTB keying

About the Allen-Bradley 1756-OB16E

The 1756-OB16E is a ControlLogix 10-31 VDC electronically fused output module, 16 points with a 20 pin connector. It is a 12/24V DC source module with an operating range of 10 to 31.2V DC, rated 1 A per point and 8 A per module at 60 °C (140 °F).

What is the 1756-OB16E used for?

It switches DC loads from a ControlLogix controller on 16 electronically fused outputs, 8 points per group. Scheduled outputs synchronise within 16.7 s max, referenced to the Coordinated System Time. In fault mode each point can hold its last state or go On or Off, with Off as the default.

Lifecycle and successor

Active (Rockwell Automation lifecycle status, checked 24 October 2026).

Before you order

What to photograph or confirm so the right unit is quoted.

Read the catalog number 1756-OB16E, the series letter and the firmware revision from the label. Send us a photo of the label and we confirm the match before we quote.