Allen-Bradley 1756-OF8I

Technical specifications

Manufacturer

Allen-Bradley

Manufacturer part no.

1756-OF8I

Type

Analog output module

Application

I/O module

Used with

ControlLogix 1756 chassis

Display

Module Health, In Calibration,Mode, Input, Fault and,Communication Status

Isolation

250V (continuous), reinforced,insulation type, outputs to,backplane. 250V (continuous),basic insulation type, output,to output

Special Features

Per Point Isolation

Analogue inputs configurable

Yes

Calibrated accuracy

0.05% @ 25°C (77 °F)

Conducted RF immunity

10V rms with 1 kHz sine-wave 80% AM from 150 kHz...80 MHz

Current draw

200mA @ 5.1V, Voltage or current mode with 250 Ω loads = 220mA @ 24V, Current mode with 500 Ω loads = 275mA @ 24V, Current mode with 750 Ω loads = 340mA @ 24V, Current mode with 1000 Ω loads = 385mA @ 24V

Data format

IEEE 32-bit floating point

Drive capability

Current output = 0...1000 Ω, Voltage output =>1000 Ω

EFT/B immunity

±4kV @ 5kHz on signal ports

Emissions

IEC 61000-6-4

Enclosure type rating

None (open-style)

ESD immunity

6 kV contact discharges, 8 kV air discharges

Input, current

Yes

Inputs

Eight isolated channels - any combination of voltage or current mode

Input signal, configurable

Yes

Input, voltage

Yes

Isolation voltage

250V (continuous), reinforced insulation type, outputs to backplane, 250V (continuous), basic insulation type, output to output

Module conversion method

R-Ladder DAC, monotonicity with no missing codes

Module error over full temperature range

0.1 %

Module keying

Electronic, software configurable

Module scan time

1 ms minimum

Open circuit detection

Current output = Yes

Operating temperature

0 to 60 °C

Output impedance

46 Ω (Current output)

Technical documents (1)

• Rockwell Automation technical data 1756-TD002

Key features

• Eight isolated output channels, each set to voltage or current
• Output ranges of -10 to 10V, 0 to 10V, 0 to 5V and 0 to 20 mA
• 16 bit resolution with IEEE 32-bit floating point data format
• Open circuit detection on current output, short circuit detection on voltage output
• Electronic keying set in software, with user-defined mechanical RTB keying

About the Allen-Bradley 1756-OF8I

The 1756-OF8I is a ControlLogix analog output module with 8 isolated points for current and voltage (36 pin). Calibrated accuracy is 0.05% at 25 °C, module scan time is 1 ms minimum, and settling time is under 2 ms to 95% of final value with resistive loads. Isolation is 250V continuous, reinforced insulation from outputs to backplane and basic insulation from output to output.

What is the 1756-OF8I used for?

It turns control data into analog signals for actuators, drives and other field devices, with each of the eight isolated channels set to voltage or current mode. Current outputs drive 0 to 1000 Ω and voltage outputs drive loads above 1000 Ω.

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-OF8I, 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.