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1756-OA8D Allen-Bradley

Name: 1756-OA8D Allen-Bradley
Brand: Allen Bradley
SKU: 1756-OA8D
Price: 449.97 USD
Availability: InStock

$0.00 - $449.97

$449.97

$0.00 - $449.97

$449.97

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Product Details

Description · Specifications · Product Overview

Specifications provided for reference. Verify critical details against official manufacturer documentation before installation.

Product Overview

The 1756-OA8D is an Allen-Bradley ControlLogix 8-point diagnostic AC discrete output module designed for installation in a 1756 chassis. It provides electronically fused AC outputs (diagnostic per point), allowing point-level fault detection and controlled switching. Operating at 74-132 VAC, this module serves in applications such as motor control, valve actuation, and general AC load switching in automation systems where point-level protection and diagnostic information are required. 1756-OA8D integrates with ControlLogix I/O architecture for centralized control and monitoring.

Best Suited For

Motor starter control applications requiring diagnostics
Valve actuation with per-point electronic protection
AC load switching in ControlLogix systems
Industrial environments needing isolation and fault reporting

Channels

8 outputs (4-point groups)

Operating voltage

74…132 VAC

Electronic fusing

Per point

Backplane power

6.89 W total

Max current per point at 30 °C

1 A

Technical Specifications

I/O & Electrical

Outputs

8 diagnostic, electronically fused (groups of 4)

Operating voltage range

74…132 VAC, 47…63 Hz

Max current per point

1 A @ 30 °C; 0.5 A @ 60 °C (linear derating)

Max current per module

8 A @ 30 °C; 4 A @ 60 °C (linear derating)

Surge current per point

8 A for 43 ms @ 30 °C; 5 A for 43 ms @ 60 °C

Off-state leakage current

3 mA per point max

On-state voltage drop

2.5 V peak @ 0.5 A; 3 V peak @ 1 A

Inhibit voltage

25 V peak, zero-crossing

Communication & Power

Current draw @5.1 V

175 mA

Current draw @24 V

250 mA

Total backplane power

6.89 W

Power dissipation, max

5.3 W @ 60 °C

Thermal dissipation

18.0 BTU/hr

Physical & Environmental

Operating temperature

0…60 °C (32…140 °F)

Non-operating temperature

-40…85 °C (-40…185 °F)

Relative humidity

5…95 % noncondensing

Vibration (operating)

2 g @ 10…500 Hz

Shock (operating)

30 g

Shock (non-operating)

50 g

ESD immunity

6 kV contact; 8 kV air

Radiated RF immunity

10 V/m (80…2000 MHz), various modulations

EFT/B immunity

±4 kV at 5 kHz on signal ports

Surge immunity

±1 kV line-line; ±2 kV line-earth

Conducted RF immunity

10 V rms (150 kHz…80 MHz)

Certifications

cULusCERCMFMKCUKCAMorocco

Certified: cULus (Industrial Control Equipment; Class I Division 2 Groups A,B,C,D); CE (EMC and LVD per EN 61131-2, EN 61000-6-2/-6-4); RCM; FM (Class I Division 2); KC; UKCA; Morocco (per Moroccan EMC/Electrical regulations).

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Rockwell Automation documentation

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