The 1756-OA8 is a high-reliability AC output module from the Allen-Bradley ControlLogix family, designed for demanding industrial automation environments where precise switching of 120/240VAC loads is required. Each of the eight output channels is individually fused and optically isolated, ensuring robust protection against electrical noise and transient surges. The module supports a wide operating voltage range (85-264VAC) and can handle inrush currents up to 10A per point for 10ms, making it ideal for controlling contactors, solenoids, motor starters, and other inductive loads. With a typical OFF-state leakage current of less than 2mA, the 1756-OA8 ensures reliable de-energization of connected devices. Its compact form factor fits seamlessly into any 1756 I/O chassis, and the module is fully compatible with ControlLogix controllers (e.g., 1756-L7x, 1756-L8x) for seamless integration into existing control systems. The module’s isolation rating of 2500VAC between field wiring and backplane provides superior immunity to ground loops and fault propagation.
| Parameter |
Specification |
| Product Type |
AC Output Module |
| Series |
ControlLogix |
| Number of Outputs |
8 (isolated per point) |
| Voltage Range (Operating) |
85-264VAC (47-63 Hz) |
| Rated Output Voltage |
120/240VAC |
| Output Current per Point (Continuous) |
2A |
| Output Current per Module (Continuous) |
8A |
| Inrush Current Capability |
10A per point for 10ms |
| OFF-State Leakage Current |
< 2mA |
| Isolation Voltage (Field to Backplane) |
2500VAC for 1 minute |
| Isolation Voltage (Channel to Channel) |
2500VAC for 1 minute |
| Output Type |
Triac (AC switching) |
| Load Type |
Resistive, inductive, lamp, motor |
| Minimum Load Current |
50mA |
| Response Time (ON to OFF) |
0.5 ms typical |
| Response Time (OFF to ON) |
0.5 ms typical |
| Power Dissipation |
5.5W (max) |
| Backplane Current Consumption (5V) |
100mA |
| Backplane Current Consumption (24V) |
200mA |
| Operating Temperature |
0°C to 60°C (32°F to 140°F) |
| Storage Temperature |
-40°C to 85°C (-40°F to 185°F) |
| Relative Humidity |
5% to 95% non-condensing |
| Shock Rating |
30g (operational) |
| Vibration Rating |
5g (10-500 Hz) |
| Enclosure Type |
Open-style (IP20 rating for terminals) |
| Weight |
0.36 kg (0.79 lb) |
| Dimensions (H x W x D) |
144 mm x 35 mm x 105 mm (5.67 in x 1.38 in x 4.13 in) |
| Field Wiring |
Removable terminal block (screw type, 12-22 AWG) |
| Indicators |
Green LED per output (ON), Red LED per output (fault), Module status LED |
| Module Status |
OK, Fault, No Power |
| Compatible Chassis |
1756-A4, 1756-A7, 1756-A10, 1756-A13, 1756-A17 (all ControlLogix sizes) |
| Certifications |
UL 508, CSA C22.2 No. 142, CE, ATEX (Zone 2), IECEx |
| Warranty |
Standard 2-year manufacturer warranty (extended available) |
What Does Our Clients Say
Mitsubishi MR-J4
Laura Navas
Great product!
2019/12/01
Keyence sensor
EQDR SALES
Original and fast!
2020/02/22