The Allen-Bradley 1771-OW is a versatile selectable relay output module designed for industrial applications, featuring eight relay output channels organized into four groups. It allows for each channel to operate either as Normally Open or Normally Closed, with Normally Open as the default setting, making it suitable for managing different types of loads, particularly resistive loads. With a maximum continuous current capacity of 1.0 ampere per channel and operating voltage range of 24-138V AC or 24-125V DC, this module ensures reliable performance. Its robust design includes internal electrical isolation and compatibility with backplane power supply, necessitating only 700 mA of backplane current, and it maintains efficient energy use with thermal dissipation ranging from 11.3 to 12.6 BTU/hr.
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Technical specifications for 1771-OW
| Manufacturer | Rockwell Automation |
|---|---|
| Module Type | Selectable relay output module |
| Part Number/Catalog No. | 1771-OW |
| Brand | Allen-Bradley |
| Series | 1771 Product Bulletin |
| No. of Inputs | Eight (8) relay channels |
| No. of groups | Four (4) |
| Channels per group | Two (2) |
| Contact form | Normally Open (N.O.) / Normally Closed (N.C.) |
| Default configuration | Normally Open (N.O.) |
| Operating Voltage Range | 24 – 138VAC RMS; 24 – 125VDC |
| Output current rating per channel | 1.0 A |
| Minimum contact Load | AC: 10mA @ 24V DC: 10mA @ 24V |
| Power Dissipation | 3.3-3.7 Watts |
| Thermal Dissipation | 11.3-12.7 BTU/hr |
| Compatible chassis | 1771 I/O chassis |
| Keying | Between 6 and 8; Between 16 and 18 |
| Field Wiring Arm | Cat. No. 1771-WD |
| Wiring Arm Screw Torque | 7-9 inch-pounds |
| Number of Outputs | 8 (4 Sets of 2) Ouputs |
| Contact Output Type | 8 Selectable |
| AC Operating Voltage | 24-138 Volts |
| DC Operating Voltage | 24-235 Volts |
| Backplane Current | 700 Miliamperes |
| Max Continuous Current Per Module | N/A |
| Wiring Arm | 1771-WH |
| Coating | Conformal Coat |
| Typical AC Signal Delay (Off) | 45 (+/- 15) ms |
| Typical DC Signal Delay (Off) | 50 ms |
| Mounting | Rack Mountable |
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