Product Description:

The 0GH-DO760 relay output module is produced by B&R Automation within the 0GH PLC Modules series. It equips a controller with eight form-C relay channels so solenoids, contactors, or indicator lamps can be driven directly from program logic. By placing electromechanical contacts between the low-voltage CPU bus and the field supply, the unit isolates control electronics while adapting to AC or DC loads in machinery and material-handling lines.

During normal service, the board distributes power to eight independent relays, and the output count of 8 indicates the number of separately switchable loads. Each contact tolerates 30 VDC / 240 VAC and carries a nominal current of 4.0 A per channel. For higher line levels, the contact gap interrupts circuits up to 125 VDC / 264 VAC, while the load must remain within 120 W at 30 VDC / 2000 VA. Contact resistance stays below 100 mΩ at 6 VDC and 100 mA, which helps limit I²R loss, and a minimum pickup of 5 VDC at 1 mA supports reliable recognition of low-energy logic. Aggregate consumption must remain under the 32 A bus limit so all channels can operate within the module's allowable current range.

Isolation and timing parameters protect both processor and field wiring. Channel-to-channel separation withstands 1 minute at 1000 VAC or a 1.4 kV surge, while 1 minute at 2800 VAC / 4 kV pulse isolation protects the PLC backplane. A make delay of 13 ms and a break time of 16 ms maximum provide predictable switching windows for interlocks and sequential control. The relays are rated for 5 × 10^6 cycles of mechanical life, supporting repeated operation over long service intervals. The housing has an IP20 rating, so the module is intended for installation inside closed cabinets with controlled airflow. Its four changeover contacts and four normally open contacts allow flexible field wiring, and the relay output stage maintains galvanic separation between logic and load circuits.