1771-OGD

The 1771-OGD PLC 5 Digital DC TTL Output Module by Allen-Bradley is an output module with 16 Transistor-Transistor Logic (TTL) outputs and is installed in a single slot of the 1771 I/O chassis series B and it also comes with a Logic Switch for selecting the Logic Operations between “High = True”, and “Low = True” Logic. The module’s output rating is 2-5.25V DC, and -0.2-0.8V DC (High = True) for both ON and OFF state and it has a maximum output sourcing current of 1mA, with 20mA (sinking). An additional customer supply power with a voltage rating of 5V DC (+0.25V) with less than 50mV peak-to-peak ripple is required for transmission of Transistor-Transistor Logic Signals and the module also requires 310mA (max) current from the output of the customer supplied power source. The 1771-OGD has a less-than-1mS output maximum signal delay time, and it dissipates 9.5 BTU/hr (max.) heat with 2.8 Watts (max.) power dissipation. It draws a backplane current of 230mA (max) and provides 1500V AC (RMS) voltage isolation. The module requires a Field Wiring Arm with a Wiring Screw Torque of 7-9 inch-pounds, and its outputs are fused with a 0.5A, 250V Normal Blow fuse. The 1771-OGD’s output circuitry uses a standard 14-gauge (2mm2) stranded Shielded (Belden 8761) wire size with a 3/64 inch (1.2mm) thick insulation, and keying of the module to the I/O backplane is achieved by connecting the connector band between pins 16 and 18, and between pins 26 and 28 of the I/O backplane top connector. The 1771-OGD has a working temperature range between 0 and 60 0C (32 and 140 0F) within 5-95% non-condensing humidity, and the module is CSA, CE, and UL-certified.