The 1746-OB16P is a single slot module that fits to any slot of an SLC500 chassis except the leftmost module which is reserved for the processor or communication module. The 1746-OB16P has a backplane current draw of 0.250 A at 5VDC and 0 A at 24VDC. It has an OFF state leakage current of 1 mA and load current of 1 mA. Eacu channel has a continuous Current of ) 1.5 A @ 30 °C (86 °F) 1.0 A @ 60 °C (140 °F) and continuous Current per module of 6.4 A @ 0...60 °C (32...140 °F).

The 1746-OB16P does not an output grouping or individual channel isolation. It comes with a single group, compsed of the entire Sixteen (16) channels. Each channel has an ON signal delay of 0.1 ms and OFF signal delay of 1.0 ms with ON-state voltage drop of 1.0V at 1.0 A with surge current per point of 4.0 A at 10 ms and surge current per module of 32.0 A at 10 ms.

The 1746-OB16P may be installed in the local chassis, along the processor or act to a distributed I/O station, along a communication adapter.

The 1746-OB16 SLC 500 Digital DC Output Module by Allen-Bradley is a DC module with sixteen 24V DC outputs and it is lodged in any free slot in the 1746 I/O Chassis. It has 16 output points and a backplane electrical rating of 0.280A at 5 Volts DC and one of 0A at 24V DC. The 1746-OB16 has a load-dependent maximum signal delay time of 1ms for OFF and 0.1ms for ON and a maximum current loss of 1mA in its OFF state. In its ON state, it has a voltage loss of 1.2 Volts at 0.50A and the minimum load each point can carry is 1mA.

The 1746-OB16 has a nominal input current of 0.5A at 30 degrees Celsius and 0.25 A at 60 degrees Celsius for each output point and it has a gross input current of 8A at 30 degrees Celsius and 4A at 60 degrees Celsius per module. It also has a current surge of 3A for 10ms recurring every 1s at 30 degrees Celsius and 2s at 60 degrees Celsius (140 degrees Fahrenheit). The 1746-OB16 provides voltage isolation between the backplane and the outputs tested at 1500 Volts AC and it has a total heat dissipation of 7.6 Watts. It has a UL-A196, CSA, and C-UL Class I, Division 2 Hazardous Environment ratings, and it is CSA and UL-certified. When operational, the 1746-OB16 has a working temperature range of 0 to 60 degrees Celsius (32 to 140 degrees Fahrenheit) at 5 to 95% non-condensing humidity surrounding and it is designed to withstand a 30G operational shock and a 2.5G operational vibration at 57 to 200 Hertz.