The Allen-Bradley/Rockwell Automation 1753-OB16 digital output module is designed for use with controllers from GuardPLC series. The 1753-OB16 module has 16 channels and it requires a 24 Volts DC of operating voltage. The module features an isolation voltage of 50 Volts continuous, a basic insulation type, and an I/O to Ethernet and Ethernet to DC power supply. The digital outputs of the module are not electrically isolated and they have an output voltage range of less or equal to L+ minus 2 Volts. The 1753-OB16 module should be placed in a location with good airflow and it should be positioned horizontally with at least a 100-millimeter (3.94-inch) gap above and below the module. For safety applications, the module can communicate with a GuardPLC controller through a GuardPLC Ethernet protocol. In order to achieve this kind of communication, the two 10/100 BaseT-RJ45 connectors located at the bottom of the unit are used. The Ethernet switch has an auto-detect feature and the connections from the GuardPLC module can be connected together in a linear manner to other distributed I/O modules. The 1753-OB16 module has many status indicators that are helpful.

The 1753-OB16 module has 2 RJ45, 10/100Base T Ethernet ports with integrated switches (with 100 Megabit per second). The module’s response time is less than 10 milliseconds with A current consumption around 0.2 Amps per group at 24 Volts. The module has an IP20 rated enclosure and approximate dimensions that include a width of 207 millimeters (8.16 inches), a height of 114 millimeters (4.49 inches), and a depth of 66 millimeters (2.60 inches). The weight of the 1753-OB16 module is approximately 0.85 Kilograms (1.87 pounds). The non-operating temperature range of the module is between -40 and 85 degrees Celsius (-40 and 185 degrees Fahrenheit) while the operating temperature ranges between 0 and 60 degrees Celsius (32 and 140 degrees Fahrenheit). The module is tested for vibrations according to the IEC 60068-2-6 standards and it is tested for shock resistance according to the IEC 60068-2-27 standards. The relative humidity that the module can tolerate is between 10 and 95%.