The catalog number 1738-232ASCM12 represents an Allen-Bradley/Rockwell Automation RS-232 ASCII module from the ArmorPoint I/O series of modules. The module comes with an IP 67-rated housing and so it does not have to be installed in an enclosure for additional protection. Additionally, the 1738-232ASCM12 module has a sealed M12 type of connector which is also a micro connector. The module is delivered with the appropriate mounting base for easy and secure mounting and it also includes several LED indicators for providing the users with quick status updates. The 1738-232ASCM12 module has one green/red module status indicator and one green/red network status indicator, along with 2 green TXD/RXD status indicators on the logic side. Additionally, the module has 2 special keyswitch positions.

The supported transmit end delimiter character set on the Allen-Bradley/Rockwell Automation 1738-232ASCM12 ArmorPoint module is the ASCII character set and the number of supported transmitted characters ranges from 1 to 128. The transmit serial data string and transmitted serial data length can be up to 128 bytes and the transmit transaction ID can be anywhere from 0 to 255. The 1738-232ASCM12 module supports 1 full duplex input and the supply voltage rating is 24 Volts DC (nominal). The maximum PointBus current rating of the module is 75 milliamps at 5 Volts DC and the maximum power dissipation rating is 0.75 Watts at 28.8 Volts DC. In addition to that, the maximum thermal dissipation rating of the module is 2.5 BTU per hour at 28.8 Volts DC. The 1738-232ASCM12 module has an isolation voltage rating of 50 Volts RMS for continuous voltage. The isolation voltage of the device is tested at 1250 Volts AC RMS for 60 seconds.