RS232 DB9 Connector

One DB9 RS232 connector, configured as COM1, is present on all current and legacy MICROS Workstations. For some, the port voltage is selected in the BIOS. In others, it is selected by the Diagnostics Utility.

Refer to the appropriate workstation setup guide for more details about powered DB9 COM ports.

The figure below shows the non-powered connector pin outs on the left and the powered connector pin outs on the right. The selected voltage, DSUB PWR, appears on Pin-9, the Ring Indicator. The selected voltage is applied to Pin 9, the Ring Indicator signal.

Figure 32-4 RS232 DB9 Connector