Printer
If the unit has been supplied with a serial printer, there should also be a 25 way to 9 way D-sub adaptor supplied. This is used to connect the 25 pin D-sub connection on the printer to the 9 pin D-sub connection on the main wiring loom labelled “Printer/PC”. Power to the printer is supplied through this connection, and hence no other power supply to the printer is required.