CROSS PERSONAL: Service & maintenance manual - rev. 1.1
Page 4.2
4.2. MONITOR PLUG FOR C-SAFE PORT
When the plug code 0WC00639AA is fitted into any one of the C-Safe ports on the machine, the
corresponding LED should illuminate to indicate the presence of the 5 Vdc supply on the port.
During the C-Safe port test function, the plug connects the transmit channel directly to the receive
channel, thereby producing a positive test outcome if the port is functioning correctly.