Specifications

Appendix E: Rear Transition module (RTM)

RS-232 (COM 2)

The RS-232 serial port is a male DB-9 DTE. The port is mounted on the RTM and

is accessible on the rear panel

USB

One externally accessible USB (Universal Serial Bus) connector, located on the

RTM’s rear panel, is a 4-pin single height connector defined as follows:

Table E-9. DB-9 pin-out

Pin Signal Pin Signal

1 Carrier detect 6 Data set ready

2 Receive data 7 Request to send

3 Transmit data 8 Clear to send

4 Data terminal ready 9 Ring indicator

5 Signal ground

Table E-10. USB connector pin-out

Pin Signal

Mechanical Solder Lug Shield Ground

1+5V

2DATA–

3DATA+

4 Ground

Mechanical Solder Lug Shield Ground