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ADCP-75-169 • Issue 1 • June 2004
Page 19
© 2004, ADC Telecommunications, Inc.
Figure 17. Configuring CAN Connections with Multiple Host Units
4.10 EMS Computer Connection
The service interface connection between the HU and the EMS computer is supported by a
single DB-9 female connector. The service connector provides an RS-232 DTE interface. A
three meter long straight-through RS-232 interface cable is available (accessory) for connecting
the EMS computer to the HU. Use the following procedure to install the service interface cable:
1. Connect one end of the service interface cable (accessory) to the SERVICE port as shown
in Figure 18.
2. Route the service interface cable to the EMS computer and connect the free end of the
cable to the computer’s RS-232 DCE port. Refer to the user manual provided with the
computer to locate and configure the specified port.
Figure 18. Service Interface Connection
HOST UNIT 1 HOST UNIT 2 HOST UNIT 3
NET IN NET OUT NET IN NET OUT NET IN NET OUT
16900-B
CONTROLLER AREA NETWORK
INTERFACE CABLES
TO NEXT HOST UNIT
(NOTE: LAST HOST HAS NO
CONNECTION AT NET OUT)
17870-A