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B-1
Appendix B:
Pin Assignments
The following table lists the pin assignments for each pair used
in the FlexBus 1500 cable.
FlexBus 1500 Pin Description
FlexBus 1500 4-pair Wiring Color Codes & Functions
Pair Pin Color Function
14
5
White/Blue
Blue/White
Segment 2
21
2
White/Orange
Orange/Blue
Segment 3
33
6
White/Green
Green/Blue
Segment 1
47
8
White/Brown
Brown/Blue
Management
The following tables describe the port pins for the EtherHub-16mi
+
(EH1502s). The EtherHub-16i
+
uses standard port pin assignments.
RS232 Port Pin Description
EIA
Circuit
CCITT
Signal
Description
EH1502s
DB9 DTE
Pin #
PC DB9
DTE
Pin #
Modem
DB25 DCE
Pin #
Signal
Direction
DTE -DCE
CF 109 DCD (Data Carrier Detected) 1 1 8 < --------
BB 104 RxD (Received Data) 2 2 3 < --------
BA 103 TxD (Transmitted Data) 3 3 2 -------- >
CD 108.2 DTR (Data Terminal Ready) 4 4 20 -------- >
AB 102 SG (Signal Ground) 5 5 7 ----------
CC 107 DSR (Data Set Ready) 6 6 6 < --------
CA 105 RTS (Request-to-Send) 7 7 4 -------- >
CB 106 CTS (Clear-to-Send) 8 8 5 < --------
CE 125 RI (Ring Indicator) 9 9 22 < --------