Chapter 2. Installation
2-4 Dual Nx56/64 Option Module User Manual 61200142L1-1
Wiring
The Dual Nx56/64 option module has two 26-pin sub-
miniature D connectors. Each connector is pinned out as
shown in Table 2-1.
The connection of the header pins between the option module and the
plug-on board must be visually verified. An improper connection can
cause severe damage to the equipment.
Table 2-1. Subminiature D Connection
PIN DESCRIPTION
1
Protective ground (PG)
4
Request to send (RTS) from DTE
5
Clear to send (CTS) to DTE
6
Data set ready (DSR) to DTE
7
Signal ground (SG)
8
Received line signal detector (DCD) to DTE
9
Transmitted data (TD-A) to DTE
10
Transmitted data (TD-B) to DTE
11
Received data (RD-A) to DTE
12
Received data (RD-B) to DTE
13
External TX clock (ETC-A) from DTE
19
Test mode (TM) to DTE
22
TX clock (TC-A) to DTE
23
TX clock (TC-B) to DTE
24
RX clock (RC-A) to DTE
25
RX clock (RC-B) to DTE
26
External TX clock (ETC-B) from DTE
