Chapter 2. Installation
2-4 Dual Nx56/64 Option Module User Manual 61200142L1-1
WiringThe 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
1Protective ground (PG)
4Request to send (RTS) from DTE
5Clear to send (CTS) to DTE
6Data set ready (DSR) to DTE
7Signal ground (SG)
8Received line signal detector (DCD) to DTE
9Transmitted 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