EDM 01-17 DAG 7.1S Card User Guide
Connector
Pin-outs
Overview
DAG cards have an 8-pin RJ45 connector with two bi-directional RS422
differential circuits, A and B. The PPS signal is carried on circuit A, and the
serial packet is connected to the B circuit.
Pin Assignments
The 8-pin RJ45 connector pin assignments and plugs and sockets are shown
below:
1.
Out A+
2.
Out A-
3.
In A+
4.
In B+
5.
In B-
6.
In A-
8
1
8
1
Top
Front
8
1
RJ45 Socket
7.
Out B+
8.
Out B-
Normally you should connect the GPS input to the A channel input (pins 3
and 6).
The DAG card can also output a synchronization pulse for use when
synchronizing two DAG cards without a GPS input. The synchronization
pulse is output on the Out A channel (pins 1 and 2).
Ethernet Crossover Table
You can use a standard Ethernet crossover cable to connect the two cards as
shown below:
TX_A+ 1 3 RX_A+
TX_A- 2 6 RX-A-
RX_A+ 3 1 TX_A+
RX_B+ 4 7 TX_B+
RX_B- 5 8 TX_B-
RX_A- 6 2 TX_A-
TX_B+ 7 4 RX_B+
TX_B- 8 5 RX_B-
©2006
37
Version 2: May 2006
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