Operating instructions

LOCAL OPERATION
3-102
Pin Connections
5
9
1
6
Fig. 3-32 Rear accessory port socket connections (as seen facing panel)
Table 3-2 Rear accessory port connections
Contact Function
1 +5 V
2 Logic line 3
or logic contact 3(a)
3 Logic line 2
or logic contact 2(a)
4 Logic line 1
or logic contact 1(a)
5 Logic line 0
or logic contact 0(a)
6 logic contact 3(b)
7 Logic contact 2(b)
8 Logic contact 1(b)
9 Logic contact 0(b)
Setting up
Logic line state
The state of the logic lines outputs can be set from the logic lines setup menu, accessible by the
key sequence, [HELP/SETUP], [Setup], [Setup Page 2], [Logic Lines].
The top four soft keys on the right of the display control the normal state of the logic lines.
Pressing these keys will set the options alternately.
If the appropriate section of S1 is closed, the output can be set to either logic high or logic low. If
the appropriate section of S1 is open, the contacts between pin pairs can be set to opened or
closed. Switch S1 is mounted within the option assembly, on the printed circuit board. The option
assembly must be removed from the service monitor to have access to S1. Remove the power
connection from the service monitor, and any connections from the option assembly before
removing it from the service monitor. After making changes to S1, refit the option assembly to the
service monitor before re-connecting the power lead. Each of the four lines can be set
individually.
When any section of S1 is closed, and the connector output of that line (pins 2,3,4 or 5) is at a
logic state high, the associated pin (6,7,8 or 9) will also be at logic state high.
When any section of S1 is open, and the connector output of that line (pins 2,3,4 or 5) is at a logic
state low, the associated pin (6,7,8 or 9) will be open circuit.