Serial Interface Board,
cont'd.
INTERFACES, cont'd.
"uart2:"
"uart3:"
P-3
P-6
The following straps and circuits are used to set up the desired type
of interface on the communication ports "uart2:" and "uart3:".
Communication Port "uart2:"
There are no straps for controlling the RS 232C interface on
"uart2:".
Communication Port "uart3:"
RS 232C:
Strap fitted on P-3 between pin 1 – 2 (left and middle pins) selects
RS 232C.
20 mA Current Loop:
Strap fitted on P-3 between pin 2 – 3 (middle and right pins) selects
20 mA current loop.
External +5V:
External +5V (max. 200 mA) can be made available on pin 16 by
fitting a strap on P-6.
Be careful not to enable this option unintentionally, which may
cause harm to the connected terminal, computer or other device.
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