UBI EasyCoder 501 – Service Manual
164
23. INDUSTRIAL INTERFACE BOARD, cont'd.
23.2
Straps
Communication Port "uart3:"'
RS 232C:
There are no straps for the RS 232C interface on "uart3:".
Ex5V:
Ex5V ( max. 200 mA) can be made available on pin 16 by
fitting a strap on P-1
1
.
IN/OUT connector
In/Out port 201-204:
One relay for each port switches the
OUT
signal to high or low as
PORTOUT ON/OFF
statements are executed in the program.
Four straps, P-2, P-6, P-7 and P-8, control the relation between
relay and output signal on output ports 201–204 respectively:
PORTOUT stmt
Strap between pins
OUT signal
PORTOUT (<nexp>) ON
1–2 (lower position)
Open
PORTOUT (<nexp>) ON
2–3 (upper position)
Closed
PORTOUT (<nexp>) OFF
1–2 (lower position)
Closed
PORTOUT (<nexp>) OFF
2–3 (upper position)
Open
1
/. Be careful not to enable the external
+5V unintentionally, since it may cause
harm to the connected terminal, com-
puter or other device.
P4
P2
P3
P5
P6
P7
P8
1
2
31
2
31
2
31
2
3
P1
P-7
P-8
I/O connector
"uart3:"
P-1
P-2
P-6
Содержание EasyCoder 501 SA
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