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7000 Bus Converter User Manual (version 1.2,Feb/2003, 7PH-006-10) --------------- 22
2.7 Basic Wire Connection for I-7520:
RS 485 wire connection.
GND Ext. Power GND
+VS Ext. Power 10V-30V
Data- Data-
Data+ Data+
RS 232 wire connection
Host pin2 (RXD) 7520_Pin2
Host pin3 (TXD) 7520_Pin3
Host pin5 (GND) 7520_Pin5
6
7
8
9
1
2
3
4
5
7
6
5
4
3
8
2
1
9
10
6
7
8
9
1
2
3
4
5
Female 9-pin D-sub
Male 9-pin D-sub
Com 1/2/3/4 or
UART port
Host Computer
GND
+VS
Date+
Date
-
7
6
5
4
3
8
2
1
9
10
GND
+VS
Data-
Data+
Init*
14
15
16
17
18
13
19
20
12
11
7520
7000
24V
GND
RS-232C
Signal
RS-485
Signal
External power
7520R