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EMS 7000 IRIS +
7940 ENGINEERS GUIDE v2.2 – 13/04/10
6
4. Programming Connection Details
4.1
The computer to transmitter physical connection details are as follows:-
COMPUTER
ISOLATED RS 232 PORT
PIN 2 ---------------------------------- TX OUT
PIN 3 ---------------------------------- RX IN
PIN 5 ---------------------------------- COMMON CONNECT
4.2
All Computer to HyperTerminal connections are shown below in Figure 3.
Figure 3
TAMPER
LOOP
0V 12V
DC
SUPPLY
COMMON
CONNECT
RX- RX+
RX TX COMMON
IN OUT
CONNECT
ISOLATED RS485
ISOLATED RS232
2
3
5
+
-
TO
POWER
SUPPLY
9 PIN
SERIAL
CONNECTOR