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Installation
14
515 HC04 - 8 June 2007
4-20mA Inputs
For an externally powered current loop, connect the transmitter to the input
terminals as shown in Figure 6. Refer to
for specific terminal numbers for this application.
Figure 6 Externally Powered Current Loop
The internal overload-protected power supply has sufficient power for three
current loops at 24V DC (more current loops can be supplied by using a
reduced voltage setting). Connect internally powered current loops as
shown in Figure 7.
Figure 7 Internally Powered Current Loops
RTD Input
The instrument uses 4-wire RTDs to provide optimum accuracy and
stability. It is not necessary to have equal cable lengths for the 4-wire RTDs,
but they should be no longer than 50 metres. It is also recommended to use
shielded twisted pairs.
+
-
Transmitter
Analog
Input
(AINPn)
+
-
15
+
+
-
Analog
Input
+
+
-
Analog
Input
Vo +8...24V DC
(AINPn)
(AINPn)
Transmitter
Transmitter
Содержание 515
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