Simex PUR-94D, User Manual

Page: 16 / 80

User manual - CONTROLLER PUR-94D
Figure 4.14. Connection of 3-wire current transducer
Figure 4.15. Connection of voltage transducer
Temperature sensor can be connected to the device in typical 4-wire circuit ( Figure 4.16a ) or
3-wire circuit ( Figure 4.16b ). Due to precision of measurement 4-wire circuit is recommended.
If 2 wire circuit is used, the resistance of wires should be as small as possible, to
avoid of measurement errors. Measured value can be corrected (constant
correction) using „
toFS ” parameter from menu „ inPt ”. Due to low precision 2-wire
connection is not recommended.
When 4-wires or 2-wires connection is used, the resistance of particular wires
(Ra ÷ Rd) CAN BE DIFFERENT . When 3-wires connection is used, the resistance of particular
wires (Ra ÷ Rd) MUST BE IDENTICAL to enable proper compensation of it's resistance. The
resistance of particular wire should not be greater than 20
W
.
16
+ -
5 6
24V DC
+ -
internally connected
-
+
+
-
31 32 33 34 35
31 32 33 34 35
+ -
5 6
24V DC
+ -
internally connected
-
+
+
+
-
+
31 32 33 34 35
31 32 33 34 35
i