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8
B) AUXILIARY INPUT
Fig. 8 AUXILIARY INPUT WIRING
NOTES :
1) This input is not isolated from measuring input. A double or
reinforced insulation between instrument output and power
supply must be assured by the external instrument.
2) Don’t run input wires together with power cables.
3) Pay attention to the line resistance; a high line resistance may
cause measurement errors.
Shield
_
+
mA
or
V
6
5
+
_
G
mA
or
V
5
6
Fig. 7.C INPUTS WIRING FOR 4-WIRE TRANSMITTER
NOTES :
1) Don’t run input wires together with power cables.
2) Pay attention to the line resistance; a high line resistance may
cause measurement errors.
3) When shielded cable is used, it should be grounded at one
side only to avoid ground loop currents.
4) The input impedance is lower than 5
W
(20 mA input)
Shield
3
1
11
7
PWR
+
Out
+
TX
PWR
_
Out
_
Xkc-1-C0.P65 5/29/02, 11:59 AM 8