Elcon HiD 2000 Series, User Instruction Manual

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6-15
6.2.11 HiD 2871/2872
For these isolators, the Loop powered or Bus Powered function mode is configurable. Two distinct check
procedures are therefore presented. For simplicity, the "Loop power with control" mode is not covered by the
procedure.
Loop powered mode:
a)
for HiD 2871, set the configuration switches as:
S1=ON, S2=OFF, S3=OFF Ch.1
for HiD 2872, set the configuration switches as: S1=ON, S2=OFF, S3=OFF Ch.1, S1=ON, S2=OFF, S3=OFF Ch.2 ;
b)
connect the power supply, in series with the first multimeter A1 (current mode), to the unit “Loop power” input
terminals; connect the second multimeter A2 (current mode), in series with the resistor box Rc, at the "solenoid
valve" output terminals; set the supply at 24 V and switch it on;
c)
set the resistor box to 300
Ω
; the output current must be within 40 and 42 mA; both the green power and yellow
status LED must be on;
d)
disconnect the resistor box (output open-circuit); the input current must be < 30 mA; both the green power and
yellow status LED must be on;
e)
connect the multimeter A2 (current mode), in series with the resistor box Rc, at the "LED" output terminals;
f)
set the resistor box to 0
Ω
; the output current must be within 18 and 24 mA; both the green power and yellow
status LED must be on;