Connection of sensors
Max. permissible values of the control circuits
for SN2301 ... SN2304:
Max. permissible values of the control circuits
for SR2301:
To prevent negative effects on the functions caused by noise voltages, sensor cables
and load cables should be laid separately. Maximum length of the sensor cable:
100m. Adhere to the maximum permissible values for the external inductance and
capacitance.
Output relay
Flow monitoring: terminals 13, 14, 15.
Wire monitoring: terminals 19, 20, 21.
Switching capacity: max. 250V AC, 4A (see Technical data, page 13).
The current must be externally limited to these values by taking appropriate meas-
ures.
External interference suppression of inductive loads is required.
Page 5
in the protection rating intrinsic safety
Voltage
[EEx ia] IIC and [EEx ia] IIB
Current
I
o
= 92mA / I
e
= 47.2mA
U
o
= 15.8V
Power
P
o
= 680 mW
in the protection rating intrinsic safety
External inductance
[EEx ia] IIC [EEx ia] IIB [EEx ia] IIB
External capacitance 185nF
1mH
1.6µF
1mH
885nF
5mH
in the protection rating intrinsic safety
Voltage
[EEx ia] IIC and [EEx ia] IIB
Current
I
o
= 84mA / I
e
= 38.5mA
U
o
= 15.8V
Power
P
o
= 680 mW
in the protection rating intrinsic safety
External inductance
[EEx ia] IIC [EEx ia] IIB [EEx ia] IIB
External capacitance 205nF
1mH
1.7µF
1mH
935nF
5mH
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