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:
100 m. 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. 250 V AC, 4 A (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
= 92 mA / I
e
= 47.2 mA
U
o
= 15.8 V
Power
P
o
= 680 mW
in the protection rating intrinsic safety
External inductance
[EEx ia] IIC
[EEx ia] IIB
[EEx ia] IIB
External capacitance
185 nF
1 mH
1.6 µF
1 mH
885 nF
5 mH
in the protection rating intrinsic safety
Voltage
[EEx ia] IIC and [EEx ia] IIB
Current
I
o
= 84 mA / I
e
= 38.5 mA
U
o
= 15.8 V
Power
P
o
= 680 mW
in the protection rating intrinsic safety
External inductance
[EEx ia] IIC
[EEx ia] IIB
[EEx ia] IIB
External capacitance
205 nF
1 mH
1.7 µF
1 mH
935 nF
5 mH