KROHNE OPTISOUND 3040 C 4wire EN - Manual (Page 26)

4 ... 20 mA
PE
/ L
/ N
L1 N GND
1 2
1 2 3 4
4...20mA IS
Fig. 20: Wiring plan, double chamber housing
1 Supply voltage
2 Signal output
5.4 Switch on phase
After OPTISOUND 3040 C is connected to power supply, the
instrument carries out a self-test for approx. 30 seconds. The
following steps are carried out:
l
Internal check of the electronics
l
Indication of the instrument type, the firmware version as
well as the sensor TAGs (sensor name)
l
Output signal jumps briefly (approx. 10 seconds) to the set
fault current
Then the actual measured value is displayed and the
corresponding current is transmitted to the cable. 1)
1) The values correspond to the actual level as well as to the settings already
carried out, e.g. default setting.
Wiring plan
Switch on phase
26 OPTISOUND 3040 C - 4 ... 20 mA/HART - four-wire
Connecting to power supply
30515
-EN
-050914