Electrical Connection; Connecting The Measuring Unit - Endress+Hauser Cerabar PMP11 Operating Instructions Manual

Electrical connection

18
6 Electrical connection
6.1

Connecting the measuring unit

6.1.1 Terminal assignment
WARNING
L
Supply voltage might be connected!
Risk of electric shock and/or explosion!
‣
Ensure that no uncontrolled processes are activated in the system.
‣
Switch off the supply voltage before connecting the device.
WARNING
L
Limitation of electrical safety due to incorrect connection!
‣
In accordance with IEC/EN61010 a separate circuit breaker must be provided for the
device .
‣
The device must be operated with a 500 mA fine-wire fuse (slow-blow).
‣
When using the measuring device in hazardous areas, installation must comply with
the corresponding national standards and regulations and the Safety Instructions or
Installation or Control Drawings.
‣
All explosion protection data are given in separate documentation which is available
upon request. The Ex documentation is supplied as standard with all devices approved
for use in explosion hazardous areas.
‣
Protective circuits against reverse polarity, HF influences and overvoltage peaks are
integrated.
Connect the device in the following order:
1. Check whether the supply voltage matches the supply voltage indicated on the
nameplate.
2. Connect device in accordance with the following diagram.
Switch on supply voltage.
For devices with a cable connection: do not close reference air hose (see (a) in the
following drawings)! Protect reference air hose against penetration by water/condensate.
4 to 20 mA output
Device M12 plug
PMP11
0.5A
PMP21 L+
2 1
PMP23
3
L–
Valve plug
0.5A
L+
1
3
4
2
L–
A0023487
A0022823
Cerabar PMP11, PMP21, PMP23
Cable
0.5A
1
L+
2
L–
3
(a)
1 brown = L+
2 blue = L-
3 green/yellow = ground connection
(a) reference air hose
Endress+Hauser
A0023783