Electrical Connection; Connecting The Measuring Unit - Endress+Hauser Ceraphant PTP31B Operating Instructions Manual

Ceraphant PTP31B, PTP33B
Endress+Hauser
6

Electrical connection

6.1

Connecting the measuring unit

6.1.1 Terminal assignment
WARNING
L
Risk of injury from the uncontrolled activation of processes!
‣
Switch off the supply voltage before connecting the device.
‣
Make sure that downstream processes are not started unintentionally.
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 630 mA fine-wire fuse (slow-blow).
‣
Protective circuits against reverse polarity are integrated.
NOTICE
Damage to analog input of PLC resulting from incorrect connection
‣
Do not connect the active PNP switch output of the device to the 4 to 20 mA input of a
PLC.
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.
1 x PNP switch output R1
M12 plug
0.63A
L+
2 1
R1
3 4
L–
A0029268
Valve plug
0.63A
L+
1
3
4
R1
2
L–
A0023271
Electrical connection
Cable
0.63A
1
L+
2a
R1
3
L–
4
2b
(a)
1 brown = L+
2a black = switch output 1
2b white = not assigned
3 blue = L-
4 green/yellow = ground
(a) reference air hose
A0022801
19