Emerson Damcos, Service Manual

Page: 133 / 144

Damcos LPU: LPU P-NET System Service Manual
February 2017 SM 8000-100-01 Ed 04
133
PCB Diagram for Stand Alone Unit
Apart from being controlled by the P-NET the LPU can be used as a stand-alone unit without P-NET
but controlled by hardwired inputs/outputs (24 VDC supply must be connected). 24 V DC I/O can be
used directly i.e. from PLC. P-NET is applied in connection with end testing, for configuration and test
only.
Control follows by means of voltage inputs. Position feedback signal from relay outputs or a 4-20 mA
transmitter.
N
L
L
N
LPU
Gnd
Open feed back
Common feed back
Closed feed back
Common command
Close command
Open command
230 V AC
4-20mA
P-NET
A
P-NET
B
+24 V DC
B
Gnd
A
+24 V DC
8
2
1
7
3
4
5
6
Valve
position
14
10
11
12
13
9
15
Close
Gnd
Open
Closed
Open
+24 V DC