2.2 Installation and parameter setup
2.2.1 Wiring installation
Terminals for NEL and GB feedback have been changed. The table below shows an overview of the terminals
on PPU-2 and PPU-3.
General de-
scription
Terminal
PPU-2
Terminal descrip-
tion
Terminal
PPU-3
Terminal descrip-
tion
Note
Power supply 1 24 V DC (+) 1 24 V DC (+)
Power supply 2 0 V DC (-) 2 0 V DC (-)
Non-essential
load trip
5 + 6 Relay 1 (NO) 8 + 9 Relay 8 (NO) Difference be-
tween the ter-
minals
Generator
breaker trip
alarm
11 + 12 Relay 3 (NO) 11 + 12 Relay 11 (NO)
Breaker off/trip 14 + 15 Relay 4 (NO) 14 + 15 Relay 14 (NO)
Breaker close 17 + 18 Relay sync (NO) 17 + 18 Relay 17 (NO)
Alarm ack. 24 Digital input 24 Digital input
Start sync/
control
25 Digital input 25 Digital input
Common for
terminals
23-27
28 Common 28 Common
Modbus RTU
RS-485
29
30
31
DATA +
DATA GND
DATA -
29
30
31
DATA +
DATA GND
DATA -
Load sharing 37
38
39
Active load sharing
Common
Reactive load shar-
ing
37
38
39
Active load sharing
Common
Reactive load shar-
ing
External f/P set
point
40
41
f/P set point
Common
40
41
f/P set point
Common
De-load 43 Digital input 43 Digital input
Man. GOV
control up
44 Digital input 44 Digital input
Man. GOV
control down
45 Digital input 45 Digital input
Mode 1 48 Digital input 48 Digital input Fixed frequen-
cy/configurable
Mode 2 49 Digital input 49 Digital input P load sharing/
configurable
ML-2 application notes Converting PPU-2
to PPU-3 4189341126 UK
Application and installation
DEIF A/S Page 11 of 18
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