13
13.3 Connecting the signal terminals
Connect the signal cables according to the guidelines for good
practice to ensure EMC-correct installation.
•
Use screened signal cables with a conductor gauge size of
min. 22 AWG and max. 16 AWG.
•
Use a 3-conductor screened bus cable in new systems.
Fig. 21
Wiring diagram, signal terminals
Terminals 27, 29 and 37 are not used.
13.3.2 Minimum connection, signal terminals
Operation is only possible when the terminals 18 and 20 are
connected, for instance by means of an external on/off switch or
a short wire.
Fig. 22
Required minimum connection, signal terminals
Caution
As a precaution, signal cables must be separated
from other groups by reinforced insulation in
their entire lengths.
Note
If no external on/off switch is connected, short-
circuit terminals 18 and 20 using a short wire.
T
M
03 8800 2507
+
24
V
ou
t
+
24
V
ou
t
DI
2
DI
3
DI
4
G
ND
GND
AO
1
+
10
V
ou
t
E
x
t.
s
et
po
int
S
e
ns
or
1
GND
RS-
4
8
5
G
ND
Y
R
S
-48
5
A
R
S
-48
5
B
1 K
0-
20
m
A
13.3.1 Wiring diagram, signal terminals
0/4-20 mA
0/4-20 mA
0-10 V
0-10 V
S
ta
rt/
s
to
p
Terminals
53 and 54:
See section
6.3.5
Terminal Type
Function
12
+24 V out
Supply to sensor
13
+24 V out
Additional supply
18
DI 1
Digital input, start/stop
19
DI 2
Digital input, programmable
20
GND
Ground for digital inputs
32
DI 3
Digital input, programmable
33
DI 4
Digital input, programmable
39
GND
Ground for analog output
42
AO 1
Analog output, 0-20 mA
50
+10 V out
Supply to potentiometer
53
AI 1
External setpoint, 0-10 V/0/4-20 mA
54
AI 2
Sensor input, sensor 1, 0/4-20 mA
55
GND
Ground for analog inputs
61
RS-485 GND Y GENIbus, GND
68
RS-485 A
GENIbus, signal A (+)
69
RS-485 B
GENIbus, signal B (-)
Note
The RS-485 screen must be connected to ground.
T
M
03 90
57 32
07
S
tart/st
o
p
GND
Grundfos.bk Page 13 Friday, July 30, 2010 10:10 PM
30
Grundf
os CU
E
