Use the screen lead/signal ground (earth) of the shared communication cable.
c) Connect the level switch signal from drive 1.
d) Connect terminal 4 on drive 2 to terminal 4 on drive 3.
Ext block
+24V
Alarm reset
High
level
in
Gnd
T2 in
Lvl signal
out
Gnd Lvl signal
in
Active pump Inhibit in Inhibit out
+ 10V
1 2 3 4 5
6 7 8 9
10 11 12 13
Control Terminal Unit 1
Relay
1
NO
Relay
1
Com
Relay
1
NC
Relay
2
Com
Relay
2
NO
14 15 16 17 18
Relay Terminal Unit 1
Ext block
+24 V
Alarm reset
High
level in
Gnd
T2 in
Lvl signal
out
Gnd Lvl signal
in
Active pump Inhibit
in
Inhibit
out
+ 10V
1 2 3 4
5 6 7 8 9
10 11 12 13
Control Terminal Unit 2
Relay
1
NO
Relay
1
Com
Relay
1
NC
Relay
2
Com
Relay
2
NO
14 15 16 17 18
Relay Terminal Unit 2
Ext block
+24 V
Alarm reset
High
level in
Gnd
T2 in
Lvl signal
out
Gnd Lvl signal
in
Active pump Inhibit
in
Inhibit
out
+ 10V
1 2 3 4 5 6
7 8 9 10 11 12 13
Control Terminal Unit 3
Relay
1
No
Relay
1
Com
Relay
1
NC
Relay
2
Com
Relay
2
NO
14 15 16 17 18
Relay Terminal Unit 3
WS007550C
Install an optional module
Make sure that the module is correctly installed before powering on the drive.
1. Remove the plastic cover.
2. Insert the module in the module port.
3. Remove the terminal block header.
4. Connect the leads.
5. Fasten new terminal block header.
Wiring examples of relay contacts
The following illustrations show examples of how to install A-sum alarm and pump
running relays. These examples require that the P6-19:Relay output 1 and P6-20:Relay
output 2 parameters are used with their default settings.
Table 7: Relay configuration
Relay
Configuration
Relay 1
A-sum alarm
Relay 2
Run signal
External A-sum alarm
14 15 16 17 18
VFD 2 Relay
14 15 16 17 18
VFD 1 Relay
-
-
+
+
+24 V
+0 V
Gnd
DC
WS003592
14 15 16 17 18
VFD 3 Relay
Electrical Installation
SRC 311 - SmartRun
™
Installation, Operation, and Maintenance Manual
29
