Edwards nEXT730D - Connection for Serial Control and Monitoring

The output can be used to control other devices in the pumping system. The
output can driv
e a low power relay of up to 24 V d.c. coil rang (up to 20 mA).
4. To monitor the fail status output, connect the customer control equipment to the
fail output (pin 7) and to pin 2 of the customer logic interface mang half.
The output can be used to control other devices in the pumping system. The
output can drive a low power relay of up to 24 V d.c. coil rang (up to 20 mA).
Electrical supply connecon to pins 1, 6 and 11 is not required for the nEXT pump as it
has a dedicated pump power supply cable. The fuse is only required if a 48V d.c.
electrical supply is connected to the logic interface cable. Connecons to the electrical
supply via pins 1, 6 and 11 is required if indicators for either the normal speed or the
system OK status are required.
Figure 21 Logic interface connecons - par
allel control
1
2
3
4
5
6
7
8
9
10
11
12
13
14
1
15
5
3
4
2
CS/5056/A
8
48 V d.c.
V
7
6
1. Oponal 48 V d.c. electrical supply 2. Oponal fuse
3. Oponal indicat
or - normal speed 4. Oponal indicator - system OK
5. nEXT pump logic interface 6. Start switch
7. Oponal standby switch 8. Oponal voltmeter to monitor analogue
output
1. Oponal 48 V d.c. electrical supply 2. Oponal fuse
3. Oponal indicator - normal speed 4. Oponal indicator - system OK
5. nEXT pump logic interface 6. Start switch
7. Oponal standby switch 8. Oponal voltmeter to monitor analogue
output
Figure 22 Simplied logic interface connecons - parallel control
2
3
4
5
6
7
8
9
10
11
12
13
14
1
15
1
4
V
3
2
CS/5038/A
1. nEXT pump logic interface 2. Start switch
3. Oponal standby switch 4. Oponal voltmeter to monitor analogue
output
1. nEXT pump logic in
terface 2. Start switch
3. Oponal standby switch 4. Oponal voltmeter to monitor analogue
output
5.6 Connecon for serial c
ontrol and monitoring
The serial interface allows the nEXT pump to be controlled and to be interrogated as to
its operaonal status using a number of serial commands or the nST2 PC soware. There
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B8J200880_D - Installaon