Edwards nEXT730 - Connection for Serial Control and Monitoring; Figure 35 Logic Interface Connections - Parallel Control; Figure 36 Simplified Logic Interface Connections - Parallel Control

B8J200880_E - Installation
Page 73
V
3 2
4
1
2
3
4
5
6
7
8 1
9
10
11
12
13
14
15
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 mating 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 rating (up to 20 mA).
Electrical supply connection 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. Connections 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 35 Logic interface connections - parallel control
1. Optional 48 V d.c. electrical supply
2.
Optional fuse
3. Optional indicator - normal speed
4.
Optional indicator - system OK
5. nEXT pump logic interface
6.
Start switch
7. Optional standby switch
8.
Optional voltmeter to monitor
analogue output
Figure 36 Simplified logic interface connections - parallel control
1. nEXT pump logic interface 2. Start switch
3. Optional standby switch 4. Optional voltmeter to monitor
analogue output
5.6 Connection for serial control and monitoring
The serial interface allows the nEXT pump to be controlled and to be interrogated as to
its operational status using a number of serial commands or the nST2 PC software. There
is also a multi-drop mode that allows for the connection of more than one nEXT pump to
a single serial port on the control system.
2
48 V d.c.
3
4
V
7 6
8
1
1
2
3
4
5
6
7
8 5
9
10
11
12
13
14
15
CS/5038/A
CS/5056/A