Edwards nEXT85 User Manual

Logic interface items
OK
On (< 0.1 V d.c. sinking 1.7 mA,
< 0.8 V d.c. sinking 20 mA)
Current rang 20 mA to 0 V
Voltage rang 28.8 V d.c. maximum external pull up voltage
*
Mang half of connector not supplied.
Refer to the following table for Logic Interface connector pins for the electrical connecons.
Table 44
Logic interface connector pins
Pin
number
Signal Polarity Use
2 0 V Control reference - 0 V reference for all control and status signals
below.
3 START/STOP control
input
- Connect to Pin 2 to start pump.
4 STANDBY control
input / Serial RX/
RS485 A-
- Connect to Pin 2 to enable standby speed when
serial enable is inacve and RS485/RS232 switch
is in the RS232 posion.
5 Serial enable - Connect to Pin 2 to enable the serial link.
7 FAIL / Serial TX/RS485
B+
- Logic high when fail condion exists and serial
enable is inacve and RS485/RS232 switch is in
the RS232 posion.
9 Analogue output Posive 0 - 10 V output proporonal to measured
output.
10 Chassis / Screen - Screen
12 Chassis / Screen - -
15 NORMAL status output - Logic low when pump rotaonal speed is at
normal speed or above
8, 13, 14 Electrical supply: 0 V - -
1, 6, 11 Electrical supply: 24 -
48 V d.c.
Posive -
B8G0-00-880A - Technical Reference
Page 93

Edwards nEXT85 Specifications

General

Brand	Edwards
Model	nEXT85
Category	Water Pump
Language	English