B800-00-880 Issue A
Page 20 © Edwards Limited 2009. All rights reserved.
Edwards and the Edwards logo are trademarks of Edwards Limited.
Technical data
2.9 Controller connector socket
The nEXT pump has a 3-way Controller Connector Socket in the side of the Controller. When you receive the pump,
this connector will be concealed by a black protective cover. If you intend to use the connector, this cover should
be removed by levering with a small screwdriver. The mating plug for this connector is supplied with the pump.
The connector is intended to drive a vent valve or fan connected to the three pins. The connector mating plug is
shown in Figure 7, with the polarity of the pins marked when the vent valve/fan is energised.
NORMAL status output:
Type Refer t o Figure 8
< Normal speed (default 80%) Off (2.2 k internal pull up to 12 V d.c.)
Normal speed On (<0.8 V d.c. sinking 20 mA)
Current Rating
Voltage Rating
20mA to 0V
28.8Vdc maximum external pull up voltage
FAIL s t a tus ou t p ut:
Type Open collector transistor
Fail Off (3.3 k pull up to 12 V d.c.)
OK On (<0.1 V d.c. sinking 1.7 mA,
<0.8 V d.c. sinking 20 mA)
Current Rating
Voltage Rating
20mA to 0V
28.8Vdc maximum external pull up voltage
*
Mating half of connector not supplied.
Table 12 - 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
4STANDBY control input /
Serial RX/RS485A-
- Connect to Pin 2 to enable standby speed
5 Serial enable - Connect to Pin 2 to enable serial interface mode
7 FAIL / Serial TX/RS485 B+ - Logic high when fail condition exists in parallel mode
9 Analogue output Positive 0 - 10 V output proportional to measured output
10 Chassis / Screen - Screen
12 Chassis / Screen - -
15 NORMAL status output - Logic low when pump rotational speed is at normal speed or
above
8, 13, 14 Electrical supply: 0 V -
1, 6, 11 Electrical supply: 24 V Positive
Table 11 - Logic interface technical data (continued)
Logic interface item
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