Figure 19
RS485 mul-drop connecon
1. RS485 interface on control equipment 2. nEXT pump logic interface
Motor controller auxiliary connector socket
The nEXT85 pump has a 4-way auxiliary connector socket on the side of the motor controller.
The
mang plug for this connector is available pre-ed to a number of accessories or as an
accessory on its own (refer to Accessories for the nEXT85 on page 78.
The connector is intended to power a vent valve and/or fan. The connector is shown in Figure
20 on page 102, with the polarity of the pins marked when the vent valve or fan are energised.
The auxiliary connector output is regulated to 24 V d.c. to control the accessories, even when
the pump is operang from a 48 V d.c. supply and is protected against overload and short
circuits. If the auxiliary load current exceeds the value in Table 48 on page 101, the output will
shut down to protect the motor controller.
Table 48
Motor controller technical data
Descripon Data
Connector plug Phoenix part number SACC-DSI-M 8FS-4CON-M12/0.5
Voltage output 24 V d.c. -25%, +10% (18 V d.c. to 26.4 V d.c.)
Current output 500 mA
The motor controller connector provides two independently congured and controlled
outputs, Aux output 1 and Aux output 2. This enables any combinaon of fan or vent valve
accessory to be connected, congured and controlled appropriately. Aux output 1 is congured
via Vent opon 1 and Valve 1 type and Aux output 2 is congured via Vent opon 2 and Valve 2
type (refer toVent valve control on page 45). Aux output 1 has default sengs for a normally
open vent valve and Aux output 2 has default sengs for a fan.
B8G0-00-880A - Technical Reference
Page 101
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