General Description; Electrical Connection - Grundfos MC 40 Instrucciones De Montaje

Before fitting the module, these fitting instructions should be stud-
ied carefully. The installation and operation should also be in ac-
cordance with local regulations and accepted codes of good
practice.
For further information, see installation and operating instructions
for the pump UPE Series 2000.

1. General description

The bus module MB 40/60 is an expansion module for UPE 25-40,
UPE 25-40 A, UPE 25-60, UPE 25-60 A, UPE 32-40 and UPE 32-60.
The bus module enables serial communication with the pump via an RS-485
input. The communication is carried out according to the GRUNDFOS bus
protocol, GENIbus, and enables connection to the GRUNDFOS Pump
Management System 2000, a building management system or another type
of external control system.
In addition to the RS-485 input, the bus module has three inputs for external
signals for the forced-control functions:
• Start/stop of pump.
• Max. curve duty.
• Min. curve duty (night-time duty).

2. Electrical connection

The electrical connection and protection should be carried out in accordance
with local regulations.
Never make any connections in the pump terminal box unless the
electricity supply has been switched off for at least 5 minutes.
Carry out the mains connection as shown in fig. 1.
Note: If no external on/off switch is connected, the connection across termi-
nals 7 and 8 should be maintained.
• Wires connected to
- inputs 7 to 10 and
- supply terminals
must be separated from each other and from the supply by rein-
forced insulation.
• All leads connected to a terminal block must be tied up at the
terminals.
6