Signal Cables; Optional Bus Communication Via Grundfos Cim Modules; Installing A Communication Interface Module - Grundfos Hydro Multi-E Series Installation And Operating Instructions Manual

6.7 Signal cables

• Use screened cables with a cross-sectional area of minimum
2
0.5 mm and maximum 1.5 mm
digital inputs, setpoint and sensor signals.
• Connect the screens of the cables to the frame at both ends.
The screens must be as close to the terminals as possible.
See fig. 10.
Fig. 10 Stripped cable with screen and wire connections
• Always tighten the screws for frame connections whether a
cable is fitted or not.
• The wires in the motor terminal box must be as short as
possible.
7. Optional bus communication via Grundfos
CIM modules

7.1 Installing a Communication Interface Module

DANGER
Electric shock
Death or serious personal injury
- Switch off the power supply to the motor and to the
signal relays. Wait at least 5 minutes before
starting any work on the motor. Make sure that the
power supply cannot be accidentally switched on.
Always use an antistatic service kit when handling
electronic components. This prevents static electricity
from damaging the components.
When unprotected, place the component on the
antistatic cloth.
f
Fig. 11 Antistatic service kit
10
2
for the external on/off switch,
1. Loosen the four screws (fig. 12, A) and remove the terminal
box cover (fig. 12, B).
A
B
Fig. 12 Removing the terminal box cover
2. Remove the CIM cover (fig. 13, A) by pressing the locking tab
(fig. 13, B) and lifting the end of the cover (fig. 13, C). Then lift
the cover off the hooks (fig. 13, D).
C
B
Fig. 13 Removing the CIM cover
3. Remove the securing screw (fig. 14, A).
A
Fig. 14 Removing the securing screw
4. Fit the CIM module by aligning it with the three plastic holders
(fig. 15, A) and the connecting plug (fig. 15, B). Press the
module home with your fingers.
A
Fig. 15 Fitting the CIM module
5. Fit and tighten the securing screw (fig. 14, A) to 0.96 ft-lb (1.3
Nm).
6. Make the electrical connections to the CIM module as
described in the instructions supplied with the module.
D
A
B