22
1981
2011
-0
7
32
WHA-GW-*
Installation
7. If you want to connect a redundant power supply (optional), draw the second power
cable through the cable gland on the far right of the housing.
8. Connect the second power cable to the second power supply connection "Line 2"
observing polarity.
The Gateway is connected to power supply.
The green power LED may remain off for
up to 40 seconds after connection to power (system boot-up).
9. Tighten the cable glands with appropriate torque (see table "Installation torque cable
glands" on page 32).
10.Seal empty cable glands with the provided plugs.
Installation torque cable glands
Note!
The tightening torques of cable glands depend on what type of cable is used and must
therefore be determined by the user. The cap nuts must be securely tightened. Tightening
the cap nuts too tight can have a negative effect on the protection class. The following
figures should be taken as rough guides only.
Type of cable glands
Installation torque cable glands
Plastic
2.5 Nm
Nickel plated brass
4.11 Nm
Stainless steel
4.11 Nm
Table 3.4Installation torque cable glands
Danger!
Check cable glands
The IP degree of protection can not be ensured if the cables and cable glands are not fitted
correctly.
To ensure the IP degree of protection
•
all screws of the housing / housing cover must have been tightened with the appropriate
torque,
•
only cables of the appropriate size must be used in the cable glands,
•
all cable glands must be tightened with the appropriate torque,
•
all seals must be undamaged and fitted correctly,
•
all empty cable glands must be sealed with appropriate plugs.
