2
017-
03
30
Installation
3.7
Connecting to Power Supply and Grounding
There are two 24 V DC power supply terminal blocks located inside the WirelessHART
gateway, allowing for redundant power supply. Open the enclosure cover to access the terminal
blocks.
Figure 3.10
Power supply
1. First power supply connection
2. Second (redundant) power supply connection
3. Ground connection
Connecting to Power Supply and Grounding
1. Connect one of the grounding terminals to a ground wire. see Figure 3.10 on page 30
2. Unscrew the 4 screws of the enclosure cover. see Figure 3.8 on page 26
3. Remove the enclosure cover.
4. Ensure that appropriate power is supplied.
5. Draw the power cable through the second cable gland from right.
The permissible cable diameter lies between 6 ... 10 mm.
6. Connect the power cable to the first power supply connection "Line 1" observing polarity.
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 enclosure.
8. Connect the second power cable to the second power supply connection "Line 2"
observing polarity.
The WirelessHART gateway is connected to power supply.
9. Tighten the cable glands with appropriate torque. See table "Installation torque for cable
glands and enclosure cover" on page 31
Danger!
Explosion hazard from premature powering
Powering parts of the system during installation or maintenance leads to added currents. This
very likely results in a current flashover generating sparks. The sparks can ignite the
surrounding potentially explosive atmosphere.
Prior to installation and maintenance activities, ensure that the device is disconnected from the
power supply. Activate the power supply only after all the circuits required for operation have
been fully assembled and connected
Note!
Ensure sufficient relief of tension on the cables during installation and note the minimum
bending radii of the cables.