Endress+Hauser WirelessHART Fieldgate SWG70 - Cable Glands and Housing Cover

WirelessHART Fieldgate SWG70 Electrical Installation
Endress + Hauser 27
Connecting to RS-485 1. Switch off the power supply.
2. Unscrew the screws of the housing cover and remove the housing cover. See Figure 4-5
on page 21.
3. Route the RS-485 cable through the first cable gland from left.
The permissible cable diameter is between 6 mm and 10 mm.
4. Connect the RS-485 cable to the left terminal block labeled "RS-485" as follows (see the
graphic above):
5. For a daisy-chain connection, route the second RS-485 cable through the second cable
gland from left and connect it to the right terminal block labeled "RS-485", see table
above.
6. To activate the RS-485 termination, set DIP switch number 7 to "ON". See Chapter 6.1.3
"DIP switches" on page 31.
7. Screw the housing cover on the housing.
8. Tighten the cable gland with appropriate torque. See Chapter 5.5 "Cable glands and
housing cover" on page 27.
5.5 Cable glands and housing cover
The degree of protection cannot be achieved 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.
The tightening torques of cable glands depend on what type of cable is used and must there-
fore 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 can
be taken as rough guides.
The Fieldgate housing cover must be tightened with a torque of 2.5 Nm.
Wire RS-485 cable Fieldgate terminal Remarks
RxD/TxD– (RS-485 A) A RS-485 differential
signal
RxD/TxD+ (RS-485 B) B
Shield SHD Cable shielding
Type of cable gland Approx. installation torque
Plastic 2.5 Nm
Nickel-plated brass 4.1 Nm
Stainless steel 4.1 Nm