7
Chapter 3. Wiring
CAUTION
Switch off power supply before installing or connecting the device. Failure to observe this
may result in destruction of parts of the electronics.
When installing Ex-approved devices in a hazardous area please take special note of the
instructions and connection schematics in the respective Ex documentation added to
these Operating Instructions. Your supplier is available for assistance if required.
Do not occupy the display connection. An incorrect connection can destroy the
electronics.
A Phillips head screwdriver is required to wire the head transmitter with screw terminals. A
flat-bladed screwdriver must be used for the version with spring terminals.
Handling Precautions:
f
Do not overtighten the screw terminals, as this could damage the
transmitter.
f
Maximum torque = 1 Nm (¾ pound-feet).
For wiring a mounted head transmitter, proceed as follows:
1. Open the cable gland and the housing cover on the terminal head or the field housing.
2. Feed the cables through the opening in the cable gland.
3. Connect the cables as shown in Fig. 3-1. If the head transmitter is fitted with spring terminals.
4. Retighten the cable gland and close the housing cover.
5. In order to avoid connection errors always take note of the hints given in the section connection
check!
3-1. Quick wiring guide
-
+
+
1
-
2
7
6
5
4
3
1
2
7
6
5
4
3
Sensor input 2
Sensor input 1
Bus connection
and supply voltage
Display connection
TC, mV
RTD,Ω:4-, 3- and 2-wire
RTD,Ω: 3-and 2-wire
TC, mV
white
red
red
white
white
red
red
Fig. 3-1. Wiring the head transmitter
Handling Precautions:
ESD - electrostatic discharge. Protect the terminals from electrostatic discharge.
Failure to observe this may result in destruction or malfunction of parts of the
electronics.
