Installation
9
Fig. 3:
Make the flange connection
Remove the protective cover, which is required during maintenance work.
Make the flange connection.
5.2
Electrical connection
Controllers
The smallest presentable reading is 5 • 10
-4
hPa at operation with Pfeiffer Vacuum con-
trollers.
Fig. 4:
Connect TPR 270
Connect the transmitter to the control unit using the connection cable.
Secure the plug at the transmitter with the existing screw.
Other use
The transmitter can also be operated with other control devices. In this case a sensor
cable (shielded) must be made by the user. For cable lengths up to 10 m (with 0.25 mm
2
conductor cross section), the measuring signal can be read directly between analog out-
put (pin 2) and ground (pin 5). For longer sensor cable lengths, we recommend a differ-
ential measurement between analog output and analog ground (pin 3). As a result of the
voltage drop along the supply cable grounding lead, the common mode signal is approx.
0.5 V at the max. permissible cable length.
VA
CU
UM
NOTICE
Damage to the transmitter!
Only connect the connection cable when de-energized.
Never establish a connection to the transmitter using a live cable.
VAC
UU
M
