TESTO 6681 Instruction Manual page 24

testo 6681
24
1.3.2.3
There is the option of twelve terminals for a total of four relays. The
designations NC/C/NO (normally closed contact/root or pin/normally open
contact) are etched on the surface of the board.
Using PG screw connection
1 Feed connection cables for the relays through opened M 20 x 1.5
screw connection (item (10) of Overview of terminals, chapter 1.3.2.1).
2 Strip cable ends and clamp on wire end ferrules.
3 Connect relays according to chosen function (NC/NO) (see diagrams
below; relay 1 is shown as an example of a connection).
Using plug-in connections (optional)
4
Clean the connector of the probe line and the coupling of any foreign
matter.
- 1.3 Commissioning
Connecting the relay outputs
Only have the transmitter wired and connected by authorized
personnel with the voltage disconnected.
Only insert or disconnect the plug-in connection when the
voltage is disconnected.
Do not disconnect the connector of the probe line from the
instrument for extended periods to protect against
contamination.
Relay terminal strip, item (3)
of Overview of terminals,
chapter 1.3.2.1.