26
testo 6651 Ethernet
-
1.3 Commissioning
The channel 3 shown on the circuit board cannot be used
with this instrument.
Requirement for the connecting cable of the supply:
Insulated with cross-section of at least 0.25 sq. mm.
The supply line must be secured against exceeding 8 A.
An OFF switch must be installed in an easily accessible
position close by and be marked as such.
4 Feed connection cables of the two channels through opened M 16 x
1.5 screw connection (item
(7)
of
Overview
of terminals
, chapter
1.3.3.1, page 24
).
5 Strip the cable ends, clamp wire end ferrules on and screw to channel
terminals as shown in diagram.
6 Close M 16 x 1.5 screw connection (item
(7)
in
Overview
of terminals
,
chapter 1.3.3.1, page 24
).
1.3.3.3
Connecting the relay outputs
Only have the transmitter wired and connected by authorized
personnel with the voltage disconnected.
Relay terminal strip (item
(3)
of
Overview
of terminals
,
chapter 1.3.3.1, page 24)
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 M 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 1.3.3.1,
page 24).
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).
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