TESTO 6681 Profibus, Инструкция по эксплуатации

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testo 6681
- 1.3 Commissioning 23
If the channels have to be galvanically isolated, a separate
mains unit must be used for each channel.
Wiring diagram for 4-wire system
(0 to 20 mA/4 to 20 mA/0 to 1 V/0 to 5 V/0 to 10 V)
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.
1 Feed connection cables of the two, or optionally three, channels
through opened M 16 x 1.5 screw connection (item (8) in
Overview
of
terminals
, chapter 1.3.2.1
).
2 Strip the cable ends, clamp wire end ferrules on and screw to channel
terminals as shown in diagram.
3 Close M 16 x 1.5 screw connection (item (8) in
Overview
of terminals
,
chapter 1.3.2.1
).
0 V
20 to
30V
AC/
DC
2 or 3 channels
0 to 20 mA/
4 to 20 mA/
max. load per 500
Ω
0 to 1 V/0 to 5 V/0 to 10 V