11
In control cabinet: Wiring temperature switch
- continued -
Connecting supply voltage
The equipment is supplied with 24 V DC and fused with an external slow-blow fuse 0.5 A. Please use a
safety power supply unit with safe electrical isolation.
The power supply unit must be electrically isolated from dangerous contact voltages and must meet at
least the requirements on double or reinforced isolation according to one of the following standards:
DIN EN 50178, DIN EN 61010-1, DIN EN 60730-1 or DIN EN 60950.
Connecting temperature sensor
To connect the equipment use screened multi-core control cable with a min. conductor size 0.5 mm
2
,
e. g. LiYCY 3 x 0.5 mm
2
, max. length: 100 m.
Wire terminal strip in accordance with the wiring diagram.
Fig. 3
Note that
only
the cable gland of the temperature sensor provides the screen.
Make sure that connecting cables leading to the equipment are segregated and run separately from
power cables.
Connecting output contacts
Wire the upper terminal strip
1
(terminals 16-23) according to the desired switching functions.
Provide an external slow-blow fuse 2.5 A for the output contacts.
When switching off inductive loads, voltage spikes are produced that may impair the operation of con-
trol and measuring systems. Connected inductive loads must be provided with suppressors such as RC
combinations as specified by the manufacturer.
Tools
n
Screwdriver size 3.5 x 100 mm, completely insulated according to VDE 0680-1.
Attention
n
Do not use unused terminals as support point terminals.
Connection for actual-value output (optional)
To connect the equipment use screened multi-core control cable with a min. conductor size 0.5 mm²,
e. g. LIYCY 2 x 0.5 mm², max. length: 100 m.
Please observe the max. load of 500 ohm.
Wire terminal strip in accordance with the wiring diagram.
Fig. 3
Connect the screen
only
once
to the central earthing point (CEP) in the control cabinet.
Make sure that connecting cables are segregated and run separately from power cables.
Any item of equipment that you want to connect to the terminals for the actual-value output 4 - 20 mA
must be certified to have at least double or reinforced isolation according to DIN EN 50178 or DIN EN
61010-1 or DIN EN 60730-1 or DIN EN 60950 (safe electrical isolation) between the current loop and
live parts of the equipment that are not supplied with safety extra-low voltage (SELV).
