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3.0 Application / Installation
Time switches switch ON, OFF and over connected electrical units, depending on
time, on a daily or weekly cycle and related to date.
– The time switch may only be used in dry areas
– Time switches are suitable for use in environmental conditions with nor-
mal pollution.
– The time switch (TR 642 S – TR 644 S) is suitable for mounting on the
35 mm top-hat rail (DIN EN 50022)
– TR 686/ 4 DCF timer is suitable for wall mounting
– Wall mounting with installation kit 907 0 053 (only TR 642S-TR 644S)
3.1 Safety Instruction
The connection and installation of electrical equipment may be
effected only by a qualified electrician. National regulations
and any valid safety conditions should be observed.
Interference with and changes to the product will result in can-
cellation of the guarantee.
3.2 Installation Instructions
In spite of expensive protection measures, exceptionally strong magnetic
fields can lead to the destruction of the micro-processor controlled time
switch.
We therefore recommend attention be given to the following points before instal-
lation:
– Use separate lead for the mains voltage supply.
– Suppress inductive loads with suitable RC filters.
– Do not mount product in direct proximity to sources of interference as e. g.
transformers, contactors, PCs and TV and communication equipment.
– After suffering intereference, we recommend, before re-setting, a RESET with a
new initial set up (chapter 5.3).
– Strongly heat-generating products on the right side of the product shorten the
life of the battery.
3.3 Electrical Connection TR 642 S / TR 644 S
National regulati-
ons and any valid
safety conditions
must be observed.
