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Installation
12.2.1
Power Supply and Relay Contacts
Power supply
The power supply for the Touch Panel is connected at the 4–pin plug connector
on the underside of the unit . Use the 4–pin terminal block supplied with the
TP for this purpose. The terminal block is designed for cables with a
cross–section not larger than 2.5 mm
Appendix A of information on the power supply requirements.
Relay contacts
When configured accordingly, messages on the Touch Panel can trigger visual
(TP27-6 and
and acoustic signals (lights, flashing lights, buzzer, sirens etc.) by tripping an
TP37) only
internal relay. The relay contacts are also carried to the 4–pin plug connector.
The figure below illustrates assignment of the 4–pin plug connector for the
power supply and relay contacts.
Caution
!
Temperature
A sensor monitors the temperature on the inside of the TP37. The contacts of
monitoring ( TP37
the internal relay close if the temperature exceeds the permissible limit value.
only)
The relay contacts are carried to a 2–pin plug connector. This connector can be
used to drive an external fan, for instance.
The figure below illustrates the assignment of the 2–pin plug connector.
Ground
Connect the ground connection
connection
use the grounding screwdriver supplied.
12-8
Relay contacts (NO contacts)
1 2 3 4
Rating 24 V DC; 0.4 A
(no inductive load)
GND
+ 24 V DC
With a 24 V supply, make sure that the extra–low voltage is isolated safely.
Use only power supply units complying with IEC 364-4-41 or
HD 384.04.41 (VDE 0100, Part 410).
The supply voltage must be within the specified voltage range. Voltages
outside this range can cause malfunctions.
1 2
Relay contacts (NO contacts)
Rating 24 V DC; 0.4 A
(no inductive load)
2
. Please refer to the technical data in
of the unit to the cabinet ground. To do so,
TP27, TP37 Equipment Manual
Release 01/00
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