Siemens SIPART PS2 6DR50 Series, Manual

Page: 35 / 160

Design and Functional Principle
35
SIPART PS2 Manual
A5E00074631--06
2.7.6 Mechanical limit switch module
The mechanical limit switch module contains the following:
S
A binary output for the output of a group error message)
S
Two switches for signaling two limit values that can be set mechani-
cally. These two switches are electrically independent from the rest
of the electronic system.
The installation has to be carried as follows (figure 2-11, page 28):
!
WARNING
When the mechanical limit switch module is run with AC > 16 V or
DC > 35 V (low voltage), the housing must be protected against
mechanical actions of > 1 Joule, since otherwise the proper functioning
of the IP66 protective system is not guaranteed.
!
DANGER
When the module is supplied with low voltage, you must observe the
basic safety rules before beginning work on the device, such as:
1. Deenergizing the module by disconnecting it via the disconnecting
device located directly upstream from the module
2. Securing it against being turned on again
3. Ensuring that the module is disconnected from the voltage supply
CAUTION
The following maximal values only refer to the clamps 41 and 42 as
well as the clamps 51 and 52.
Maximal voltage (not Ex)
AC 250 V or DC 24 V
Maximal current (not Ex) AC/DC 4 A
Maximal voltage (Ex) DC 30 V
Maximal current (Ex) DC 100 mA
When you supply one circuit breaker with extra-low voltage (AC <16 V
or DC 35 < V) and the other with low voltage, you ensure that the ca-
ble insulation is doubled.
When operating the switch with low voltage, you must position the low
voltage circuits so that they are separated from the extra-low voltage
circuits.
Installation