Mitsubishi MELSEC-WS series, User Manual

Page: 51 / 152

Chapter 4
48
Connecting devices
4.1 Safety command devices and electro-mechanical
safety switches
4.1.1 Emergency stop pushbuttons (e.g. SICK ES21)
Electrical connection: Example from Setting and Monitoring Tool with WS0-XTIO
Single-channel,
connected to 24 V Contact between 24 V and I1
Single-channel,
connected to test
output Contact between X2 and I2
Dual-channel,
connected to 24 V Channel 1: Contact between 24 V and I3
Channel 2: Contact between 24 V and I4
Dual-channel,
connected to test
output Channel 1: Contact between X1 and I5
Channel 2: Contact between X2 and I6
The dual-channel emergency stop pushbuttons preconfigured in the Setting and
Monitoring Tool have equivalent switching contacts. Corresponding elements for
implementing dual-channel complementary switching contacts are available in the
element window under the group named “Potential-free contacts and restart”.
Function Notes
Testing Possible
Series connection/ cascading If emergency stop pushbuttons are connected in series, the
max. line resistance shall not exceed 100 Ω (see Chapter 12).
Discrepancy times See Setting and Monitoring Tool.
Further information is available in the manual for the emergency stop pushbutton,
SICK ES21 or in the manuals for devices used.
Table 19:
Connection of emergency
stop pushbuttons
Table 20:
Functions of emergency
stop pushbuttons
Note