Connection Of Multiple Safety Mats/Bumpers; Mode Selection Switch; Potential-Free Contacts - Leuze electronic MSI 400 Operating Instructions Manual

4.1.7

Connection of multiple safety mats/bumpers

When multiple safety mats/bumpers are used to improve diagnosis, it may be wise to decouple the test
pulse outputs.
4.1.8

Mode selection switch

Electrical connection: Example from MSI.designer
Operating mode selection
switch (1 from 2) to 24 V
Operating mode selection
switch (1 from 2) to test
output
Function
Testing
NOTICE
Ä Operating mode selection switches without test pulses enable 2 to 8 operating modes; oper-
i
ating mode selection switches with test pulses enable 2 to 4 operating modes.
Ä When wiring the tested operating mode selection switches, note that when using an odd-
numbered test output (e.g. T1, T3 ... or X1, X3 ...), odd-numbered inputs (e.g. I1, I3, I5 ...)
must be used; when using an even-numbered test output (e.g. T2, T4 ... or X2, X4 ...), even-
numbered inputs (e.g. I2, I4, I6 ...) must also be used.
Ä You can find additional information in the operating instructions for the operating mode se-
lection switches.
4.1.9

Potential-free contacts

The MSI.designer software provides a series of potential-free contacts for "free" designing of contact ele-
ments. In this manner, you can implement different NO (normally open contact)/NC (normally closed con-
tact) combinations with and without testing. In addition, there are elements for a start and stop button, reset
button, and device monitoring (EDM).
Tab. 4.13: Function of potential-free contacts
Function
Testing
Series connection
Discrepancy time
Leuze electronic
Info
Possible
Info
Possible
Possible
Further information: Software manual
MSI 400
Channel 1: Contact
between 24 V and I1
Channel 2: Contact
between 24 V and I2
Channel 1: Contact
between T1 and I3
Channel 2: Contact
between T2 and I4
Connecting devices
45