7
SICK MSL
8 007 653/09-04-01 Technical Description • MSL © SICK AG • Safety Systems • Germany • All rights reserved
3 Function
3 Function
Both sender and receiver units are
supplied with a voltage of 24 V DC.
The sender unit contains the sender
module, which transmits the infra-
red, encoded light impulses.
3.1 Status indicator
The respective operating states are
indicated by indicators on the
sender and receiver unit of the MSL
(
fig. 3).
3.2 Diagnosis elements
The LEDs on the sender and the
receiver (or on the MSLZ) are also
used for diagnosis of the respective
operating status. See
Table 1 for
senders
up to serial number
9652xxx
and senders
from serial
number 9701xxx
(table 2).
3.3 Diagnosis aids
The indicators on the sender and
receiver unit enable rapid
troubleshooting for the Service
department.
Fig. 3: Indicators on the sender and receiver unit of the MSL multi-beam photoelectric
safety switch
amber
yellow
red
green
amber
yellow
Tab. 2: Indicators on the receiver unit or on the MSLZ
LEDs
Function / cause
green red
amber yellow
Light beam free and outputs active
Light beam broken an outputs inactive
1/s
Actuate command unit
2/s 2/s
Lockout
Contamination
Receiver unit
LED off
LED illuminated
LED flashing
LED no influence
LEDs
Function/cause
amber
yellow
Operating voltage applied
Sender active
MCC test; lockout
Operating voltage applied
8/s 8/s
Lockout: sender
1/s
MCC test
Sender active, range 15 - 70 m
Sender active, range 0,5 - 20 m
Sender unit
³
9
701
xxx
£
9
6
5
2
x
x
x
Tab. 1: LEDs on the sender: up to serial number 9 652 xxx, and from serial number
9 701 xxx
LED off
LED illuminated
LED flashing
LED no influence