SICK LE20 Instrucciones De Operación página 308

Chapter 5
Safety evaluation unit LE 20 and LE 20 Muting
Pin-No. Marking
1 +24 V DC
2 0 V
3 TEST EXTERN
4 SENSOR A*)
5 TEST/NON
6 SENSOR B*)
7 RES
8 EDM
9 nc/Override
10 EDM DISABLE
11 RES DISABLE
12 TEST A
13 TEST B
14 nc/
OVERRIDE LAMP
15 OSSD 1
16 OSSD 2
Tab. 5-1: Terminal assignment of the evaluation unit LE 20 and LE 20 Muting, nc = not connected
Note
3 0 8
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Electrical installation
Meaning ( I = input, O = output)
Supply voltage, +24 V DC
Supply voltage, 0 V
I: LE 20 system self-test = 24 V (external test deactivated);
LE 20 system external test = 0 V (external test activated);
connection to 24 V DC with NC contact
I: Connection to output (PNP or OSSD 1/2) of photoelectric switch from channel A
I: 0 V = testable sensors
24 V = photoelectric switch type C 2000, M 2000
I: Connection to output (PNP or OSSD 1/2) of photoelectric switch from channel B
I: Restart interlock, connection for NO contact (24 V) of reset pushbutton,
without restart interlock: nc
I: External device monitoring,
Terminal for connecting two NC contacts of switching contacts in series
to 24 V; connect EDM to 24 V if EDM DISABLE is deactivated.
Not connected with LE 20 without muting/
I: Connection for NO contact of override pushbutton, 24 V
I: External device monitoring, 0 V = activated, 24 V = deactivated
I: Restart interlock, 0 V = activated, 24 V = deactivated
O: Test signal of photoelectric switch to channel A.
O: Test signal of photoelectric switch to channel B.
Not connected with LE 20 without muting/
Output for override lamp, 24 V, PNP, Imax = 500 mA
O: Supply connection 1, PNP, 500 mA
O: Supply connection 2, PNP, 500 mA
*) If only one pair of photoelectric switches is connected, a wire link
must be connected between SENSOR A (4) and SENSOR B (6).
Operating Instructions
Safety Evaluation Unit LE 20
8 008 685/Q913/2007-05-21