440L-M8100 [ALLEN-BRADLEY]
Light Curtains; 光幕
Allen-Bradley 
Safeguarding Applications
Light Curtains
POC, 440L-M8100 (Muting), Dual Channel
+24V DC
Bulletin 100S
or 700S
POC Receiver
POC Sender
1
2
7
3
4
5
6
1
2
7
6
5
3
4
K1
K2
11
10
12
14 15
13
1
2
3
4
5
6
7
8
9
16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33
+ - + -
440L-M8100
34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66
H1
L1 L2 L3
Muting Lamp
S1
+
-
+
-
K1
K2
Restart Lamp
A1
B1
+
-
+
-
A2
B2
Four Muting
Sensors
PNP Output
M
Gnd
PE
Circuit Status
The light curtain is not detecting the presence of any objects. The output contactors, K1 and K2 are de-energized.
Operating Principle
With no object in the sensing field, pressing and releasing S1 will cause the outputs to energize.
When an object enters the sensing field, the outputs will de-energize and the restart lamp flashes.
To start muting, the protection field must be free and the outputs K1 and K2 energized.
During the muting period, the mute inputs must stay activated, without interruption, when changing from A1 & A2 to B1 & B2.
If an object remains in the protected sensing field after a power interruption, the object can be moved out of the protected field through the
actuation of a spring return, key operated switch S2 (not shown). To prevent a steady override, an additional contact of S2 can be integrated
into the control system.
Fault Detection
If either contactor K1 or K2 sticks ON, the other functioning contactor will turn the load OFF.
The outputs of the 440L-M8100 are monitored PNP outputs.
A short across S1 will prevent the operation of the output circuits.
A fault of the muting sensor will be detected so that new muting is prevented.
If the muting lamp is not connected, is defective or is shorted, muting can not be started.
18-4
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