3 Electrical installation
3.1 Pin assignments
AFB-CAN (19-pin male connector)
Pin Wire color Pin assignment
1 BN + (L+)
2 BU - (M)
3 WH SyncA
4 GN SyncB
5 YE In1
6 GY In2
7 PK In3
8 RD In4
9 BK Q1
10 VT Q2
11 GY/PK Q3
12 RD/BU Q4
13 WH/GN CAN H1
14 BN/GN CAN L1
15 WH/YE CAN H2
16 YE/BN CAN L2
17 WH/GY CAN GND
18 BN/GY In: CAN offset
19 - n. c.
Make the electrical connections using suitable connecting cables, in line with the
connection diagram.
The sensors must be connected in a voltage-free state (UV = 0V).
DC: 24VDC ± 20%
Limit values; max. 8A for operation in a short-circuit protected network.
4 Commissioning
Alignment and teach-in of sensitivity for the MLG-2
For initial commissioning, the alignment aid is activated in the factory.
NOTE
When the alignment aid is activated, the outputs are deactivated (no change
in their status). As a result of the teach-in process, the sensitivity is stored.
Following this, the alignment aid is automatically deactivated and the device
switches to operating mode.
The yellow LED on the front of the receiver and the Alignment LED show the rough
alignment.
ôFõ 3Hz yellow Optimizing the alignment of the MLG-2
oWhen the yellow LED and the Alignment LED go out, the
MLG-2 is optimally aligned.
NOTE
With the MLG-2 Pro, the configuration software SOPAS ET will support you
with alignment and teach-in of the sensitivity. (Software not included with
delivery. Download from website www.sick.com > Service & Support > Soft‐
ware).
Now fix the position of the sender and receiver.
Press the Teach pushbutton (<1s).
ôFõ1Hz yellow The yellow LED on the front of the device and the Alignment
LED flash slowly.
After a successful teach-in process, all LEDs on the control panel go out, as does
the yellow LED on the front of the device. The MLG-2 is operational.
If the teach-in process is unsuccessful, all LEDs on the control panel flash (except
for the Ethernet status LEDs), as does the red LED (10Hz) on the front of the
device.
Check that the MLG-2 is correctly aligned, that the front screens are clean, and
that there are no objects located in the light path.
Then carry out the teach-in process once again.
5 Troubleshooting
For troubleshooting, see Chapter 11 of the operating instructions for the MLG-2
Pro (8016616).
6 Maintenance and care
The product is maintenance-free. Check the plastic screen on the sender and
receiver for contamination at regular intervals.
7 Disassembly and disposal
Any device which can no longer be used must be disposed of in an environmen‐
tally friendly manner in accordance with the applicable country-specific waste
disposal regulations. As it is categorized as electronic waste, the device must
never be disposed of with household waste.
8 Technical data
Performance data
Description Value
Voltage supply UBDC 15 ... 30V1
AFB current consumption <120mA
Max. length cable
between AFB and MLG
2.7m
I/O modules controllable
via CAN24 outputs, 4 inputs
Output current IA max. 100mA per output
CAN data interface CAN 2.0 (A/B)
CAN operating MODE Customized protocol
Resistance to backlight 50,000lx (continuous illumination)
Protection class III
Circuit protection A, B, C3
Enclosure rating IP 65
Ambient temperature Operation -30 °C ... +55°C
Storage -40°C ... +70°C
Mechanical resistance Vibration: 5g/10–55/s
Max. length cable
between AFB and MLG
2.7m
1Limit values
2For inputs: connection of equipment compliant with protection class III only
3A = UV connection reverse polarity protected
B = Output short-circuit protected
C = Interference suppression
NOTE
•The MLG-2 complies with the EMC requirements for the industrial sector
(Radio Safety Class A). It may cause radio interference if used in a
residential area.
•Do not lay cables parallel to other cables, especially not to devices with
a high level of radiated emission, such as a frequency converter.
•When using cables over 15m in length, or in locations with a high level
of interference, we recommend using a T-connector in order to connect
the sender and receiver via a short synchronization cable wherever
possible.
8023460.1HRD/03.03.2023/de, en MLG-2 – AFB / CAN | SICK 2
