
Electrical connection
Leuze electronic
DCR 50
11
5
Electrical connection
CAUTION
Safety notices
Ä
Before connecting the device, be sure that the supply voltage agrees with the value printed
on the name plate.
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Connection of the device and maintenance work while under voltage must only be carried
out by a qualified electrician.
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The power supply unit for the generation of the supply voltage for the scan engine and the
corresponding connection units must have a secure electrical insulation according to
IEC 60742 (PELV). For UL applications: only for use in class 2 circuits according to NEC.
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If faults cannot be cleared, the device should be switched off and protected against acciden-
tal use.
5.1
Voltage supply
The scan engine is designed for connection to a 5 V supply voltage.
• +5 V DC (pin 1)
• GND (pin 2)
A MA-CR Modular adapter unit (interface device-to-host to connect to a PC for evaluation, 50128204) with
spring terminals, Molex connector, and D-SUB 9-pin socket is available as an accessory (see chapter 13.2
"Accessories").
• With the MA-CR Modular adapter unit, the 6-pin connector of the scan engine can be contacted via a
150 mm long interconnection cable with a 12-pin Molex terminal strip and connected to the PC via the
D-SUB 9-pin socket using an RS 232 interconnection cable.
• With the MA-CR Modular adapter unit, the voltage supply of 10 … 30 V DC can be fed in via spring ter-
minals or, alternatively, 5 V DC can be fed in via a micro USB connector.
5.2
Pin assignment
Pin
Signal
IN / OUT
1
VCC / +5 V DC
IN
2
GROUND
IN
3
TRIGGER
IN
4
GOOD READ
OUT
5
RS 232 TX
OUT
6
RS 232 RX
IN
5.3
Switching input / switching output
The scan engine has a switching input and a switching output.
• The switching input is used to trigger code reading.
• The switching output signals successful code reading.
5.3.1
Switching input
A read process can be triggered using the trigger input (pin 5) in the
standard setting
(low = active) via the
connection to GND (pin 2). We recommend wiring a 2.2 kΩ pull-up resistor as defined cable termination.