Electrical Connection; Voltage Supply; Pin Assignment Of The Connection Cable; Switching Input/Switching Output - Leuze electronic CR55M2/R2 Operating Instructions Manual

5

Electrical connection

CAUTION
Safety notices
 The bar code reader is completely sealed and must not be opened.
 Do not try to open the device under any circumstances, as this voids both degree of protection IP 54
and the warranty.
 Before connecting the device, be sure that the supply voltage agrees with the value printed on the
name plate.
 Connection of the device and maintenance work while under voltage must only be carried out by a
qualified electrician.
 The power supply unit for the generation of the supply voltage for the bar code reader and the corre-
sponding 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.
 If faults cannot be corrected, the device should be removed from operation and protected against pos-
sible commissioning.
5.1

Voltage supply

The bar code reader is designed for connection to a 5 V supply voltage.
• +5 V DC (red)
• GND (violet)
Available as an accessory is an adapter circuit board with spring terminals and 9-pin SUB-D socket; see
chapter 12.2 "Accessories".
• With the adapter circuit board, the conductors of the connection cable can be contacted via the
spring terminals and connected to the PC via the 9-pin SUB-D socket with an RS 232 interconnec-
tion cable.
• With the adapter circuit board, the voltage supply from 10 ... 30 V DC can be fed in via spring termi-
nals or, alternatively, 5 V DC can be fed in via a micro USB connector.
5.2

Pin assignment of the connection cable

Wire Assignment
Red +5V DC
Violet GND
Black SW OUT
Orange SW IN
White RS 232 RxD
Green RS 232 TxD
5.3

Switching input/Switching output

The bar code reader is provided with a switching input and a switching output.
• The switching input is used to trigger reading.
• The switching output signals successful code reading.
5.3.1

Switching input

By means of the SW IN switching input connection, you can trigger a read process in the standard setting
(low = active) with the connection SW IN (orange) and GND (violet). We recommend wiring a 2.2 kΩ "pull-
up" resistor as defined cable termination; see figure 5.1.
Leuze electronic
Description
Operating voltage 5V DC
Operating voltage 0V DC / reference ground
Switching output
Switching input
RxD signal line of the RS 232 interface
TxD signal line of the RS 232 interface
CR 55
Electrical connection
IN
IN
OUT
IN
IN
OUT
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