Operating Instructions Chapter 5
CLV 42x bar code scanner
Electrical connection
8 009 981/O078/16-08-2004 © SICK AG · Division Auto Ident · Germany · All rights reserved 5-3
5.4 Preparations for electrical connection
5.4.1 Requirements for the host interface
The host interface of the CLV can be operated as an RS 422/485 or an RS 232 interface.
Table 5-2 shows the recommended maximum cable lengths as a function of the selected
data transfer rate.
To prevent interference, do not lay the cable parallel with power supply and motor
cables over long distances, e. g. in cable ducts.
5.4.2 Power supply
The CLV requires a power supply of 10 to 30 V DC (functional extra-low voltage) in
accordance with the standard IEC
364-4-41. The functional extra-low voltage can be
generated by using a safety isolating transformer pursuant to IEC
742. The CLV has a
power consumption of max. 3.5 W (when switching outputs are not connected).
The CLV is supplied with 10 to 30 V DC via the CDB 420 or CDM 420 connection module.
If an optional CMF 400 field bus gateway or a CMD 400 Connection Module Display is
additionally used in the CDM 420, the ICR is supplied with 18 to 30
V DC.
If the CMP 400 Power Supply Module is used in the CDM 420, a mains voltage of 100 to
250 V AC/50 to 60 Hz is required.
Note The CLV 42x is UL certificated when a class 2 power supply according to UL 1310 is used.
Power-up delay
The selected device number (default setting: 1) affects the power-up delay of the device.
This is useful if a large number of CLVs (e. g. in the SICK CAN Scanner Network) are supplied
from one power source.
Table 5-3 contains a list of the available intervals.
Tip
The device number can be selected on the DEVICE CONFIGURATION tab in the CLV Setup
program.
Interface type Transfer rate Distance from host
RS 232 up to 19,200 bd max. 10 m (32.8.ft)
38,400 to 57,600 bd max. 3 m (9.84 ft)
RS 422/485
1)
max. 38,400 bd max. 1,200 m (3,937 ft)
max. 57,600 bd max. 500 m (1,640 ft)
1) with suitable line termination according to specification
Table 5-2: Maximum cable lengths between the CLV and host
Device number GN Power-up delay Device number GN Power-up delay
1; 11; 21; 31 0 ms 6; 16; 26 2,000 ms
2; 12; 22 400 ms 7; 17; 27 2,400 ms
3; 13; 23 800 ms 8; 18; 28 2,800 ms
4; 14; 24 1,200 ms 9; 19; 29 3,200 ms
5; 15; 25 1,600 ms 10; 20; 30 3,600 ms
Table 5-3: Power-up delay as a function of the device number GN
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