Datalogic C-BOX 100, Руководство по установке

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INSTALLATION
11
2
2.4.4 Scanner Selection
The following figure indicates the correct switch position for each type of scanner.
A
DS1100
DS2200
Other Devices
B
Figure 10 - Scanner Selection
The switch S3 must be set to A only when a DS1100 or a DS2200 scanner (10-30 V
version) is connected. For all the other scanners the switch S3 must be set to B.
2.4.5 RS485 Bus Termination
ON
S2
OFF
Figure 11 - Termination Resistance Switch
The switch S2 enables or disables the insertion of the bus termination resistor for
RS485 Half Duplex Multidrop applications.
CAUTION
In Multiplexer applications the termination resistor must be enabled
ONLY on the last device of the chain, the farthest away from the
Multiplexer (assuming the Multiplexer is the first device of the
chain). On all the other devices this resistor MUST NOT be enabled
(S2 = OFF).
Normally it is not necessary to enable the terminator resistor (S2
always OFF); it is suggested only in applications where the
communication speed or the bus length are critical parameters.