Datalogic CBX500 Manuale di installazione - Pagina 12
Sfoglia online o scarica il pdf Manuale di installazione per Lettore di codici a barre Datalogic CBX500. Datalogic CBX500 16. Scanning connection box
Anche per Datalogic CBX500: Manuale di installazione (17 pagine), Manuale di installazione (17 pagine)
Stampa la pagina
CBX500 INSTALLATION MANUAL
The RS485 HD termination resistance switch enables or disables the insertion of the bus termination resistor for
RS485 Half Duplex Multidrop applications.
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 be OFF (disabled).
This switch must also be OFF (disabled) when Fieldbus Modules are used.
CAUTION
INDICATOR LEDS
There are five Indicator LEDs which signal power and I/O activity and are visible from the CBX500 outside cover.
The Power LED is blue when power is correctly applied to the CBX500 and the power switch is turned on.
This LED is red if power polarity is incorrect. In this case the connected reading device and optional Backup
Module are protected.
If external I/O devices are powered through CBX500 (connected to +V/-V), they are not
protected from polarity inversion.
CAUTION
The remaining four LEDs signal activity on the relative I/O lines. Their meaning depends on the software
configuration of the connected reading device.
12
RS485 HD
ON
OFF
Figure 11 – RS485 HD Termination Resistance Switch
blue/red
yellow
green
yellow
green
Figure 12 – Indicator LEDs