PSC LazerData 12000 Series, Installation Manual

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LazerData
®
12000 Scanner Installation Manual
2.16 - Installation
RS485-polled interface
The RS485-polled interface is a Half Duplex (3 wires + shield) interface. The
polled configuration can be used for multidrop connections with a PSC Automation
multiplexer or also for a master-slave layout (see section 2.9.1).
The following pins of the 25-pin connector are used for RS485-polled
communications:
Pin Name Function
2 TX485+ RS485 input/output (+)
4 TX485- RS485 input/output (-)
7 SGND Signal Ground
12000 Scanner
MULTIPLEXER
TX485+
2
TX485-
4
+ RTX485
- RTX485
7
SGND
RS485REF
Figure 2.18 - RS485-polled connections
To select this interface type, follow the instructions in sections 2.3 and 2.4.
For this interface type, the multidrop address must also be set on the DIP switch as
shown in Fig. 2.19 below. Record this information for further setup of the
multidrop line.
SW1
SW2
SW3
SW4
SW1
Figure 2.19 - DIP switch for multidrop address selection