Rs 485 Interface - Bartec POLARIS Panel PC 19.1" User Manual

User manual
Panel PC 19.1'' and Panel PC 15''
POLARIS
Version 2.00
6.2

RS 485 interface

BARTEC supplies all the RS 485 interfaces as RS 422.
Connection of a controller via an RS 485 interface of the POLARIS Panel PC.
RS485 Modul
Terminal compartment of the POLARIS Panel PC
TxD B (TxD+)
Data Out
TxD A (TxD-)
Tx enable
RxD B (RxD+)
Data In
RxD A (RxD-)
See the interface description from the controller manufacturer for the relevant pin assignment of the controller.
If it is intended to use the RS422 as an RS485 interface, Pin 21/Pin 23 and Pin 22/Pin
must be bridged externally.
Pin 19-23, 20-24, 21-25, 22-26 are already connected inside.
In most cases, internal EMC measures allow the installation of termination resistors at
the beginning and the end of the bus line to be dispensed with.
Depending on local conditions, there might occasionally be impairments of data transfer.
E_BMS790_POLARIS_PanelPC_19+15_Rev1.doc
17
18
PE
User manual for POLARIS Panel PC 19.1" and 15"
TxD B (TxD+) / RxD B (RxD+)
TxD A (TxD-) / RxD A (RxD-)
to other POLARIS Panel PCs or
POLARIS Control
if final device
Revision 1 / Status: January, 3 , 2006 Technical data subject to change
rd
Page 28 of 46
Controller