EverFocus EBC890, Руководство пользователя

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Fig. 19. Connections of Multiple Controllers
A brief overview of the installation:
1. Connect the EverAccess desktop reader to the computer via USB port.
2. Connect one or two controllers to the desktop reader via RJ45 port.
3. More controllers can be connected to each controller by RS485 bus.
RS485 Bus Extension
Multiple controllers can be connected to each other using an RJ45 network cable. Simply
connect A to A, B to B and GND to GND on all controllers. In order to correctly transfer
data, the controllers on the RS485 bus must be connected in a daisy chain format, as shown in
the below figure.
Fig. 20. The Daisy Chain Connection Controller to Controller
Two common INCORRECT connection methods are displayed in Fig. 21 as well.
EverAccess EverAccess
SYS
7 8 9
6 5 4
1 2
A B C D E F
3
G H I J K L M N O
PQR S T U V WXYZ
CLR 0
ARM
ENT ENT
ARM
0 CLR
WXYZ T U V PQR S
M N O J K L G H I
3
D E F A B C
2 1
4 5 6
9 8 7
SYS
EverAccess
EverAccess
ARM
ENT 0 CLR
WXYZ T U V PQR S
M N O J K L G H I
3
D E F A B C
2 1
4 5 6
9 8 7
SYS
SYS
7 8 9
6 5 4
1 2
A B C D E F
3
G H I J K L M N O
ENT
ARM
PQR S T U V WXYZ
CLR 0
EverA ccess
RX TX CARD PO WER
RS485
RS485
SYS
7
8 9
6 5 4
1 2
A B C D E F
3
G H I J K L M N O
PQR S T U V WXYZ
CLR 0 0 CLR
WXYZ T U V PQR S
M N O J K L G H I
3
D E F A B C
2 1
4 5 6
9 8
7
SYS ENT
ARM
EverAccess EverAccess
ARM
ENT