EverFocus EBC890, Руководство пользователя

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17 17
17
Fig. 17. Connection to Computer via RS232
Connection to Desktop Reader via RS485
To connect the fingerprint controller to the desktop reader via RS485 bus, terminal 30, 31 and
32 on the main module should be wired to the line 2, 1 and 3 in RJ45 head, as
Fig. 18 shows.
The RJ45 head is provided with the EverAccess desktop reader.
Fig. 18. Connection from Fingerprint Controller to Desktop Reader via RS485
RS485 Bus Based Networking System
Multiple EverAccess controllers can be connected to accommodate larger access control
systems. The controllers are connected via RS485, as shown in
Fig. 19. The desktop reader
(Part#: ERS-871) is a critical component of an RS485 bus based system: it allows simple card
enrollment and acts as the interface between multiple controllers and the PC.
B A GND
POWER CARD TX RX
EverAccess
8
1
1
2
3
30 32
RS485 A RS485 GND
RS485 B
31
RXD
GND
PC DB9
Serial Port
5
3
2
TXD
27 29
RS232 TXD RS232 GND
RS232 RXD
28
Main module