21
Installation
Connecting to Secure I/O 2
You can connect Secure I/O 2 (I/O device) to BioStation 3 via RS-485. Even if BioStation 3 and Secure I/O 2 are
disconnected, or BioStation 3 is powered off due to external factors, security can be ensured.
•
For an RS-485 cable, use 24 AWG (twisted pair) with a maximum length of 1.2 km.
•
For daisy-chained RS-485, connect a terminating resistor (120 Ω) to both ends of the daisy chain connection.
If you connect the terminating resistor in the middle of the chain, the signal level will decrease, which affects
communication performance, so be sure to connect it to both ends of the daisy chain connection.
1
4
1
2
Exit button
Door lock
Door sensor
PC
Secure I/O 2
RS-485
Hub
BioStation 3
Power
DC power
RS-485 Connection
1 - 485 TRXP
Blue
2 - 485 TRXN
Yellow
3 - 485 GND
Black
4 - SH GND
Grey
Connecting to Power
1 - PWR +VDC Red (white stripe)
2 - PWR GND Black (white stripe)
Cable shielding (optional)
DC power
DC power
•
By connecting a slave device with an RS-485 cable, you can use BioStation 3 as a control system for multiple
doors. The slave device is used as a dummy reader and authentication is performed by the master device.
•
If a fingerprint scanner is configured as a slave device for BioStation 3, another BioStation 3 cannot be added
as a slave device.
•
If the fingerprint scanner is the master device, BioStation 3 cannot be added as a slave device.
•
If BioStation 3 is the master device and BioStation 3 is connected as a slave device, only one BioStation 3 can
be added as a slave device.
•
If BioStation 3 is the master device and BioStation 3 is connected as a slave device, Secure I/O 2 and DM-20
(one of each) can be connected additionally.
•
If BioStation 3 is the master device and BioStation 3 is connected as a slave device, OM-120 cannot be
connected additionally.
•
The maximum number of slave devices that can be connected depends on the authentication method,
number of users, and number of devices. The number of slave devices may affect authentication speed.
•
The master device can control up to thirty-one (31) slave devices. The RS-485 bandwidth allows up to 7
fingerprint scanners to be connected.
•
For more information, please contact Suprema Technical Support Team (
).
