CHD200G series Fingerprint Reader
5
When have alarm (door switch, infrared) audion power on, relay action.
Remark: OC door alarm output, need addition a outer relay and a DC12V power supply.
3.3.3 RS485 connections
Attentions:
1. RS485 communication suggests use STP cable had better multi-core
STP;
2. Use a twin-STP cable to be signal cable;
RS485 connection:
1. A, B terminals must be welded well;
2. Must use CAT-5 STP;
For more devices using RS485 to connect:
4. Connection Defines
CAT-5 STP
RS485
Terminals
A
A
System
B
B
120Ohm resistance
B
A
