User Guide

2
R20A
Admin Guide
1.2. Connector Introduction
Ethernet(POE): Ethernet (POE) connector which can provide both
power and network connection.
12V/GND: External power supply terminal if POE connector is not
available.
RS485-A/B: RS485 terminal.
DOORA/B: Trigger signal input terminal.
RelayA/B (NO/COM/NC):Relay control terminal.
Note: The general door phone interface diagram is only for
reference.
Figure 1.2-1 Connector Interface
Figure 1.2-2General interface