Messoa NCB855E User Manual page 8

1. Overview
Pin Signal
1 RS485+
2 RS485-
3 GND
4 ALM-Out
5 ALM-IN 1
6 ALM-IN 2
9. Connects to the LAN port of a standard 10BaseT/100BaseTX device, e.g., hub,
Ethernet/PoE:
switch or router. The LED indicators show the status as below:
Color Status
Green On
Off
Orange Blinking
On
Off
8 NCB855E/NCB855PRO
Connection
Reserved.
Reserved.
Ground (electricity) in electrical circuits.
Connects to alarm device that responds to
alarm signals, such as buzzers or LED lights.
Besides, an external relay is also employed
as a switch accompanying the buzzer or LED
light. Therefore, a diode is recommended being
connected in parallel with the relay to protect
against transient voltages that may damage the
component inside the camera. Note that the
supplied voltage and current for the relay must
not exceed DC 30V and 1A.
Connects to device that triggers alarm signals
which range between DC +3.3 and 6 Volts for
High level activation, and under +1 Volt for Low
level activation.
Connects to device that triggers alarm signals
which range between DC +3.3 and 6 Volts for
High level activation, and under +1 Volt for Low
level activation.
Indication
Network connection is established.
No network connection.
Networking is active
Collision occurs
Networking is inactive
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