PRT-ATH1 / ACC-ATH1
Protege Temperature and Humidity Sensor
Installation Manual | April 2011
9
4.2
Encrypted Module Network
The Protege Temperature and Humidity Sensor incorporates encrypted RS-485 Communications Technology.
Connection of the communications should be performed according to the diagram shown below. It is important
that the N+ Network Communications power be supplied from an independent battery backed power supply unit
or a networked module capable of supplying the required voltage to all of the network powered devices on the
RS-485 Network.
Always connect the Protege Temperature and Humidity Sensor NA and NB terminals to the NA and NB
terminals of the communication network.
MODULE OR CONTROLLER
SUPPLYING POWER TO
NETWORKED DEVICES
N+
N-
NA
NB
N+
N-
NA
NB
N+
N-
NA
NB
AUX+
AUX -
NEXT MODULES
ON NETWORK
ATH1
ATH1
WHITE
BLUE
BLACK
RED
WHITE
BLUE
BLACK
RED
Network and Power Supply Connection
The 12V N+ and N- communication input must be supplied from only ONE point. Connections from
more than one 12V supply may cause failure or damage to the Protege Temperature and Humidity
Sensor or device supplying network power.
Under no circumstances should you power locking devices from the N+ and N- Network
Communication power supply. A separate power supply MUST be used to power locking devices.