Autani ZRB series Manuel de l'utilisateur - Page 7

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Theory of Operation

The ZRB was designed to be powered from the same voltage that a thermostat or doorbell

system operate from, 24 VAC. However, the ZRB is flexible enough to be powered from other

power sources as well. Refer to the Specifications section for more detailed power

requirements.

The serial communications port on the ZRB is capable of full-duplex and half-duplex operations,

depending on firmware loaded into the ZRB. The ZRB can interface with a host of RS485

based protocols such as LonWorks, BACnet, Modbus and other proprietary protocols based on

the firmware image programmed into the device. Commands and data can originate from either

the wired or wireless sides of the ZRB. When operating as a full-duplex device the Rx and Tx

pairs are connected to the corresponding pair on the communicating device. When operating in

half-duplex mode the positive pair and negative pair are attached together to the corresponding

connection on the communicating device.

The ZRB uses ZigBee in the 2.4 GHz ISM band to communicate wirelessly. There are two

LEDs on the bottom of the ZRB which indicate network status and unit status. The pushbutton

is used to leave and join ZigBee networks. When joined to a ZigBee network with an Energy

Manager the ZRB becomes one part of a multifaceted system designed to eliminate wasted

energy and increase operating efficiency. When paired with another ZRB to replace a wire the

communications channel requires no special personnel for installation thereby saving money

and time.

Full-Duplex

ZRB

Tx+

Tx-

Rx-

Rx+

GND

The information contained in this document is proprietary and confidential information of Autani Corporation. Any use of this

information without the expressed written consent of Autani Corporation is prohibited.

ZigBee to RS485 Bridge (ZRB)

Users Manual

Device

Rx+

Rx-

Tx-

Tx+

GND

CONFIDENTIAL AND PROPRIETARY

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6. Theory of Operation

Half-Duplex

ZRB

Device

Tx+

Tx-

D+

Rx-

D-

Rx+

GND