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Users Manual
ZigBee to RS485 Bridge (ZRB2)
1000141
Document Number: 80071
7125 Columbia Gateway Drive, Suite 200
Columbia, MD 21046
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.
CONFIDENTIAL AND PROPRIETARY
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ZigBee to RS485 Bridge (ZRB2)
Version Date Changed By Revision Description
1 1-11-2011 MEP Preliminary
Users Manual
1. Description
Table of Contents
1. Description ............................................................................................................... 3
2. Ordering Information ............................................................................................... 4
3. Specifications ........................................................................................................... 4
3.1 Absolute Maximum Ratings ........................................................................................................... 4
Recommended Operating Conditions ........................................................................................... 4
3.2
DC Electrical Specifications .......................................................................................................... 5
3.3
RF Electrical Characteristics ......................................................................................................... 5
3.4
4. Physical Interface .................................................................................................... 5
5.
Certifications ............................................................................................................ 6
5.1 FCC – United State ....................................................................................................................... 6
IC – Canada .................................................................................................................................. 6
5.2
6. Theory of Operation ................................................................................................. 7
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.
CONFIDENTIAL AND PROPRIETARY
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ZigBee to RS485 Bridge (ZRB2)
Users Manual
1. Description
1. Description
The ZigBee to RS485 Bridge (ZRB2) provides a cost-effective path to wirelessly enable many
devices which still use wired commutations channels. The wireless side of the ZRB2 employs
an RF transceiver in the 2.4 GHz ISM band based on the ZigBee IEEE 802.15.4 wireless
network protocol. The wired side of the ZRB2 communicates in RS485 full or half duplex
differential modes (i.e. RS485 or RS422).
Features
• FCC (V8NZRB1000141) and IC (7737A-ZRB1000141) certified
• Operational Range: ~1000 feet (LOS)
CONFIDENTIAL AND PROPRIETARY
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.
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ZigBee to RS485 Bridge (ZRB2)
Part Number
Description
1000141-01
ZRB2, Aprilaire 8870 Thermostat Interface Module
1000141-02
ZRB2, Jackson System’s T-32-P Thermostat Interface Module
1000141-03
ZRB2, Point-to-Point Interface Module
1000141-05
ZRB2, National Meter Interface Module
1000141-06
ZRB2, E50C2 Power Meter Interface Module
1000141-07
ZRB2, Pulse Meter Interface Module
1000141-08
ZRB2, Dent Powerscout Meter Interface Module
1000141-09
ZRB2, Wireless ZigBee Router Interface Module
1000141-10
ZRB2, RS-232 Interface Module
Parameter
Test Condition
Min.
Max.
Unit
Input Voltage (Vdd)
-150
50
V
Voltage on Signal Pin (Rx+, Rx-, Tx+, Tx-)
-9
14
V
Storage Temperature
-25
80
o
C
Parameter
Test Condition
Min.
Max.
Unit
Input Voltage (Vdd)
At 25
o
9 C 40
VDC
Input Voltage (Vdd)
At 25
o
9 C 28
VAC
Operating Temperature
0
60 oC
Users Manual
2. Ordering Information
1000141-04 ZRB2, RS485 Back Bone Interface Module
2. Ordering Information
3. Specifications
3.1 Absolute Maximum Ratings
Note: Exceeding the maximum ratings may cause permanent damage to the unit
3.2 Recommended Operating Conditions
Note: Operating conditions outside those listed here may cause inappropriate and
unpredictable behavior.
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.
CONFIDENTIAL AND PROPRIETARY
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ZigBee to RS485 Bridge (ZRB2)
Parameter
Test Condition
Typ.
Max.
Unit
Input Current (Idd)
15
60
mA
Parameter
Test Condition
Min.
Typ.
Max.
Unit
Frequency Range
At 25
o
2400 C
2500
MHz
Maximum Input Signal Strength
0
dBm
Relative Frequency Error
-120
120
ppm
EM250 Tx Power (CH11-CH25)
-11
dBm
EM250 Tx Power (CH26)
-20
dBm
Number
Name
1
No wire present
-
Reserved for future feature expansion
2
Red
PWR
Input power of the ZRB2
3
Blue
Rx+
Positive half of the Receiver differential pair
4
White
Rx-
Negative half of the Receiver differential pair
5
Yellow
Tx-
Negative half of the Transmitter differential pair
6
Green
Tx+
Positive half of the Transmitter differential pair
7
Black
GND
Input ground and RS485 reference of the ZRB2
8
No wire present
-
Reserved for future feature expansion
Users Manual
3.3 DC Electrical Specifications
4. Physical Interface
Test conditions unless otherwise specified: at 25
o
C, Vdd = 24VDC, No load on RS485 Bus,
LEDs off.
3.4 RF Electrical Characteristics
4. Physical Interface
All signals are from the perspective of the ZRB2.
Wire
Color
Signal
Description
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.
CONFIDENTIAL AND PROPRIETARY
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ZigBee to RS485 Bridge (ZRB2)
Users Manual
5. Certifications
5. Certifications
5.1 FCC – United State
The ZRB2 complies with Part 15 of the Federal Communications Commission rules and
regulations. Any modifications to this device may violate the FCC rules and regulations and
make operation of this device unlawful.
FCC ID: V8NZRB1000141.
NOTE 1: This equipment has been tested and found to comply with the limits for a Class B
digital device, pursuant to part 15 of the FCC Rules. These limits are designed to provide
reasonable protection against harmful interference in a residential installation. This equipment
generates, uses and can radiate radio frequency energy and, if not installed and used in
accordance with the instructions, may cause harmful interference to radio communications.
However, there is no guarantee that interference will not occur in a particular installation. If this
equipment does cause harmful interference to radio or television reception, which can be
determined by turning the equipment off and on, the user is encouraged to try to correct the
interference by one or more of the following measures:
- Reorient or relocate the receiving antenna.
- Increase the separation between the equipment and receiver.
- Connect the equipment into an outlet on a circuit different from that to which the receiver
is connected.
- Consult the dealer or an experienced radio/ TV technician for help.
NOTE 2: This equipment complies with the FCC RF radiation exposure limits set forth for an
uncontrolled environment. This equipment should be installed and/or operated with a minimum
distance of 20 centimeters between the radiator and your body.
NOTE 3: This device complies with part 15 of the FCC Rules. Operation is subject to the
following two conditions: (1) This device may not cause harmful interference, and (2) this device
must accept any interference received, including interference that may cause undesired
operation.
5.2 IC – Canada
The ZRB2 is IC certified.
IC ID: 7737A-ZRB1000141
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.
CONFIDENTIAL AND PROPRIETARY
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ZigBee to RS485 Bridge (ZRB2)
Full-Duplex
Half-Duplex
ZRB
Device
GND
ZRB
Device
Users Manual
6. Theory of Operation
6. Theory of Operation
The ZRB2 was designed to be powered from the same voltage that a thermostat or doorbell
system operates from, 24 VAC. However, the ZRB2 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 ZRB2 is capable of full-duplex and half-duplex
operations, depending on firmware loaded into the ZRB2. The ZRB2 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 ZRB2. 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 ZRB2 uses ZigBee in the 2.4 GHz ISM band to communicate wirelessly. There are two
LEDs on the bottom of the ZRB2 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 ZRB2 becomes one part of a multifaceted system designed to eliminate wasted
energy and increase operating efficiency. When paired with another ZRB2 to replace a wire the
communications channel requires no special personnel for installation thereby saving money
and time.
The information contained in this document is proprietary and confidential information of Autani Corporation. Any use of this
CONFIDENTIAL AND PROPRIETARY
information without the expressed written consent of Autani Corporation is prohibited.
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