The WRT is a Wireless data transmission device designed
to receive and transmit RS485 data packets. The product
is factory configured for Modbus RTU protocol. Each data
producing point (slave)can be connectedto oneWRTdevice,
and transmits the data to a second unit, which is connected
to the network master. Several slave data producers can be
connected together, to one WRT. Up to 99 slave units can
transmit to one master, and the units can be configured so
one network master can communicate with another network
through a repeater (see network connection examples)
Description
Installation
Configuration
Power Wiring
Connect external source 4.0 to 6.0 VDC to terminal block,
or use 3.3 to 6.0 VDC produced by AC adaptor, remove
supplied plug and strip wires to terminate onto the radio
block.
Output Wiring
Connect control or monitoring wires to the sensor. Strip
the insulation back approximately 3/8 inch (10mm). If
solid wire, no tool is needed, just insert the wire into
terminal 7 (+) or terminal 8 (-) and the signal ground (6).
Terminals 3,4 and 5 are not used. Wire should be 24-16
AWG, 30 meters maximum. If using stranded wire, use a
small screwdriver to release the terminal securing block
by pressing down on the “x” of the rectangular button,
allowing for wire insertion.
Unit Switch
(RF-CH) Radio
Channel Frequency
0 11 ch 2405 MHz
1 12 ch 2410 MHz
2 13 ch 2415 MHz
3 14 ch 2420 MHz
4 15 ch 2425 MHz
5 16 ch 2430 MHz
6 17 ch 2435 MHz
7 18 ch 2440 MHz
8 19 ch 2445 MHz
9 20 ch 2450 MHz
A 21 ch 2455 MHz
B 22 ch 2460 MHz
C 23 ch 2465 MHz
D 24 ch 2470 MHz
E* 25 ch 2475 MHz
F* 25 ch 2475 MHz
* Note both posi-
tions E and F set channel 25
Each node in a networks will use the same
channel
Node ID: Master is always set to ID
“0”, slave units set to a value between
1 and 99. One transceiver must be
set as the master and at least one as a
slave to the master.
Group ID: Select the same group ID
for all nodes on a network. Contact
factory for other configurations.
Use 5VDC external power supply, and bond the Modbus equipment
ground to the same ground as power supply. If using anAC wall-type
adaptor, removesupplied cord endand strip thecord wires fortermina-
tion on radio block. Set this switch to “TERM” position.
The WRT unit must be installed indoors or outdoors in
a suitable non-metallic enclosure. Each unit requires a 5
VDC power supply, and will need to be configured for
network address, channel frequency and group ID. The
radio can be screwed to a back panel or hung on a wall
with a nail or screw.
Back side of WRT
When installing one zone, set the node (radio) address to
the same value as the data input device. The factory must
configure the master for 2, 4, 7 and 13 zones. When install-
ing more than one zone, set addresses to correspond with
the following table:
Zone Set Up - no more than 99
Zone
Count Slave ID Data
Node Ad-
dress
1 1-99 Matches
slave ID
21 1-63
2 64-99
41 1-31
2 32-63
3 64-95
4 96-99
71 1-15
2 16-31
3 32-47
4 48-63
5 64-79
6 80-95
7 96-99
13
1 1-7
2 8-15
3 16-23
4 24-31
5 32-39
6 40-47
7 48-55
8 56-63
9 64-71
10 72-79
11 80-87
12 88-95
13 96-99
Press to allow wire
insertion or removal
