Cybrotech WM-1 User manual

WM-1
Wireless modbus-to-modbus bridge
Features
Examples
• replacement for RS485 wiring
• modbus RTU serial protocol
• wired/wireless combinations
• very long range, no hopping
• protected private connection
• multiple slaves per device
• multiple addressable groups Modbus
master
868
MHz
RS485 RS485
300m Modbus
slave
Modbus master, connected to 12 slaves
using a pair of WM-1 devices.
Modbus master, connected to 10 slaves,
organized in two groups.
Modbus master, connected to 5 slaves,
each one has has a local WM-1 device.
WM-1
Modbus wireless bridge
230V 1W 868MHz RS485 IP20 50°C
230V
power
supply
RS485
A
B
C
RF
power supply
Tx
Rx
push buttonconfiguration
jumpers
(below the cover)
whip antenna

Radio configuration
• turn on all devices at the same time
• within 10 seconds, while RF led is blinking,
press and hold button on one of the devices
After a second, the new address is randomly
generated and sent to all devices. RF led will
blink 3 times, to confirm the new address.
Create a new secure group
• turn on new device
• within 10 seconds, press and hold button on one
of the existing devices
After a second, the existing group address is sent
to the new device. RF led will blink 3 times, to
confirm the address is sent.
Add new device to the group
• hold the button and turn device on
RF led will blink twice. Group address is now
reset to default. Other devices are not affected.
Default jumper position is 2400, 8n1, normal.
Change is applied right away, no reset needed.
Factory reset
• press the button
RF LED will blink shortly on each connected device.
Serial interface is not affected.
shortly
Connection check
button
button
new device
RF led
button
RF led
button
power on
<10s >1s
RF led
RF led (new)
button
power on
<10s >1s
RF led
button
power on reset
Serial configuration
normal
extended
JP5
timeoutbits&parity
8n1
7e1
8e1
8n2
JP3 JP4
2400
9600
19200
38400
baudrate
JP1 JP2
2400
9600
19200
38400
normal
timeout
25ms
10ms
5ms
5ms
100ms
100ms
extended
200ms
100ms

Technical specifications
Serial
Radio
General
Baudrate
Data bits & parity
Message size
Galvanic isolation
Termination resistor
Frequency band
Subband
Modulation
Listen before talk
Group address
Connection time
Message delay
Output power
Operating range
Power supply
Terminals
Operating conditions
Storage temperature
Dimensions
Weight
Degree of protection
Standards
2400, 9600, 19200, 38400
8n1, 7e1, 8e1, 8n2
64 bytes max
4kV RS485 to mains (SELV)
240 Ohm internal, always on
ISM 868MHz (EU)
L 866.8MHz, 1% utilization
FSK, 160kHz bandwidth
yes, delay limited to 20ms
32-bit, automatically generated
10s power-on to network ready
5..20ms, depending on size
25mW
300m with optical visibility
230V, 50..60Hz, 1W
0.25..1.5mm2
-20..+50°C, 0..85% rh nc
-40..+85°C
93x45x27mm, 86mm antenna
90g
IP20
EN 60730-1, EN 300 220-2,
EN 301 489-1, EN 301 489-3
Mounting
Modbus wireless bridge 230V 1W 868MHz RS485 IP20 50°C WM-1
45
33
81
ø3
ø3
93
Device should not be installed inside
the metal cabinet. Distance from
antenna to the nearest object should
be at least 10cm.
Device is designed for Modbus RTU, but it can be
used with any other serial protocol, as long as
messages are sent one at a time (half duplex).
A A AB B BC C C
Wiring
Frequency subband
25mW 25mW 10mW 500mW 5mW
1% 0.1% 1% 10% 100%
865.0-868.6 868.7-869.2 869.3-869.4 869.4-869.6 869.7-870.0
Device uses L subband, which allows
1% utilization and 25mW output power
Secure group
By default, all devices are in the same group, they listen to each
other. To separate your devices, for each modbus master create a
new secure group. Once the group is created, no other device can
listen or interfere with your data.
Groups share the same bandwidth. To avoid collisions, keep the
traffic low or synchronize masters so that messages don't overlap.