24V
AC/DC A+ B-
GND
The W-Modbus units have 24 VAC/VDC power in/out connection and con-
nection for Modbus RTU communication via RS485.
WARNING: When powering the W-Modbus device using 24 VAC, the
power supply/transformer should not be shared with another Modbus de-
vice also sharing a RS485 connection. This is to avoid ground loops caused
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Install the W-Modbus unit next to the device it should be connected to.
APPLICATION AREA
The W-Modbus product transmits Modbus RTU frames wirelessly. It is de-
signed to be used indoors as a Modbus RTU cable replacement.
GENERAL
All relevant personnel must acquaint themselves with these instructions
before installation. Warranty is subject to void if the product is not hand-
led accordingly with the outlined instructions. Any damage to the product
or parts due to improper handling will void the warranty.
WARRANTY
The warranty or service agreement will be deemed void if:
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(2) The serial number on the product has been made ineligible or is missing.
THE PACKAGING CONTAINS
1 x W-Modbus or 1x W-Modbus PRO
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TECHNICAL DATA
Power supply: 24 VAC ±15% 50-60 Hz, 24 VDC ±15%
Max. power consumption: 2.5 W
24 V output max. power: 10 W
Auto resettable fuse: Yes
Cable rating, connector: solid / stranded 0.14 - 0.5 mm2/ 0.2 - 0.5
mm2
Conductor sizes (AWG): 24 – 20
Frequency band: 2.45 GHz, ISM band (2400-2483 MHz)
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Number of Nodes: 100 Nodes in one wireless network
Number of hops: Max 8 hops in the meshing network
Range per hop: 500 m line of sight (approximately 50-
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IP class: 40
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Ambient temperature: Operating: -20 to +55°C
Storage: -30 to +80°C
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Dimensions: W86.0 x H86.0 x D25.5 mm
A W-Modbus network consists of a single W-Modbus Gateway connected
to the Modbus Client using an RS485 cable, and up to 100 W-Modbus No-
des, each of them connected to one Modbus Server over RS485. Every
device can act as either a Gateway or a Node, selectable by the 3 pole
switch - see Commissioning section.
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Modbus address. The scanning is done by querying each Modbus address,
hence the process may take up to 2 minutes. If the W-Modbus Node cannot
W-Modbus Node
Modbus RTU cable
Wireless Mesh
W-Modbus PRO Node
W-Modbus Gateway
Client
Server
Server
Server
Server
Server
Server Server Server Server
Server
MANUAL W-Modbus and W-Modbus PRO
FCC ID: XRSTIMOMWAN201
IC: 8879A-TIMOMWAN201
ELECTRICAL SAFETY
1PN[SWCNKƂGFGNGEVTKEKCPUOC[ perform interventions in connection with
electrical installation. Always fol-low local/national rules when performing
this type of electrical installation. When connecting a 24 V isolation
transformer, this must be done in accor-dance with IEC 61558-1.
POWER AND RS485 CONNECTIONINSTALLATION
SYSTEM OVERVIEW
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Modbus Client connected to the W-Modbus Gateway.
If adding, removing or changing the Modbus address of the connected de-
vice, double press the push button to initiate a new scanning.
W-Modbus is an end device with internal termination resistor.
With the PRO version of W-Modbus, up to four Modbus Servers can be
connected to one W-Modbus PRO Node - making it even easier to con-
nect multiple devices located in close proximity to each other.
W-Modbus and W-Modbus PRO are fully compatible and can be mixed
in a system. All instructions below apply to both models.
W-MODBUS PRO
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box. Start with mounting the backplate of the enclosure.
3. Connect the power supply and the Modbus device to the W-Modbus
unit, as shown to the right. Use the rear and/or top knockouts for
cable entry.
4. All W-Modbus units are factory set for Node operation, without the
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system, adjust the dip switches accordingly.
5. Secure the front plate to the mounted back plate.
6. Check that the W-Modbus unit and its wiring are securely mounted (if
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The device is now ready for commissioning.
The label on the back of the product shows the product type:
W-Modbus or W-Modbus PRO.
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