4
IM 04L51B11-01EN
GX20W Overview
The GX20W is a paperless recorder equipped with a
gateway function for the ISA100 field wireless network.
It can (1) display in real time on its touch screen
measurement data from compatible field wireless
devices, such as the YTMX580 Multi-input Temperature
Transmitter, and I/O modules installed in the GX20W and
(2) save the data in an SD card.
Up to 50 field wireless devices can be connected.
Up to 500 channels (I/O channels) can be measured.
The wireless gateway function receives Publish
1
data
from field wireless devices and stores it in the Modbus
registers.
The wireless gateway function is connected internally to
the Ethernet interface. The Modbus client function can be
used to assign Modbus register data to communication
channels (C001 to C500) and record and display process
data.
1 Action to measure the process value at intervals preset
in the field wireless device itself and transmit it via
wireless communication.
GX20W
field wireless devices
Specifications
The following specifications differ from those of the GX20.
Functional specifications
• Wireless communication (GX20W only)
Communication protocol: ISA100 Wireless
(IEEE802.15.4)
Frequency: 2400 - 2483.5 MHz license free ISM band
RF Transmitter power: Max. 11.6 dBm (fixed)
Reception sensitivity: -95 dBm or less
Data rate: 250 kbps
Antenna: +2 dBi Omni directional type
Radio security: AES 128 bit codified
Communication range: 500 m outdoors, line of site A
value under ideal line-of-site conditions.
The value varies (decreases) greatly depending on the
environmental conditions at the installation location.
Number of field wireless device connections: Up to 50
• Communication channel function (standard)
Numebr of Communication channels: 500 (C001 to
C500)
The Modbus client function is used to read the Modbus
registers and assign them to communication channels.
• System information disply
In the version information display, “BXXXXXXXX”
appears after the version.
Never update the firmware. The GX20W
firmware is not available on the website
for downloading.
Be careful not to update using GX20
firmware.
• Expandable I/O connection
The expansion module (GX90EX) and the expandable
I/O (GX60) cannot be connected to the GX20W.
Hardware specification
• Wireless antenna
Antenna connector type: N type jack
Matched antenna impedance: 50 Ω
• Power Supply
• Rated supply voltage: 100 to 240 VAC
• Allowable power supply voltage range: 90 to 132,
180 to 264 VAC
• Rated power supply frequency: 50/60 Hz
• Power consumption:
Supply
voltage
LCD backlight
off
Normal
operation
Maximum
100 V AC
38 VA
47 VA
90 VA
240 V AC
50 VA
59 VA
110 VA
* The following combinations are assumed for LCD
backlight off and normal operation.
5 AI modules, 4 DO modules, 1 DI module
• Module power supply voltage: The total allowable power
consumption of respective modules is up to 20 W.
• Allowable interruption time: Less than 1 cycle of the
power supply frequency.