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Thermalert
®
4.0 Series
Users Manual, Rev. 2.4, Jul 2021
60
7.3 Wiring
7.3.1 Model 6-Wire
Figure 7-2: RS485 Communication for 6-Wire Model
7.3.2 Model 12-Wire
Figure 7-3: RS485 Communication for 12-Wire Model
7.3.3 Computer Interfacing
The USB/RS485 Interface Converter (A-CONV-USB485) allows you to connect your sensor to computers by using
a USB interface.
With auto configuration, the converter can automatically configure RS485 signals without external switch setting.
The converter is equipped with 3000 VDC of isolation and internal surge-protection to protect the host computer
and the converter against high voltage spikes, as well as ground potential difference. When the converter is
connected, the computer gets one virtual COM port.
Note
In serial RS485 communication, the Thermalert 4.0 sensors support the 2-wire / half duplex mode only!
+
V
DC
negative signal RS485-B
positive signal RS485-A
V
DC
+
RS485-B (B)
RS485-A (A)
GND (L)
+VDC (M)
Sensor
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