Fig 4. Example connection to RS485 2-wire network
3.3.1. GND TERMINAL CONNECTION
Connection of GND terminals of RS485/422 interfaces, devices connected to RS485/422 bus, should be done in the case of a
potential difference of the signals grounds on interfaces RS485 / RS422, which prevents proper data transmission.
Cannot connect to the GND terminal - cables screens, PE circuit of electrical installation, signals grounds of other devices.
3.3.2. LINE TERMINATION
Using Line Termination (terminator) Rt = 120W will reduce electrical reflection in data line at high baud rate. It is not needed below
9600Bd. Should be used Line Termination resistor if the distance is over 1000m @ 9600Bd or 700m @ 19200Bd transmission.
Example connection of Rt (connected to screw terminal block of RS485/422 interface) are shown on Fig. 3 & 4.
3.4. CONNECTION TO 1-WIRE NETWORK
3.4.1. CONNECTION TEMPERATURE SENSORS
Connections of 1-wire temperature sensors to ADA-401WP module are shown below.
Fig 5. Sensor connection to ADA-401WP module with (3-wire) 1-WIRE network
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