Rs-485 communication – Wavetronix Click 400 (900 MHz radio) (CLK-400) - User Guide User Manual
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CHAPTER 3 • WIRING THE DEVICES
Figure 3.1 – Removing and Wiring Screw Terminal Blocks
RS-485 Communication
Another feature that is common to many Click devices is RS-485 communication capabili-
ties. RS-485 is important for Click devices because it is carried on the T-bus to all the Click
devices on a given DIN rail.
Connecting RS-485 communications to the Click devices on a DIN rail can be accom-
plished in two different ways: through a 5-screw terminal on the end of a T-bus, or through
a Click module, which will then communicate with the T-bus.
Note
The steps in this section are specifically for use with a Wavetronix SmartSensor ca-
ble. If you are using a different cable or wiring system, the colors of the wires used
will be different.
To connect through a 5-screw terminal, follow these steps.
1 Connect the +485 (white) wire from the terminal block or cable to the middle screw
terminal on the 5-screw terminal block connector you’re using for the T-bus in question
(see Figure 2.2 in the previous chapter for the pinout of the 5-screw terminal block).
2 Connect the -485 (blue) wire from the terminal block or cable to the middle screw
terminal on the 5-screw terminal block.
3 Plug the 5-screw terminal block into the T-bus.
To connect through any Click device with RS-485 ports, follow these steps:
1 Ensure that the Click device is mounted on a T-bus connector.
2 Connect the +485 (white) wire from the terminal block or cable to the terminal marked
“+485” in the screw terminal blocks (see Figure 3.2).
3 Connect the -485 (blue) wire from the terminal block or cable to the terminal marked
“-485” in the screw terminal blocks.
4 Connect the RS-485 drain wire from the terminal block or cable to a GND terminal in
the screw terminal blocks.
- Click 421 (bluetooth to serial converter) (CLK-421) - User Guide Click 342 (lean managed ethernet switch) (CLK-342) - User Guide Click 341 (lean managed ethernet switch) (CLK-341) - User Guide Click 340 (lean managed ethernet switch) (CLK-340) - User Guide Click 331 (unmanaged ethernet switch) (CLK-331) - User Guide Click 330 (unmanaged ethernet switch) (CLK-330) - User Guide Click 304 (RS-232 to RS-485 converter) (CLK-304) - User Guide Click 305 (RS-232 to RS-485 converter) (CLK-305) - User Guide Click 301 (serial to ethernet converter) (CLK-301) - User Guide Click 100 (16 output contact closure) (CLK-100) - User Guide Click 104 (4-channel DIN rail contact closure) (CLK-104) - User Guide Click 110 (4-channel contact closure eurocard) (CLK-110) - User Guide Click 112 (detector rack card) (CLK-112) - User Guide Click 114 (detector rack card) (CLK-114) - User Guide Click 120 (screw terminal relay) (CLK-120) - User Guide Click 121 (spring cage relay) (CLK-121) - User Guide Click 200 (surge suppression) (CLK-200) - User Guide Click 201 (1 amp AC to DC converter) (CLK-201) - User Guide Click 202 (2 amp AC to DC converter) (CLK-202) - User Guide Click 203 (UPS and battery) (CLK-203) - User Guide Click 204 (4 amp AC to DC converter) (CLK-204) - User Guide Click 210 (AC circuit breaker) (CLK-210) - User Guide Click 211 (AC outlet) (CLK-211) - User Guide Click 221 (DC surge protector) (CLK-221) - User Guide Click 222 (system surge protector) (CLK-222) - User Guide Click 223 (dual-485 surge protector) (CLK-223) - User Guide Click 230 (AC surge protector) (CLK-230) - User Guide Click 250 (wireless surge protector) (CLK-250) - User Guide