Filter
Top Products
Configuration and Use Manual 17
Digital Communications Setup
Installation Using the DisplayDigital Communications SetupBefore You Begin
2. Using twisted-pair shielded cable, and a signal converter if required, connect the remote device
to the RS-485 output terminals on the Series 3000 device. Maximum cable length between the
Series 3000 and remote device is 4000 feet (1200 meters).
• Model 3300 or Model 3500 with screw-type or solder-tail terminals: see Figure 3-1
• Model 3300 or Model 3500 with I/O cables: see Figure 3-2
• Model 3350 or Model 3700: see Figure 3-3
3. Add resistance if required.
4. Configure RS-485 communications as described in Section 13.3.
Figure 3-1 Model 3300 or Model 3500 with RS-485 signal converter – Screw-type or solder-tail connectors
RS-485 to RS-232
signal converter
RS-485 A
RS-485 B
Wire size is 24 AWG (0,25 mm
2
)
For long-distance communication, or if noise from an
external source interferes with the signal, install a 120 Ω,
½ watt resistor at each end of the wiring loop between the
Series 3000 device and the signal converter
Remote
device
Serial port connection
(with 9-pin to 25-pin
adapter if necessary)
Input/output terminal block