B&B Electronics RS-485 User Manual download pdf (Page 6)

485SDD16-1005 Manual 7

B&B Electronics -- 707 Dayton Road -- Ottawa, IL 61350

PH (815) 433-5100 -- FAX (815) 433-5104

Figure 2.1 - Example of Multi-Node Network

485SDD16 485SDD16485SDD16

Figure 2.2 - RS-485 2-wire Connection

8 485SDD16-1005 Manual

B&B Electronics -- 707 Dayton Road -- Ottawa, IL 61350

PH (815) 433-5100 -- FAX (815) 433-5104

Figure 2.3 - RS-422 4-wire Connection

Power Supply Connections

Power to the 485SDD16 must be supplied by an external power

supply connected to the +12Vdc and GND terminal blocks or to the

I/O connector. An external power supply must be able to supply 8 to

16 Vdc at 35ma.

NOTE: Power requirements of the module does not include the

power consumption of any external devices connected to the

module. Therefore, any current that is sourced by the digital outputs

must be added to this value and the current must not exceed the

maximum output source current. Refer to the 485SDD16

Specification Section of Chapter 1.

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B&B Electronics RS-485 User Manual Page 6