B&B Electronics RS-485 User Manual download pdf (Page 3)

485SDD16-1005 Manual 1

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

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

Chapter 1- Introduction

485SDD16 Features

The 485SDD16 is a general purpose control module that

operates through an RS-485 interface. The 485SDD16 offers 16

discrete digital I/O lines. With these features, the module can be

used to sense external ON/OFF conditions and to control a variety

of devices.

Each of the sixteen I/O lines can be defined as either an input or

an output. The digital outputs are CMOS compatible. The digital

inputs are CMOS/TTL compatible. The digital I/O lines are available

through a DB-25S (female) connector.

The 485SDD16 connects to the host computer’s RS-485 or RS-

422 serial port using terminal blocks. The address and turn-around

delay are software programmable to allow for use of multiple

devices or connection to existing multi-node systems. The unit

automatically detects baud rates from 1200 to 9600. A data format

of 8 data bits, 1 stop bit and no parity is used.

Configuration parameters are stored in non-volatile memory.

These parameters consists of module address, communication turn-

around delay, I/O definitions, and output power-up states.

The unit is powered by connecting +12Vdc to terminal blocks or

to the DB-25S I/O connector.

Figure 1.1 - 485SDD16 Module

2 485SDD16-1005 Manual

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

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

Figure 1.2 - Simplified Block Diagram

Packing List

Examine the shipping carton and contents for physical damage.

The following items should be in the shipping carton:

1. 485SDD16 unit

2. Software

3. This instruction manual

If any of these items are damaged or missing contact B&B

Electronics immediately.

485SDD16 Specifications

I/O Lines

Total: 16 (Factory default = inputs)

Inputs

Voltage Range: 0 Vdc to 5 Vdc

Low Voltage: 1.0 Vdc max.

High Voltage: 2.0 Vdc min.

Leakage Current: 1 microamp max.

Outputs

Low Voltage: 0.6 Vdc @ 8.3 milliamps (Sink)

High Voltage: 4.3 Vdc @ -3.1 milliamps (Source)

1 2 3 4 5 6 7 8 ... 27 28

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