B&B Electronics manual Introduction, 485SDD16 Features, 485SDD16 Specifications

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

485SDD16-1005 Manual	1
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)

2485SDD16-1005 Manual

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

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