Pepper Computer RS232, RS485 user manual SM-DOUT1, Off

Chapter 4 Digital Modules SMART I/O User’s Manual

4.2SM-DOUT1

4.2.1Introduction

The SM-DOUT1 provides eight optoisolated 24V DC (typ.) digital outputs arranged in 2 independent groups. The maximum output switching fre- quency is limited to 1 kHz (square wave) with the output in the ON state when the system issues a logical ‘0’. The maximum continuous output supply current is limited to 500mA (resistive loads) and provision has been made to cater for inductive loads. The user interface is realized by 8 yellow LEDs (1 per output channel) which illuminate when the output is ON.

4.2.2 Specifications

Isolation	2.5 kV optoisolated from the system
	8 Digital Channels
	2 Independent Groups
	High-Side Switch (Common Vcc)
	500mA Continuous Current (per
	channel)
	Inductive Load Protection (clamp
Output	diode)
	Power ON/OFF Protection	: 90V/10∝s (35V)
	Overvoltage Protection
	Output Voltage	: 24V DC
	Switch ON Delay (resistive)	: 3∝s (at 24V)
	Switch OFF Delay (resistive)	: 130∝s (at 24V)
	Max. Frequency	: 1 kHz square
		wave
	Output ON	: Intern. Logical '0'
	Output OFF	: Intern. Logical '1'
	Outputs after Reset	: OFF
Front Panel	Yellow LEDs ON when the output is ON
Power Consumption	5mW (min.), 270mW (max.)
Temperature Range	Standard (0°C to +70°C), Extended (-40°C to +85°C)
Module Weight	70g
ID Byte	$10, read by the SPI Interface

March 12, 1996 ©1996 PEP Modular Computers GmbH Page 4 - 19

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