Pepper Computer RS232, RS485 user manual SM-DAC1, Introduction

Chapter 5 Analog Modules SMART I/O User’s Manual

5.5SM-DAC1

5.5.1Introduction

The SM-DAC1 provides a fast, 12-bit, bipolar (± 10V DC), 2/6-channel digital to analog converter. Two configurable red LEDs on the front panel form the user interface while an on-board EEPROM stores unique calibra- tion data required by the signal converter.

A version of the SM-DAC1 for current output (0 .. 20mA) is also available.

5.5.2 Specifications

Isolation	1.0 kV Optoisolated from the system
	2/6 Outputs
	Output Range ± 10V DC (0 .. 20mA)
	12-bit DAC with 1-bit non-linearity
Output	11-bit Repeating Accuracy
	Glitch-Free Power-On-Reset
	2mA (max.) output current (voltage version)
	75∝s Conversion Time @ 1MHz SCLK †
Ext. Vcc	24V DC (-10% .. +20%)
EEPROM	256 Byte serial EEPROM for Calibration Data
Front Panel	2 Red LEDs (User Configurable)
Power Cons.	660mW (max. voltage version)
	400mW (max. current version)
Temperature Range	Standard (0°C to +70°C), Ext./Storage (-40°C to +85°C)
Module Weight	70g
ID Byte	$40, read by the SPI Interface

†The conversion time applies per channel for a full scale voltage swing of (-10V .. +10V)

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October 01, 1996 ©1996 PEP Modular Computers GmbH Page 5 - 107