Pepper Computer RS232, RS485 user manual SM-ADC1, Introduction

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

5.4SM-ADC1

5.4.1Introduction

The SM-ADC1 provides a fast, 12-bit, bipolar (± 10V DC), 6-channel analog to digital 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-ADC1 for current input (0 .. 20mA) is also available.

5.4.2 Specifications

Isolation	1.0 kV Optoisolated from the system
	6 Differential Inputs
	Input Range ± 10V (0 .. 20mA)
	12-bit ADC with 1-bit non-linearity
	10-bit Repeating Accuracy
Input	Overvoltage Protection ± 35V
	Input Impedance approx. 440kΩ (124Ω )
	10kHz Filter
	On-Chip Ref. Voltage
	13∝s Conversion Time @ 1MHz SCLK †
EEPROM	256 Byte serial EEPROM for Calibration Data
Front Panel	2 Red LEDs (User Configurable)
Power Cons.	350mW (min.), 450mW (max.)
Temperature Range	Standard (0°C to +70°C), Ext./Storage (-40°C to +85°C)
Module Weight	70g
ID Byte	$62, read by the SPI Interface

† The conversion time applies per channel

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October 01, 1996 ©1996 PEP Modular Computers GmbH Page 5 - 89