Pepper Computer RS485 User Manual

SMART I/O User’s Manual

©1996 PEP Modular Computers GmbH

October 01, 1996

Page 5 - 89

Chapter 5  Analog Modules

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.

† The conversion time applies per channel

Isolation

1.0 kV Optoisolated from the system

Input

6 Differential Inputs
Input Range 

±

 10V (0 .. 20mA)

12-bit ADC with 1-bit non-linearity
10-bit Repeating Accuracy
Overvoltage Protection 

±

 35V

Input Impedance approx. 440k

Ω

 (124

Ω

 )

10kHz Filter
On-Chip Ref. Voltage
13

µ

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