Pepper Computer Modular Computers RS485 - Manual (Page 263)

SMART I/O User’s Manual
©1996 PEP Modular Computers GmbH October 01, 1996 Page 5 - 107
5
Chapter 5 Analog Modules
5.5 SM-DAC1
5.5.1 Introduction
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
† The conversion time applies per channel for a full scale voltage swing of
(-10V .. +10V)
Isolation 1.0 kV Optoisolated from the system
Output
2/6 Outputs
Output Range
±
10V DC (0 .. 20mA)
12-bit DAC with 1-bit non-linearity
11-bit Repeating Accuracy
Glitch-Free Power-On-Reset
2mA (max.) output current (voltage version)
75
µ
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