Gantner IDL 101 - 5 Signal Processing; Internal Reference Voltage

IDL 101
SIGNAL PROCESSING
34 HB_IDL101_E_V222.doc
Gantner Instruments Test & Measurement GmbH
22 k
VP
VP
Figure 5.2 Internal pull-up resistor at the digital I/Os
5.3. Internal Reference Voltage
An internal reference voltage serves to adjust the entire analog signal processing automatically.
5.4. Internal Processing
Figure 5.3 Block diagram Datalogger IDL 101
B
AIn + AIn + AIn + AIn + AIn + AIn +
A
SOURCE SOURCE SOURCE SOURCE SOURCE SOURCE
RS 485
Interface
A/D
Converter RUN-LED
ERROR-LED
RTC
(Buffered)
RAM
(Buffered)
FLASH
EEPROM
Volt age
Regulator
RS 232
Interface
Analog
Multiplexer
D/A
Converter
Main Proc.
(µP)
Digital I/O
+10..30 V
AIn - AIn - AIn - AIn - AIn - AIn - AIn -
I/O 07 I/O 06 I/O 05 I/O 04 I/O 03 I/O 02 I/O 01 I/O 08 I/O 09 I/O 10 I/O 11 I/O 12 I/O 13 I/O 14 I/O 15 I/O 16
0 V RX TX COM
A
GND
A
GND
A
GND
A
GND
A
GND
A
GND
A
GND
Optic
Interface
RS 485
Digital
=
=
=
Analog
RS 232
FLASH
EPROM
SRAM