Spectrum Controls 1734 User Manual page 13

See the block diagram below:
Isolation
Barrier
I
s
o
CAN
l
Bus Isolated
and a CAN Bus
+5VDC t
i
Controls
o
Point Bus
n
Input-Power
Isolation
Barrier
System_Reset
+24VDC
GND
SPI Interface
Processor
Low
Interrupt
and
CLK
+15VDC ±3VDC
Power Supplies
+3.3VDC ±2%
And
GND
Power Monitor
-15VDC ±3VDC
Chapter 1: Module Overview
Analog_0
Analog_1
Protection,
ADC
Filtering,
Analog_2
Analog
Current Srcs
Switch
SPI Interface
Matrix,
PGA_Interrupt
PGA
LEDs
Controls and Status
System
Clock
Generator
Notes:
1) I/O's are ESD protected
User's Manual Pub. 0300266-02 Rev. B
1-7
Voltage / Current (4-chs)
Thermocouple (3-chs)
RTD / Resistance (2/4-chs)
CJC (1-ch)