889-2106-03
Model U-1400 Operations Manual Rev Apr 2020 Page
36
of 39
Section 6
Block Diagram
Micro Controller
Loop
Isolation
Loop
Oscillator
Loop
Capacitors
Non-volatile
Memory
Loop
Isolation
Loop
Oscillator
Loop
Isolation
Loop
Oscillator
Loop
Isolation
Loop
Oscillator
Squaring Circuit
DETECT
LEDs
Vital Input 1
LCD
Vital Input 2
Vital Input 3
Vital Input 4
+9 to
+18 VDC
Power
Supply
DC Com
Vs
+12 VDC
GND
Front Panel
Pushbutton
Switches
32 MHz
Oscillator
Primary
Vital
Outputs
Audible
Buzzer
Loop
Capacitors
Loop
Capacitors
Loop
Capacitors
Auxiliary
Vital
Outputs
RS-232
Communication
Input
RS-232
Communication
Output
Check
Loop 1
Inputs
Check
Loop
Activation
Relay
Check
Loop
Activation
Relay
Check
Loop
Activation
Relay
Check
Loop
Activation
Relay
+10 VDC
+5 VDC
Synch In
Synch Out
Loop 1
Inputs
Check
Loop 2
Inputs
Loop 2
Inputs
Check
Loop 3
Inputs
Loop 3
Inputs
Check
Loop 4
Inputs
Loop 4
Inputs
Internal
EEPROM
External
EEPROM
