Triconex Trident - Page 104

88 Input/Output Modules
Trident Planning and Installation Guide
Model 3401 Digital Output Module Simplified Schematic
ASIC
ASIC
ASIC
Triplicated
I/O Bus
A
A
B
B
C
C
To Other Points
Isolated
Bus
Transceiver
Isolated
Bus
Transceiver
Isolated
Bus
Transceiver
Output
Switch
Drive
Circuitry
Output
Switch
Drive
Circuitry
Output
Switch
Drive
Circuitry
Output
Switch
Drive
Circuitry
A
A
B
C
A or C
B
C
Voltage
Loopback
Detector
+V
Load
Return
A
or
C
I/O Controller(s)
Field Circuitry Typical Point (16)