A-17
24 Point I/O Point Types
USWITCH
2-position switch, unsupervised. Used for a 2-position switch without an EOL or current
limited resistor.
OSWITCH
2-position switch, supervised for opens. Requires an EOL resistor.
SSWITCH
2-position switch, supervised for opens and shorts. Requires EOL and current limited
resistors.
TSWITCH
3-position (SPDT) switch, supervised for opens. Requires EOL and series current limiting
resistors (up leg).
Circuit Status
LCD Display
System Status
Normal
OFF
Limited
2-Position Switch
Invalid State TBL
Open
2-Position Switch
ON
Disable TBL
2-Position Switch
Disable TBL
Circuit Status
LCD Display
System Status
Normal
OFF
Limited
2-Position Switch
Invalid State TBL
Open
2-Position Switch
Open Ckt TBL
Short
2-Position Switch
ON
Disable TBL
2-Position Switch
Disable TBL
Circuit Status
LCD Display
System Status
Normal
OFF
Limited
2-Position Switch
ON
Open
2-Position Switch
Open Ckt TBL
Short
2-Position Switch
Short Ckt TBL
Disable TBL
2-Position Switch
Disable TBL
Circuit Status
LCD Display
System Status
Normal
CENTER
Limited
3-Position Switch
UP
Open
3-Position Switch
Open Ckt TBL
Short
3-Position Switch
DOWN
Disable TBL
3-Position Switch
Disable TBL