Appendix
Publication 177510.1 - March 1996
Troubleshooting and
Specifications
If you don’t see the power-supply module indicators lit as specified
on page 3-2, use the following table to troubleshoot the problem.
Indicator:
Normal Operation:
If Not Lit:
AC ON
red
no ac power is being supplied to the unit
AC OK
green
an insufficient amount of ac power is being
supplied to the unit
DC OK
green
the supply's internal dc voltages are not in their
proper operating range
If the AC ON indicator is lit and either the AC OK or DC OK
indicators are not lit, you must shut down ac power (or toggle the
remote on/off for the PLC-3/10 chassis or lift and return the module
interlock bar on the PLC-3 chassis) to reset the supply. If this does
not clear the situation, you must troubleshoot the chassis using the
PLC-3 Family Controllers Installation and Operation Manual,
publication number 1775-6.7.1.
Specifications for PLC-3 processors follow.
PLC3 System
I/O Capacity
G
4096 inputs and 4096 outputs maximum
Memory Capacity
G
1.92M words maximum
G
16 bits per word
Data Table Size
G
Expandable (limited only by available
memory)
Scan Time (nominal)
G
1 ms per 1K words of relaytype
instructions
G
2.5ms per 1K words (typical)
1775P1 Power Supply
Input Voltage
G
120V AC: 97 to 132V AC
G
220/240V AC: 194 to 264 V AC
Memory Type
G
Error Detecting and Correcting (EDC)
Alternate Language Modules
G
1775S4B scanner module
G
1775GA module
Environmental Conditions
G
Operational Temperature:
0 to 60
°
C (32 to 140
°
F)
G
Storage Temperature:
40 to 85
°
C (40 to 185
°
F)
G
Relative Humidity: 5 to 95%
(without condensation)
Powersupply Module
Indicators
Specifications
