Maintenance/Troubleshooting - Configuration module problems
Intelli-FLEX II product guide • • • a - 15
Operation on distributed low voltage DC
If the system is powered by distributed low voltage (24 or 48 VDC) a backup
battery should not be connected at the processor.
The converter used on the Intelli-FLEX II processor will operate over an input
range of 18 to 56 VDC. If the input voltage is in this range and you measure less
than 11 volts at TP2 (VDD), check to make sure the total load on the processor is
less than 250 mA. (Remove other loads that may be attached to the processor and
drawing power, including the Configuration module.) If the total load is less than
250 mA, and the voltage is less than 11V the processor is probably bad.
Configuration module problems
The Configuration module that attaches to the Intelli-FLEX II processor is a device
that receives data from the processor then lights the appropriate LEDs and
displays the appropriate message on the LCD. The switch information is encoded
by the Configuration module and read by the processor. Problems that might
occur with the Configuration module can be classified as follows:
Indications
The following indicate a possible problem with the Configuration module.
•
Malfunctioning display segment or LED.
•
Erratic display output during update.
•
Improper or erratic response (or no response) to switch operation.
Almost all instances of improper Configuration
module operation are caused by a poor
connection to the processor.
Conditions
If you are experiencing problems with the Configuration module, check the
following:
1. Be sure that the cable between the processor and the Configuration module
is in good repair, and is the correct pin configuration (Pin 1 to Pin 1).