Instruction manual – AP902 Arc Protection Unit
11 (35
)
A1008B
3.3
P
USH
-
BUTTON DESCRIPTION
AP902 contains one single push-button (SET) that can be used for all operational
functions of the unit. The push-button is utilized for auto-configuration of the system (see
chapter 3.3.1) and for resetting the indicators and latched output relays.
3.3.1
A
UTO CONFIGURATION
(
SYSTEM SETUP
)
When all sensors and binary lines have been connected an auto-configuration procedure
must be executed. The initialization sequence is performed by pressing the “SET”-button
for 2 seconds, and the AP902 sensor LEDs and BI1/BI2 LEDs start blinking. The unit
scans these inputs to see if they are connected and when input is detected the
corresponding LEDs are lit up to mark that a connection was found. The inputs without
connection continue blinking during the remaining 3 seconds. After total time of 5
seconds, all LEDs are turned off. During this system setup the dipswitch setting are also
stored in non-volatile memory.
All sensor inputs will remain operational even when not auto-configured. The auto-
configuration is only used for self-supervision purposes.
Note: in order to redo auto-configuration for a unit containing less connections (binary
inputs/outputs or sensors) than in previous memorized set-up a dip-switch (anyone) must
be moved back and forth prior to performing auto-configuration. Timeout allowing new
configuration is 1 minute. Reconfiguration with more connections is allowed without
moving the dip-switch.
3.4
R
ESET
All LED indications and latched trip relays are reset by pressing the “SET” button for 1
second. Otherwise the latched trip relays will remain activated until auxiliary power is
disconnected. All LED indications will remain active until reset is performed by the
operator even when auxiliary power supply is disconnected (see chapter 3.6 Non-volatile
memory).
Summary of Contents for AP902
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