Instruction manual – AP901 Arc Protection Unit
11 (39
)
A1017B
3.3
P
USH
-
BUTTON DESCRIPTION
AP901 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 AP901 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).
