L 1 P o l a r i t y < N o r m . >
L 2 P o l a r i t y < N o r m . >
S a f e V d c < 1 2 0 V >
C l r A l a r m M o d e < M >
C l e a r A l a r m
7. Set the following:
L1/L2 Polarity
: The lines polarity - Normal (default) or Reverse
Normal – safety will be activated when L1/L2 has 5V
Reverse – Safety will be activated when L1/L2 is connected to ground or not
connected.
Safe Vdc
: Threshold value for safe Vdc: When the maximum DC voltage (of all
connected devices) reaches this threshold, the PV system will be considered safe
and the display will show Safe DC in the main gateway status screen. You may
set the threshold in the range between 30 -120V (default 120V)
Clr Alarm Mode
: Select the method to return to normal operation as soon as the
emergency stop button is released:
Automatic (default) – when releasing the stop button or relay, the system
immediately returns to normal power production.
Manual – when releasing the stop button or relay, the system will not return to
normal operation unless the user manually clears the alarm by selecting
Clear
Alarm
(below). Use this option if the button does not have the locking feature,
the relay in the control system may open unexpectedly, or if the user requires
this added step.
Clear Alarm
: Used to allow normal operation. Appears only if the Clr Alarm
Mode parameter (above) is set to Manual, and the installation is in remote safety
shutdown
Firefighter Gateway Installation Guide MAN-01-00113-1.4
53
Connecting and Configuring an Emergency Stop Button to the Gateway