EX 200™ System Controls
The EX 200™ monitors and responds to three controls described below. The
ARM/DISARM Switch and HORN SILENCE pushbutton are located on the front panel as
shown in Figure 1. The RESET pushbutton is located on the printed circuit board as
shown in Figure 2.
ARM/DISARM Switch
This is a two-position keyed tubular switch-lock located on the front panel. It can be
connected in series with a remote ARM/DISARM switch connected to terminals 38 and
39. Both must be in the ARM/closed position for the EX 200™ to arm after a 15-second
delay.
When the ARM/DISARM key switch is switched from the DISARM position to the ARM
position and no trouble conditions are present, the system will arm. Upon arming, the
control panel will:
Enable the electro-explosive actuator (EED) firing circuit.
Turn on the ARMED indicator.
Turn off the FAULT indicator.
Energize the trouble relay.
Energize the warning relay.
Energize the arm/disarm output relay. After the relay is energized, the EX 200™
does not process any signals for 100 to 300 ms to allow the system to stabilize.
If the key switch is in the ARM position, moving it to the DISARM position will, after a
delay of two to three seconds (during which the control panel remains armed):
Activate the audible horn intermittently if Switch S3-8 is to the left (see
Programming
section of this manual).
Shunt the electro-explosive actuator (EED) firing circuit.
Turn off the ARMED indicator.
Turn on the FAULT indicator.
De-energize the trouble relay.
De-energize the arm/Disarm output relay.
HORN SILENCE Pushbutton
This is a momentary action pushbutton mounted on the front panel. Pushing the button
when the horn (audible alarm) is sounding will silence the horn. The horn sounds
continuously to signal an alarm and intermittently to signal a trouble or warning.
The horn will immediately sound again if a different trouble, warning or alarm occurs.
During initial power-up, many tests are done in the first 30 seconds. If the horn is
silenced during this time, it may resound as tests are completed.
When the system is disarmed, holding the HORN SILENCE pushbutton depressed for at
least five seconds will cause the system to report detected PCB troubles, if any, by
blinking the PCB Trouble Indicator, located inside the enclosure. The technique is
described later in this manual.
Page 12
FSS/MC-519 Rev BC
FENWAL
Protection Systems
