3
The current time is transmitted via the CAN bus and any addressable sensor will receive
it. Those addressable sensors with a local LCD display will show this time in addition to
the gas concentration data etc.
Button action on the FMC-60 panel can be protected by a Key lockout connection to
prevent misuse. However, muting the buzzer which sounds if an event occurs can still be
silenced by pressing the accept button (1).
On board relays with voltage free contacts indicate alarm and fault states and additionally
4 relays are dedicated to Option Voting whereby sensors can be grouped and the relay is
activated when a number of sensors have gone into alarm. These groups can also be
used for time weighted average alarms covering the requirements of 15 minute and 8
hour measurements. Additionally, all 8 onboard relays and the first 16 of the external
relays have a programmable delay to de-energise parameter which for example allows for
fan evacuation of a space containing detected gas. These relays and the first 16 relays
on the remote relay board can be set to be normally energised or de-energised.
Front panel LEDs indicate the general state of the panel. The red alarm LED will flash for
new alarms until accepted/muted when it stays on constantly until reset. The amber fault
LED comes on if a fault is present. If any sensor channel is inhibited the amber inhibit
LED will be on.
Additional reset and mute terminals are available to allow remote action in the event of an
alarm or fault condition. Test facilities are included in engineering mode, which allow these
relays to be manually activated during commissioning.
