Specifications

FTB 312-4 Revision 4 – 1-8-2008 7
Status LEDs
The status LEDs display alarm and mode
information as follows:
LED
Indication
NITE ERR Incorrect night intensity.
DAY ERR Incorrect day intensity.
PEC ALM Photocell alarm. The
PEC failed to transition
within 19 hours.
WHT ALM Combination of DAY ERR
and PEC alarm.
RED ALM Combination of NITE
ERR and PEC alarm.
MKR ALM Detected markers have
fallen below the level set
by the options switch.
FAN Not used.
SYNC The Master / Slave
Interconnect is active.
Flashes during normal
operation.
CONF A valid flash has been
detected.
DAY Day mode operation.
NITE Night mode operation.
MKRS Marker output is active.
RS-485 Setup
RS485TERM and RS485PUP are open by
default and should be shorted only on the
last 2903800 board in the series of
equipment connected to an FTM-5000 as
shown in Figure 2-10.
Internal Red Jumper
Always shorted for the FTB 312-4.
Optional Modem Card
The 2903801 modem board is installed in
the lower left corner of the board.
The terminal block can be removed for
easy connection of the phone wires.
The modem is included with all “E”
(Eagle) systems or can be added later as an
upgrade to non “E” systems.