MODEL 2310 AL MCS-11 REMOTE ENCODER
FIAL INCORPORATED
FC2310_AL-20040506
3
DETAILED DESCRIPTION
ALARM INPUTS:
The 32 alarm inputs are optically isolated. Alarm inputs can be asserted by
connecting the input to station ground or by removing ground from the input. Alarm inputs can be
delayed before asserting an alarm. The external switching device must handle a current of 2
milliamperes. The alarm inputs are scanned every 200 milliseconds. The 32 points are
addressable as a set to the Remote Station Scanner (RSS) or any one of the MCS-11 Remote
Detail Scanners (RDSs). When the alarm points are placed in an RDS, an RSS summary point
may be configured to assert when any of the RDS alarm points are asserted. This summary point
may be placed in any one of the 32 RSS point positions. A normally open relay output may be
configured to close whenever this summary point is asserted. The alarm input connector is a
female 50-pin CHAMP on the rear panel.
RDS points in alarm can only affect a summary bit if the RDS is summarized to an RSS point
(recommended). If you do not map the RDS to a summary point, then RDS alarms in the 2310 AL
will not get polled by the MCS-11 monitoring system unless the RDS is in Rapid Poll or Cyclic Poll.
If the alarm points are mapped to an RDS, and the summary point for the RSS is set to NONE,
then the 2310 AL will not answer RSS polls. This is useful in cases where an RSS already exists
at a site, and you just want to add an RDS using the 2310 AL Encoder. In this case, the summary
relay contacts can be used to set a summary bit in the existing RSS (hard-wired from the 2310 AL
to the radio). Note that the summary relay will be closed when an alarm point is set. It will not be
closed if status points are set.
ALARM POINT VS STATUS POINT:
Each of the 32 inputs may be configured to be an alarm
point or a status point. Once asserted, an alarm point is latched until read (polled). Status points
are not latched -- the state of the point in the scanner changes in real-time with the state of the
input pin. Also, if the 32 points are mapped to an RDS scanner, then a summary point may be set
whenever one or more alarm points are asserted. Summary points are never affected by the state
of a status point.
DELAYED ACTIVATION:
Each of the 32 inputs may have a delay associated with it. This is
useful when you want to ignore short, intermittent events. The delay may be set from one second
up to about 18 hours. For example, if an input has a 10 second delay set, then the point must be
continuously asserted (uninterrupted) at the input pin for a minimum of 10 seconds before the
alarm point is set in the scanner.
CONTROL OUTPUTS:
The 16 control outputs are derived from relays with form-C contacts
(normally open, common, and normally closed contacts). The form-C contacts allow the power-off
default to be wired as normally off or normally on. The 16 control points are addressable as a set
to any one of the 6 MCS-11 Remote Control Decoder Interfaces (RCDIs). The relay output
connector is a female 50-pin CHAMP mounted on the rear panel. The contacts are rated for 1
Amp up to 48 volts DC, 0.6 Amps at 110 volts DC, and 0.6 Amps at 125 volts AC.
The default mode of operation for the control point is ON/OFF. An MCS-11 ON command will
