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OPTIONAL RELAYS
The LS2000 can be furnished with factory
installed relays — two programmable alarm
relay outputs and one fault relay output. All
relays are sealed and provide form C (NO/NC)
contacts. The high and low alarm relays are
programmable, and can be set for latching / non-
latching operation, and a normally energized /
de-energized coil (see Table 3). The low alarm
cannot be set above the high alarm threshold.
Alarm configuration can be done with the HART
or Modbus interface. The onboard multi-color
LEDs indicate a LOW alarm condition via a
flashing red color, and a HIGH alarm condition
via a steady red color. Latched alarms can be
reset using the internal magnetic switch, an
external switch connected to the calibration line
terminal, a HART Field Communicator, or Modbus
communication. A short-duration magnetic
switch activation of one second will reset latched
alarms. Holding the magnetic switch closed for
a three second duration will start the calibration
sequence.
When the optional relays are ordered, the LS2000
receiver is certified for Ex d operation. Alarm
relays are not available with the LON version.
EQP VERSION
The Eagle Quantum Premier model provides
proprietary digital signals that are compatible
with the EQP network. No analog 4–20 mA signal
output is provided. Modification of alarm thresholds,
latching / non-latching settings, and gas type
should be configured on the S
3
point configuration
software. S
3
has the capability to rewrite
configurations completed on HART and Modbus
communications. The onboard HART and Modbus
RS-485 RTU communications are operational and
can be used to modify certain settings without the
chance of a rewrite, specifically the heater settings.
Refer to the EQP Appendix within this manual for
additional information.
OPTIONAL COMMUNICATION LINK
By connecting the transmitter and receiver
via a three-wire shielded cable, an optional
“communication link” can be created between the
two devices.
The communication link offers the following
advantages:
1. Single point system diagnostics – The link
offers the ability to view device variables of the
receiver while connected to the transmitter, or
vice versa (using a HART handheld or Modbus
device). These variables include signal
strength, status, and configuration parameters
such as alarm set points, heater settings, gas
type, etc.
2. Dynamic lamp power – The link enables
the system to optimize lamp power per the
application. This optimization only happens
during the zero calibration process.
3. Synchronized LEDs on each device can
signal a common system status condition.
Without the link, the transmitter is unable to
signal alarm status.
4. Transmitter variables can be configured via
connection to the receiver. Configurable
transmitter variables include lamp power and
heater settings.
NOTE
Alarm setpoints in the receiver cannot be
changed from the transmitter.
5. The communication link provides the ability to
initiate Calibration from either the transmitter
or receiver.
For retrofit applications where an inter-
connecting wire is not available or possible, the
system can operate without the link. If the link
is not connected, the system will not indicate a
“link fault.”
A “link fault” feature can be enabled (using a
HART handheld or Modbus device), which will
indicate a fault if the link is broken. The “link
fault” can only be detected and annunciated by
the receiver.
NOTE
The default setting for the”link fault”
feature is Disabled.
NOTE
A l l t h i rd - p a r t y p e r fo rm a n c e a n d
hazardous location approvals apply
with and without the communication link
connected.
HISTORY LOGS
Non-volatile memory is provided in the receiver
to save a record of the 100 most recent
calibrations and 1000 most recent alarm/fault
events. Operating temperature and voltage of
the receiver are also recorded with each event
log. A real time clock is provided for time
stamping events. This information is accessible
using HART or Modbus communication.