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Signal Post Processing Details
Time
Normal State
7.6 Outputs
7.6.1 Analog Output (current loop)
A current loop output circuit, which can be set either to 0-20mA or 4-20mA output current range,
drives the analog output signal. It can be connected directly to a recording device (e.g., chart
recorder), PLC, or controller. The whole analog output circuit impedance is limited to 500Ω. The
current loop resolution through a 16Bit DAC (Digital Analog Converter) per temperature unit is better
than 0.1 (°C or °F) over the total measurement range. A specific feature for the testing or calibrating of
connected equipment allows the current loop output to bet set to specific values, under range or over
range in RS485 or LAN/Ethernet operation mode. Via such functionality you can force the circuit,
operating in the 4-20mA mode, to transmit an output current less than 4mA (e.g. 2.0 or 3.0mA) or
above 20mA (e.g. 21.0 or 22.0mA).
7.6.2 Relay Outputs
The relay output is used as an alarm for failsafe conditions or as a setpoint relay. Please refer to
section 11.2 Fail-Safe Operation on page 55. Relay output relate to the current target temperature,
displayed on the green 7-segment LED display. The relay output can be used to indicate an alarm
state or to control external actions. The relay functionality can either be set to
by the control panel (user interface), an RS485 or LAN/Ethernet command in dependence of the
connected equipment. The relay PO and PC state can be used to detect wiring problems between the
Endurance sensor and the process environment, where the relay contact signal acts as a trigger.
7.6.3 Trigger
AVERAGE, PEAK HOLD or VALLEY HOLD can be reset by shorting the Trigger input signal to
Ground for a minimum of 10 msec. This can be done either with a momentary switch or a relay. The
Reset signal causes a new reading of the current measured temperature and restarts the selected signal
post processing function.
38
info@Raytek-Direct.ca
Relay Changes State
Alarm
Normal State
Figure 24: Deadband Example
NO (NORMALLY OPEN), NC (NORMALLY CLOSE),
PO (PERMANENTLY OPEN), PC (PERMANENTLY CLOSE)
Rev. E1 Sep 2015
962°C
Setpoint: 960°C
958°C
Alarm
ENDURANCE 1R
1.800.868.7495
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