RayTek MARATHON FA Operating Instructions Manual page 55

The relay is controlled by the temperature selected on the display. If any failsafe code appears on the
display, the relay changes to the "abnormal" state. The exception is the "dirty window" condition.
This causes the relay to change state, leaving a normal numerical temperature output. The dirty
window is detected in either 1‐color or 2‐color mode.
Table 11: Current Output Values in accordance to an Error
If two errors occur simultaneously, the higher priority error is the one that is presented on the LED's
digital and analog outputs. For example, in 2‐color mode, if the internal ambient is too high and the
attenuation is too high, the unit outputs EIHH on the LED's and digital output and 21 mA on the
analog output. However, since 2‐color wide band and narrow band temperatures may all be
presented simultaneously through RS485, their over and under range conditions are independent.
Examples of failsafe conditions:
1. One‐color temperature is selected for display on the LED's. Two‐color temperature is
transmitted in burst mode. Wide band temperature is under range. Two‐color temperature is
999°C.
Outputs:
Display:
RS485:
Analog:
Relay:
2. Two‐color temperature is selected for display on LED's. All three temperatures are
transmitted in burst mode. Two‐color temperature is 1021°C. Wide band temperature is
703°C. Narrow band temperature is 685°C. Attenuation is above 95%, the "dirty window"
threshold.
Outputs:
Display:
RS485:
Analog:
Relay:
Marathon Series FA/FR
Error Code 0 – 20 mA Output
no error according to temperature according to temperature
ECHH 21 to 24 mA
ECUU 0 mA
EIHH 21 to 24 mA
EIUU 0 mA
EUUU 0 mA
EHHH 21 to 24 mA
EAAA 0 mA
EUUU
C T0999
2 to 3 mA
abnormal state
1021
C T1021 W0703 N0685
scaled to temperature, between 4 and 20 mA
abnormal state
Maintenance
4 – 20 mA Output
21 to 24 mA
2 to 3 mA
21 to 24 mA
2 to 3 mA
2 to 3 mA
21 to 24 mA
2 to 3 mA
47