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10 | Appendix: Technical data

D-LX 201/721

Ranges 2 (A and B)

Range selection (B) 24 V ±20%, I ~ 6 mA

Table10.3: Devices for zone 1/21 (housing M4 and S2)

The flame monitor is constructed with potential separation between the supply voltage

(24 V

) and the device's internal voltage. The analogue output is galvanically isolated

with the device's internal voltage.

10.4 Sighting tube connection and purge air connection

Sighting tube connection G 1¼" inner thread

NPT 1¼" female

(option)

Purge air connection G ½" inner thread

NPT ½" female

(option)

Table10.4: Specifications of the basic device

10.5 Factory settings

Analogue output 4 … 20 mA (e.g. for flame intensity)

Flame Failure Detection Time (FFDT)

Range A

Range B

1 s

Table10.5: Factory settings (specified on the type label)

If no particular specifications are entered with the order, the flame monitor will be sup-

plied with the standard settings specified above. These factory settings must only be

changed in the factory. They must be indicated on the type label so that they are

clearly visible from the outside.

The switches described in section 8 Flame monitor settings [}71] and the Modbus ter-

mination are set as follows on delivery:

Gain characteristic curve V7‘

Flame intensity switching threshold 0

Flicker frequency switching threshold 0

Modbus slave address 1

Modbus termination OFF

Table10.6: Factory settings (not specified on the type label)

These factory settings can be adapted to the system conditions at any time.

DURAG D-LX 201 User Manual

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