Beckett RWF40 Manual - Manual (Page 53)

HVAC Products CC1B7865en 01.09.2005 53/57
11. Technical data
For resistance thermometers in a 2-wire circuit, with fixed filter time constants
(21 h 18 min for weather-dependent setpoint enable)
Type
Measured value range
Pt1000, IEC 751 -200...+850 °C (-328...+1562 °F)
Ni1000, DIN 43760 -60...+250 °C (-76...+482 °F)
LG-Ni1000 -50...+160 °C (-58...+320 °F)
Sampling time: 6 seconds
Potential-free contact for changeover of operating mode:
− Modulating burner, when contact is open, LED on the front is not lit
− 2-stage burner, when contact is closed, LED on the front is lit
Potential-free contact for the following functions, depending on the configuration:
− No function
− Setpoint shift
− Setpoint changeover
4 relay outputs, 1 analog output (optional) and a transducer supply are provided as
standard.
Relay output (N.O. contact)
Contact rating: AC 24…240 V, 2 A at p.f. (cos
ϕ) > 0.6
Contact life: > 2 x·10 5 switching cycles at rated load
Internal contact protection: Varistor S07K275
2 relay outputs (N.O. contacts) with a common pole, for actuating device open / close
Contact rating: AC 24…240 V, 2 A at cos
ϕ > 0.6
Contact life: > 2 x·10
5
switching cycles at rated load
Internal contact protection: RC combination (C = 2.5 nF, R = 100
Ω)
Relay output (N.O. contact)
Contact rating: AC 24…240 V, 2 A at cos
ϕ > 0.6
Contact life: > 2 x·10 5 switching cycles at rated load
Internal contact protection: Varistor S07K275
11.1.3 Analog input 3 (outside temperature)
Resistance thermometer
11.1.4 Binary input «D1»
11.1.5 Binary input «D2»
11.2 Outputs
11.2.1 Output 1 (release of burner)
11.2.2 Output 2, 3 (floating output)
11.2.3 Output 4 (limit comparator)