Siemens RWF40 Series - Analog input 2 (external setpoint, setpoint shift); Analog input 3 (outside temperature); Binary input D1; Binary input D2

52/56 CC1B7865E February 10, 2000 Landis & Staefa Division
11. Technical data
For resistance thermometers in a 2-wire circuit, with fixed filter time constants
(21 h 18 min for the weather-dependent setpoint enable)
Type Measured value range
Pt1000 -200...+850 °C
Ni1000 DIN 43760 -60...+250 °C
Ni1000 from Landis & Staefa -50...+160 °C
Sampling time: 6 s
Potential-free contact for operating mode changeover:
−
Modulating burner, when the contact is open, LED on the front is not lit
−
2-stage burner, when the 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 modulating 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 regulating unit 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 (3-position output)
11.2.3 Output 4 (limit comparator)