Block Diagram - Siemens RWF40 Series User Manual

4.2 Block diagram

Landis & Staefa Division
3 analog inputs
Input 1:
Actual value
for Pt100, Ni100, Pt1000,
Ni1000 thermocouples or
standard signals
Input 2:
External setpoint,
setpoint shift
Ω
for resistance 0 - 1 k
or linearised
standard signals
Input 3:
Outside temperature
for Pt1000, Ni1000
2 binary inputs
For potential-free
contacts
Input 1:
Operating mode
changeover
Input 2:
Setpoint shift / changeover
Operating voltage
AC 100 ...240 V,
±10 %, 48...63 Hz
7865f01e/0200
CC1B7865E
4. Electrical connections
,
February 10, 2000
Release of burner
Output 1:
- Relay (N.O. contact)
3-position output
Output 2:
-Relay (reg. unit opens)
Output 3:
- Relay (reg. unit closes)
Limit comparator
Output 4:
- Relay (N.O. contact)
Transducer supply
DC 24 V, 30 mA
(short-circuit-proof)
Modulating output (optional)
Output 5:
Modulating output,
DC 0...10 V, DC 0...20 mA,
DC 4...20 mA
Serial interface (optional)
RS-485
MOD bus protocol
Baud rate 9600
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