Galvanic Separation - Siemens RWF40.000A97 User Manual

4.4 Galvanic separation

HVAC Products
The diagram shows the maximum potential differences that may exist between the
function modules in the controller.
3 analog inputs
Input 1:
Actual value
for Pt100, Ni100,
Landis & Staefa Pt1000,
LG-Ni1000
thermocouples or
standard signals
Input 2:
External setpoint,
setpoint shift
for resistance 0...1 k W ,
or standard signals
Input 3:
Outside temperature
for Landis & Staefa Pt1000,
LG-Ni1000
2 binary inputs
for potential-free contacts
D1: Operating mode
changeover
D2: Setpoint shift /
changeover
Transducer supply
DC 24 V , 30 mA
(short-circuit proof)
Analog output
(optional)
Output 5:
Analog output,
DC 0...10 V,
DC 0...20 mA, 4...20 mA
Serial interface
RS-485 (optional)
MOD bus protocol
Technical earth TE
7865f07e/1202
CC1B7865en
4. Electrical connections
Limit comparator
Output 4:
- Relay (N.O. contact)
Release of burner L1, N:
Output 1:
- Relay (N.O. contact)
Floating output L1, N:
Output 2:
- Relay (actuating device opens)
Output 3:
- Relay (actuating device closes)
Operating voltage L1, N:
±
AC 100...240 V 10 %,
48...63 Hz
Max. insulation voltages:
DC 50 V
AC 400 V
AC 4000 V
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