EXCEL 50 INSTALLATION INSTRUCTIONS
17
EN1B-0101
Analog Inputs
Technical Description
Analog outputs can be used, for example, to operate valve or
damper actuators. The characteristic curves for these
actuators can be defined via MMI (see Excel 50 User Guide).
Each analog output can also be used as a digital output.
Technical Specification
Number:
Four analog outputs
Analog output details:
Voltage
0 to 10 V, max. 11 V
Current
max. 1 mA
Resolution
8-Bit
Min. step:
0.043 mV
Accuracy
±
100 mV
±
1 digit
Relay Modules
The relay modules facilitate the control of peripheral devices
with high load via the analog outputs of the controller. The
connection examples (for the relay modules MCD 3 and
MCE 3) are shown here.
IMPORTANT
The external supply of the relay modules must be
24 Vac, the same as of the supply of the controllers.
The analog outputs are protected against
overvoltage up to 24 Vac and 35 Vdc.
Supply:
Several relay modules can be connected in series via the
bridged terminal pair:
24 Vac:
Terminals 11/12 of the relay
24 Vac (-):
Terminals 13 to 16 of the relay
Fig. 29. Analog outputs, connection of relay MCD 3.
MCD 3:
Relay terminal 17 controls the changeover contact K3.
Relay terminal 18 controls the ON contacts K1, K2.
Ground can be looped through terminals 2/3.
Fig. 30. Analog outputs, connection of relay MCE 3.
MCE 3:
Relay terminal 16 controls the ON contact K3.
Relay terminal 17 controls the changeover contact K2.
Relay terminal 18 controls the changeover contact K1.
