SC2 D

SC2/D
SC2/D
SC2/D
Signal converter, two stages on-off
• Twostagesinsequenceorbinary(threestages)
• Switchableforheatingorcooling
• Inputsignal0-10V
SC2/Disatwostagessignalconverterforcontrollingin
HVAC-systems.
• Adjustablehysteresisandstep-differential
• CompactformforeasymountingonaDIN-rail
Function
SC2/D is a two stage signal converter which converts a
0-10V signal into two closing relay outputs and can be set
for heating or cooling.
SC2/D comes in a standard casing for DIN-rail mounting
and has all settings accessible on the front.
Control modes
Switches 1-3 are used to set the relay sequence to fit the
application.
SC2/D can be adjusted for the following applications:
- One stage cooling and one stage heating
- Two stages cooling
- Two stages heating
- Three stages cooling, binary
- Three stages heating, binar
Setpoint
The setpoint is determined by means of the setpoint
knob on the front. The scale is from 0 to 10V and the
value determines at which input signal the first stage is
to be cut out. The stage activates when the input signal
exceeds the set-point by the value shown on the switch
marked DIFF, (the hysteresis).
Hysteresis
The difference in input signal between a relay´s ON-point
and OFF-point. Adjustable and equal for all steps.
Step differential
The difference in input signal between the relay´s OFF-
points.
Indication
SC2/D has LEDs which indicates that power is on and
that relay outputs are activated.
revision
11 2011