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EU declaration conformity
HVAC Potentiometer | OFF position | 5-24 VDC supply
Product description
Introducing the SDP-E0US-AT, your solution for precision control in ventilation systems. Designed with advanced features, this potentiometer offers control over EC fans, damper actuators, AC fan speed controllers, or frequency inverters. With a supply voltage range of 5 - 24 VDC, it adapts seamlessly to diverse situations.
Take control with a continuous variable output signal, manualy set through its rotary knob. Thanks to its OFF-position, a simple twist counter-clockwise disables the control signal. Fine-tune your system with adjustable high and low levels via two precision trimmers within the 0 - 100% range of the supplied voltage. This unique feature empowers you to invert the control output, offering flexibility from minimum to maximum or vice versa.
Built for durability, the SDP-E0US-AT boasts a splash-proof enclosure, allowing for either inset mounting (IP44) or surface mounting (IP54). This versatility ensures reliable performance in various environments, providing peace of mind for your ventilation control needs. Whether you're seeking efficiency, precision, or adaptability, the SDP-E0US-AT stands out as the go-to choice for controlling ventilation systems. Elevate your control experience with a device that puts the power in your hands, offering a seamless blend of functionality and durability.
Additional specifications and description
HVAC potentiometer
This potentiometer generates an analogue output or control signal to control other devices such as an EC fan or a fan speed controller. The control signal (potentiometer output) increases or decreases according to the position of the rotary knob. This control signal can directly control EC fans or damper actuators. It can also remotely control AC fan speed controllers (such as Sentera’s EVS or MVS series) or frequency inverters (FI-E series).
For instance, this potentiometer can be installed in the living room while the fan speed controller can be located in a technical room or an electrical cabinet.
Adjustable minimum and maximum level
For some applications, it is desirable to adjust the low limit and the high limit of the control signal. Some EC motors or damper actuators cannot handle control signals that are too low. The low limit of the control signal can be adjusted via a built-in minimum adjustment trimmer. Sometimes, a fan is over dimensioned. In this case, the high limit of the control signal can be reduced via the maximum adjustment trimmer. This will limit the maximum fan speed.
Jumper for output mode selection
The output mode is selected manually using a jumper that is placed onto the header pins. If put on pins 1 and 2, the output mode is voltage; if placed onto pins 2 and 3, it is current; if connected to pins 3 and 4, it is PWM.
What are the limits of the control signal?
The high and low levels are adjustable via two trimmers. Both minimum and maximum output level can be adjusted in the range of 0 - 100 % of the supply voltage. The supply voltage must be in the range of 5 - 24 VDC. This makes it possible to inverse the control output. If the minimum output level is set lower than the maximum output level, the potentiometer will work from minimum to maximum. This is the default factory setting. If the minimum output level is set higher than the maximum output level, the potentiometer will work from maximum to minimum. For example, if your minimum is set to 20 % of the supply voltage (Us) and the maximum is set to 80 % of the supply voltage, you control from minimum to maximum. Then, you will control within 20 - 80 % of the supply voltage (Us). However, if the minimum adjustment setting is 80 % Us and the maximum is 40 %, you will control from maximum to minimum. There is always 20 % minimum control range between the values set by the trimmers.
OFF position
The rotary knob has an OFF position: when the rotary knob is turned completely counterclockwise, the control signal will be disabled. When the rotary knob is turned clockwise, it clicks out of the OFF position. The control signal will immediately jump to its low limit level. In case an EC fan is connected to the potentiometer, it will start and accelerate towards low speed. The EC fan can never be enabled at a speed lower than the selected minimum speed.
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