The driving force of motor control & electronics cooling. SmartFan Wisp II Speed Control for DC Fans SmartFan Wisp II is designed to control FEATURES small DC fans and includes both a temperature Noise reduction: typically 15 dB(A) or more at idle speed sensor and control circuit packaged in a Completely self contained including sensor probe for convenient remote or on-fan Controls 12 and 24 VDC fans mounting. The controller uses a linear Accepts a supply voltage range of 11.5 to 30 VDC operating principle, applying a smooth DC Design allows maximum flexibility for special applications voltage to the fans. It is available for both 70 C maximum operating temperature Closed-Loop (temperature regulating) and Supplied with 15 inch (24 AWG) wires and mounting clamp Open-Loop (temperature compensating) RoHS (6/6) compliant applications. The controllers power rating is sufficient to control up to three typical 120 mm fans. Wisp II accepts an 11.5 to 30 VDC supply voltage range for controlling 12 and 24 VDC fans. The Wisp II design allows maximum flexibility for special applications including on-off capability, 48 VDC operation, temperature alarm, and custom control parameters. Contact CRI customer service for details. SPECIFICATIONS Maximum Watts Supply Voltage Control Full Speed/Idle Speed 1 Part Number Type 2 Range Temperature Temperatures to Fans 018W135-F 35 C Closed-Loop N/A 018W140-F 11.5 to 30 VDC 20 Watts 40 C 018W135P-F Open-Loop N/A 35 C/23 C 1 Closed-Loop types are installed near equipment exhaust. Open-Loop types at equipment inlet. 2 Air temperature of 70 C or less, air velocity of 200ft/min or greater. CONTROL RESOURCES INCORPORATED For complete product details visit: www.controlres.com DC ControlsWisp II - Installation & Operation INSTALLATION + Mounting RED Mount Wisp in a moving air stream using the cable clamp Vs supplied. Avoid placing the sensor (located at the tip) Supply WHITE near a hot component as this may result in heating by Voltage radiation. To minimize heating of the sensor by the Wisp circuits, avoid mounting the unit vertically with the sensor - BLACK at the top. Location Figure 3. Connection diagram when the temperature Install a closed-loop unit at or near the equipment exhaust alarm output is not used. where it can sense any upstream event that could affect cabinet temperature. Install an open-loop (P suffix) unit at Temperature Alarm Output or near the equipment inlet. A temperature alarm signal is available through the yellow and black wires. An alarm can be indicated using an Connections external LED (Figure 1) or logic circuit (Figure 2). + Alarm Type: Non-Isolated Open-Collector Trigger: 10C above Control Temperature R1 Alarm States: Conducting (Closed), Above Trigger Vs Cut-Off (Open), Below Trigger Supply RED Max. Voltage: 30 VDC Voltage LED Max. Current: 4 mA DC at 0.4 VDC (Logic Circuit), WHITE - 10 mA DC (LED Circuit) YELLOW OPERATION BLACK Fan Speed vs. Sensor Temperature Resistor (R1) = (Vs -2)/ 10, kOhms The relationship between fan speed, as a percentage of full speed, and sensed temperature is shown in Figure 4. Full speed occurs at the Control Temperature (T ). Figure 1. Connection diagram for LED alarm indication. C Minimum speed temperature (approx. 50% of full speed) depends on part number. For closed loop units, the X in + Figure 4 is equal to 4. For open loop units the X in Vs Supply Figure 4 is equal to 12. Votlage RED R2 VA Fan Speed vs. Sensor Temperature WHITE - V1 100% Logic YELLOW Voltage BLACK Above Trigger: Va <= 0.4VDC R2 >= V1 / 4, kOhms Below Trigger: Va = V1 50% Figure 2. Connection diagram for logic circuit alarm T C T - XC C C indication. Figure 4. Fan speed vs. sensor temperature CONTROL RESOURCES INCORPORATED E-Mail: sales controlres.com Web: www.controlres.com