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Kele UCS-621 Quick Start Manual
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UNIVERSAL SEQUENCER CONTROL MODULEMODEL UCS-621OUTPUT TRANSDUCERSKELE & ASSOCIATES • P O Box 34817 • Memphis, TN 38184 901-937-4900 • FAX 901-372-2531 • E-mail info@kele.comDESCRIPTIONThe Model UCS-621 is a solid-state device used formulti-stage control in HVAC systems, sequencing boil-ers or chillers, or floating control of VAV boxes from asingle analog signal. The UCS-621 can be used toobtain a digital output from a voltage or current produc-ing sensor. The UCS-621 is supplied with mountingtrack for easy installation.FEATURES• 6 stages of relay control• Voltage or current input• 24 VAC or 24 VDC power• LED indication of relay status• Adjustable relay setpoints• Adjustable relay differentials• Snap-track mountedOPERATIONThe UCS-621 accepts a 0.5-20 mA or 0.375-15 VDCsignal to produce up to six stages of relay output. Eachrelay has a multi-turn potentiometer adjustment to setthe pull-in point. Each of the six relays is jumper-selec-table to pull in on either a rise or fall in signal. Individualrelay differential is easily adjusted by using differentvalue plug-in differential resistors. The UCS-621 consid-ers an input signal below 0.5 mA or 0.375 V to be a lossof signal and all relays will de-energize.Supply voltage 24 VAC ±10% @ 300 mA24 VDC ±10% @ 150 mAInput signal 0.5-20 mA or 0.375-15 VDCjumper-selectableOutput 6 SPDT relaysRelay rating 5A @ 120 VACAccuracy & repeatability ±1%Setpoint adjustment 25-turn potentiometersInput impedance 250 Ω (mA input),30 kΩ (V input)Operating temp range 32° to 158°F (0° to 70°C)Humidity limit 5-95% RH noncondensingDimensions 3.25"H x 6.0"W x 1.375"D(8.25 cm x 15.24 cm x 3.49 cm)Relay differential 0.5 mA or 0.375V(adjustable by plug-indifferential resistors - seewiring diagram)Weight 0.7 lb (0.32 kg)SPECIFICATIONSSIG123456123456 MAV61 2 3 4 53.25(8.25)6.0(15.24)DIMENSIONSin(cm) |
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