Kele Sequencers

Overview

The Kele UCS-221E is a 2-stage sequencer control module for HVAC systems that converts a voltage or current analog input into two SPDT relay outputs with adjustable setpoints and differentials. It accepts 0–20 mA or 0–15 VDC (jumper selectable), operates from 24 Vac ±10% (half-wave) or 24 Vdc ±10%, and provides LED relay status, snap-track mounting and screw-terminal connections. Relay contacts are rated 10 A @ 120 Vac and the unit may be daisy-chained for additional stages. Accepts 0–20 mA or 0–15 VDC input (jumper selectable) with 250 Ω (mA) and 49.7 kΩ (VDC) input impedance Two SPDT relay outputs with adjustable setpoints and factory-set differential (0.5 mA / 0.375 V) and 10 A @ 120 Vac rating 24 Vac ±10% or 24 Vdc ±10% power, LED relay status, snap-track mounting and screw-terminal wiring Product Highlights 2-stage HVAC sequencer; 24 Vac/Vdc operation; 0–20 mA or 0–15 VDC input; two SPDT relays, 10 A rating; snap-track mount. Product Information Standard Information Brand : KELE Manufacturer Part Number : UCS-221E Technical Specifications Brand : Kele MPN : UCS-221E Type : 2-stage electronic sequencer control module Application : HVAC sequencing, boiler/chiller sequencing, VAV control Supply Voltage : 24 Vac ±10% (half-wave) or 24 Vdc ±10% Supply Current : 100 mA @ 24 Vac; 50 mA @ 24 Vdc maximum Input Signal : Analog (0–20 mA or 0–15 VDC, jumper selectable) Input Range : 0–20 mA or 0–15 VDC (jumper selectable) Input Impedance : 250 Ω (mA input); 49.7 kΩ (VDC input)…