Specifications

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WHEN YOU NEED IT RIGHT, RIGHT NOW, CALL KELE.
kele.com888-397-5353 USA
March 2014
Supply Voltage 24 VAC ±10%, half-wave; or 24 VDC
±10%
Supply Current 220 mA @ 24 VAC;
110 mA @ 24 VDC maximum
Input 0-20 mA or 0-15 VDC, jumper
selectable
Input Impedance 250Ω (mA input);
49.7 kΩ (VDC input)
Wiring Terminations Screw terminals
Accuracy ±1%
Output Six SPDT relays, adjustable via
setpoint potentiometers
Relay Differential Factory set at 0.5 mA or 0.375V,
adjustable using plug-in resistors
Relay Output Rating 10A @ 120 VAC
Operating Temperature 32° to 158°F (0° to 70°C)
Operating Humidity 5% to 95% RH (non-condensing)
Weight 0.7 lb (0.32 kg)
RoHS Statement Ye s
Warranty 1 year
KELE SEQUENCER CONTROL MODULE - SIX STAGE
UCS-621E
DESCRIPTION
The UCS-621E is a solid-state device used for multistage
control in HVAC systems, sequencing boilers or chillers, or
floating/tri-state control of VAV boxes from a single analog
signal. The UCS-621E can be used to obtain a digital output
from a voltage or current producing sensor. Units may be
daisy chained to provide additional stages of control, and a
mounting track is supplied for easy installation.
OPERATION
The UCS-621E accepts a 0-20 mA or 0-15V input signal to
produce a six-stage relay output. Each relay has a multi-turn
potentiometer adjustment to set the pull-in point. Each of
the six relays is jumper-selectable to pull in on either a rise
or fall in signal. Individual relay differential is easily adjusted
by using different value plug-in differential resistors. Multiple
UCS models can be daisy chained to operate additional
stages from one input signal. A maximum of eight slave units
can be daisy chained.
SPECIFICATIONS
2.25
(5.72)
5.25
(13.34)
Depth: 1.19
(3.02)
in
(cm)
CH
V
mA
SEQ FLT SEQ FLT
123456
SEQ FLT
1 2 3 4 5 6
24V
POWER
COMMON
SIGNAL
INPUT
CHAIN
OUTPUT
FLT
SEQ
FEATURES
• Six stages of relay control
• Voltage or current input
• 24 VAC/VDC power
• LED indication of relay status
• Adjustable relay setpoints
• Adjustable relay differentials
• Snap-track mounted
DIMENSIONS