Specifications

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March 2014
SEQUENCER CONTROL MODULE - TWO STAGE
UCS-221E
Note: Chain out is used to connect the
master unit to the first slave.
Additional slaves are connected
from signal input to signal input.
Signal
(mA or V)
24 VAC/VDC
Jumper should be
in chain (CH) position
when using
UCS-221E
as a slave unit.
Plug-in Differential Resistors (1/4W, 1%)
18.2 k
Ω = 0.5 mA or 0.375V (factory supplied)
See Table 1 for other differentials.
Connections to
UCS slave units
(Max eight units)
24V Power
Te rminal
Common
Te rminal
Signal Input
Te rminal
TABLE 1. OTHER DIFFERENTIALS
Other Differential Resistors can be used
(customer supplied)
9.1 kΩ
= 0.25 mA or 0.1875V
36.5 kΩ = 1.0 mA or 0.75V
54.9 kΩ = 1.5 mA or 1.125V
73.2 kΩ = 2.0 mA or 1.5V
+
–
+
–
Factory Relay Settings
Relay 1: 5.3 mA, 4V
Relay 2: 6.6 mA, 5V
Relay Contact Wiring for
Floating/Tri-state Control
(set mode Jumper in FLT position)
1
2
CW CCW
COM
Make all connections according to the diagram below or as shown on the job diagrams and in compliance with national
and local codes. Make all connections with power removed. Failure to do so could result in circuit board damage. Use
shielded #18-gauge cable for connections from the UCS-221E to the controller, shield grounded at the controller.
1 2
24 V
POWER
COMMON
SIGNAL
INPUT
CHAIN
OUTPUT
1
SEQ
CH
V
MA
FLT
2
1 2
24 V
POWER
COMMON
SIGNAL
INPUT
CHAIN
OUTPUT
1
SEQ
CH
V
MA
FLT
2
WIRING
ORDERING INFORMATION
MODEL DESCRIPTION
UCS-221E Sequencer control module, two relay outputs, field calibrated
UCS-221E-C Sequencer control module, two relay outputs, pre-calibrated (specify settings when ordering)
1. Set jumpers to desired position as follows:
Mode jumper - In FLT position, Relay 1 energizes on a decrease in signal. In the SEQ position, Relay 1 energizes on an
increase in signal. Relay 2 always energizes on an increase in signal.
Input jumpers - Select mA position for a 0-20 mA input, or V position for a 0-15 VDC input. If the UCS-221E is used as a slave
control, place the bottle-plug jumper in the chain position.
2. Connect a meter in series with the SIGNAL INPUT terminal and the 0-20 mA (+) signal to read a current signal. To read a
voltage input, connect across the COMMON (-) and SIGNAL INPUT (+) terminals.
3. Adjust the input signal to the desired pull-in current or voltage for Relay 1.
4. If Relay 1 LED is on, turn setpoint adjustment potentiometer clockwise (counterclockwise if Relay 1 has mode jumper in FLT
position) until it de-energizes; otherwise, proceed to step 5.
5. Adjust Relay 1 pull-in point by turning the setpoint adjustment potentiometer counterclockwise (clockwise if Relay 1 has mode
jumper in FLT position) until the relay energizes. (The potentiometers are 25-turn potentiometers.)
6. Repeat steps 3, 4, and 5 for Relay 2 using setpoint adjustment potentiometer.
7. When using a 0-20 mA input, the CHAIN OUTPUT produces a 0 to 12 VDC signal, which is proportional to the input signal.
Connections should be made between CHAIN OUTPUT and COMMON. If a voltage input is used, the CHAIN OUTPUT is
directly proportional to the input.
SETUP / CALIBRATION
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