SB20
Level controller or power interface module with alarm sounder
Primary output can directly control motors up to
2HP cosF
phase
0.4-0.5 single
2 SPCO relay outputs
Alarm indicator LED and Beeper
1, 2 or 3 sensor inputs
240 or 415Vac supply
DIN rail mounting
T
echnical Specification
Supply Voltage
Sensor Voltage
Sensor Inputs
V
240 or 415ac
V
12Vac
switch contacts or conductive probes
Output 1
SPCO
1500
560
250
28
20
10
8
Outputs
2
Output 2
SPCO
750
not approved
250
not approved
10
10
4
The SB20 is a versatile level control or
interface module that can also be used in
many other process control applications.
One level switch can be connected for an
alarm or two level switches to start and
stop a submersible pump or a solenoid
valve for emptying/filling function
It works with all kind of level switches,
including conductive probes, as well as
pressure switches or other limit switches.
The module can be used as a dry-running
protection, with a pressure switch or filling
level control switch, to start and stop a
pump.
Power supply 240/415 Vac.
Two outputs:
Main output SPCO 20(8) Amps 250V
Secondary output SPCO 10(4) Amps 250V
LED indicator and beeper for low level
alarm
Output ratings
Contact Form
Switching Power Max ac
Switching Power Max dc
Switching Voltage AC Max
Switching Voltage DC Max
Switching Current Max Resistive
(n/o contact)
(n/c contact)
Switching Current Max Inductive
Standard Parts
SB20
VA
W
V
V
A
A
A
Inputs
1, 2 or 3
Other versions can be made for particular applications. Please contact Cynergy3 with your requirements.
Mechanical Diagram
Terminal Assignment
24 23 22 21 20 19 18 17 16 15 14 13
SB20
ON - OFF
CE
4
5
6
7
8
9 10 11 12
90 mm
1
3
4
9
10
11
13
14
15
19-20
21-22
23
24
Supply Neutral
Supply Live 240Vac
Supply Live 415Vac
Output 1 nc contact
Output 1 no contact
Output 1 common
Output 2 no contact
Output 2 common
Output 2 nc contact
Low voltage input sensor
Sensor common input
Sensor minimum level
Sensor maximum level
1
2
3
Cynergy3 Components Ltd.
7 Cobham Road
Ferndown Industrial Estate
Wimborne, Dorset BH21 7PE
Telephone +44 (0) 1202 897969
Email:sales@cynergy3.com
53 mm
Low voltage input 19-20 for pressure/float
switch with contacts closed at minimum
pressure or level switch with contacts
closed when level low.
NB These terminals
must be bridged if no sensor is
connected.
ISO
9001
C E R T I F I E D
www.cynergy3.com
© 2012 Cynergy3 Components, All Rights Reserved. Specifications are subject to change without prior notice. Cynergy3 Components and the Cynergy3 Components logo are trademarks of Cynergy3 Components Limited.
Level controller or power interface module with alarm sounder
The SB20 can be used for many process control functions, including:
Dry running control with 2 level switches
Dry running control with 1 level switch
Dry running control with conductive probes
Pump control by pressure switch
Pump control by level switch
“No water” alarm and secondary control output
Example: Rainwater supply
Filling a vented roof tank from a rainwater tank.
The pump will operate when the roof tank level is
not at max level and the water in the rainwater tank
is above the low level.
The red alarm LED will illuminate and the Beeper
will sound (with switch in ON position), if the level
in the rainwater tank drops to the low level, and the
secondary relay opens a solenoid valve to supply
water from the mains water supply, which will
remain operated until the rainwater tank fills to the
high level. The Beeper alarm will, if switch is ON,
sound until the tank is full.
High level switch (NC
The illustration is for 240Vac supply, which is
connected to terminals 0 (neutral) and 3 (live). when level high)
Low level switch (NC
when level high)
Top tank switch (NC when level low)
Secondary or Alarm circuit
NC
24 23 22 21 20 19 18 17 16 15 14 13
CE
SB20
ON - OFF
1
2
3
4
5
6
7
8
9 10 11 12
nc Common
no
Supply pipe
Pump
Rainwater tank
X
Solenoid valve
Mains water
Example: Process supply
Maintaining a pressurised supply to a process.
The pump will operate when the pressure switch is
below the set level and the water in the supply tank
is above the low level.
The red alarm LED will illuminate and the Beeper
will sound (with switch in ON position), if the level
in the supply tank drops to the low level, and the
secondary relay will operate. The alarm will remain
operated until the tank fills to the high level. The
Beeper alarm will, if switch is ON, sound until the
tank is full.
The illustration is for 240Vac supply, which is
connected to terminals 0 (neutral) and 3 (live).
High level switch (NC
when level high)
Low level switch (NC
when level high)
To process
24 23 22 21 20 19 18 17 16 15 14 13
CE
SB20
ON - OFF
1
2
3
4
5
6
7
8
9 10 11 12
nc Common
no
Pressure switch
Expansion vessel
Centrifugal pump
Supply tank
NB The diagrams shown above are simplified illustrations of how the module may be used and do not include any necessary safety devices, such
as fuses or thermal cutouts, or statutory requirements for installation of such electrical equipment.
ISO
9001
C E R T I F I E D
www.cynergy3.com
© 2012 Cynergy3 Components, All Rights Reserved. Specifications are subject to change without prior notice. Cynergy3 Components and the Cynergy3 Components logo are trademarks of Cynergy3 Components Limited.
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