180°
L2
A1
A2
Reed Switch
K8
*
Reed Switch
KD
*
+
+
2K2 - 2W
*
D = 20 ~ 40m
22R 5W
220R 5W
R
R
K8
*
L2
A2
L1
A1
On
available technical specifications
Flow Switches and Level Switches for liquids
Reed Switches are hermetically sealed
contacts actuated by a magnetic field.
The life expectancy of a reed switch refers to a kind of load to be
used. Reed Switches of the highest reliability are applied in our
sensors, and their life expectancy can reach above two million
operations. However, when they are switching lamps, inductive or
capacitive loads, this number may decrease.
Switching Power
It is important to consider that the power specified by an electrical
load is often referred to the permanent working state.
For higher power, use an auxiliary relay or contactor as recom-
mended below.
Reed Switch 20W/VA: Protect the electrical contact of your sensor
Electrical contact of sensors -
Attention to install
The sensors work in all voltage and current ranges displayed in the table bellow:
Operating Voltage
Max. Switching Power Max. Switching Current
Peak Current
110Vac
20VA
0.2A
0.5A @20ms
220Vac
20VA
0.1A
0.5A @20ms
5Vdc
2.5W
0.5A
1A @20ms
12Vdc
5W
0.5A
1A @20ms
24Vdc
10W
0.5A
1A @20ms
24Vac:
NOT recommended
! Never connect the sensor to a
motor, pump, lamp or any other
load over 20W.
Always use a contactor or relay.
NO/NC - SPST
Contact ON/OFF
Switch
Output
Enclosure Rating
Resistor 220R 5W
in series is required
Resistor 22R 5W
in series is required
For distances longer than 40m,
use 24Vdc voltage (without the resistor)
K8
*
Filter mounted in parallel
with the coil of an AC contactor,
increases the contact life.
KD
*
Filter mounted in parallel
with the coil of a DC relay,
increases the contact life.
*
For sale on
Level Switches
Manual: Models for External Mounting
IMPORTANT!
YOU MUST CHECK BEFORE INSTALLATION
Connection with cable
length 20 to 40 meters:
contactor
pump
Operation
NC
Normally Open
Normally Closed
Typical connection to contactor
Term of Warranty
Siemens 3RT1015 Contactor
Initial: 31.7VA
Rated: 5.1VA
0.1µF 400V
BY448
or
1N4007
Important
: For distances
greater than 40m
, use 24Vdc voltage.
•Timing relay
•Frequency inverter
•Etc.
Connection with:
- Timing Relay
- Frequency Inverter
For installation with Relay Coupler,
use 4K7 10W resistor
Important
: For installation with
relay coupler
, use 4K7 10W resistor.
Manual
B.03/Feb2019
Connection with
Contactor 24Vdc
KD Filter
is required
*
*
Connection with Contactor
Should be less than
20W
Initial Power
Rated Power
Questions? Call us BEFORE you install:
+55 (15)
3032.9190
|
NO
NO
or
NC
rotating the
sensor
For installations according to this guide:
02 (two) years warranty.
Incorrect installation cancels the warranty.
All sensors have been tested and approved during the manufacture process.
Chemical products
require tests by the customer to verify compatibility
with the constructive material of the sensor.
Liquids with ferrous particles
require technical analysis: the sensor has
magnetic component inside.
Note:
Reed Switches have reached over one million operations in
tests with contactor and
*
On
check models and prices of Filters
PROTECTION PROCEDURES BELOW DESCRIBED CAN
IMPROVE THE REED SWITCH PERFORMANCE
• Switching inductive loads
? Risk of failure (welding of the Reed Switch Contact)
due to CAPACITANCE, which
can occur depending on the distance and cable used in the connection to the contactor.
• Connecting the sensor to a contactor in long distances, use resistor:
This resistor dampens the peak voltage caused by the
capacitance of cables and electronic equipment input.
• Connecting the sensor to an electronic equipment:
+55 (15)
3032.9190
Contactor
Contactor