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Warning! To avoid switch failure determine the actual load of the switch circuit and take steps to protect the switch from voltage spikes, current inrush and line/load capacitance using the following recommendations.
• Surges from coils, motors, contactors, solenoids and tungsten filaments. Transient protection, such as back-to-back zener diodes (Transorb) or an RC network, is recommended for such loads to ensure that maximum ratings of the switch are not exceeded.
• Line capacitance and load capacitance. An in-line resistor can be added in series immediately before the load to limit the inrush current. The resistor can only be added in series with the last wire just before the load. The voltage drop and the power rating of the resistor must also be calculated as follows:
Voltage drop = I • R
Watts = I 2 • R
( I = maximum continuous current of the load)
To verify switch operation with an ohmmeter:
Set range at 20 mega ohms (switches with triac output, set ohm range at 20 kilo ohms). For a normally open switch, the meter will read a high impedance with the actuator away. It will read very high to infinity range (triac switches will read high kilo ohm to infinity range) with the actuator within sense range. You will see the opposite reading for a normally closed switch.
GuardSwitch
™
Series 100
Non-Contact Interlock/Position Switch
125 125-3N-06K
125-3Y-06K
125-4Y-06K
125-4Y-12K
125-6Y-06K
125-6Y-12K
125-7Y-06K
125-7Y-12K
125-8Y-06K
125-8Y-06K-SER25
125-8Y-12K
125-8Y-12K-SER25
125-__________
Dimensions
2.49"
6.32cm
0.42"
1.07cm
0.72"
1.83cm
0.13"
0.33cm
0.63" x 18NC
0.83"
2.11cm
Figure 1
Switch
sensing faces
Actuator
Installation
1. Using the following guidelines, determine a suitable mounting location:
• The switch and actuator must be within the listed sense range. See Ordering/
Electrical Specifications.
• The actuator must be aligned with the switch—labels facing the same direction.
(See Figure 1.)
Important: When mounting in proximity to ferrous material (steel), the sense range can be reduced 50% minimum depending on the shape and type of material. Test the switch in specific applications to determine the actual sense range.
• When mounting on a ferrous material (steel), a 1/4" nonferrous (plastic or aluminum) spacer may be used around the actuator and switch to restore most of the lost gap.
• When mounting on a hinged gate or door, mount the switch and actuator at least
6" away from the hinges to achieve the maximum movement.
• The switch and actuator must move in one of the approved directions.
See Figure 2.
• Do not mount for parallel actuation. An on-off-on signal may result when the actuator passes by the switch.
2. Mount the switch on the stationary frame of the machine and connect the electrical wiring. When mounting the switch on an ungrounded machine, connect the ground lead to one of the mounting screws.
3. Mount the actuator on the movable guard, door, or gate.
P/N 11503 • REV C1 • REB 21FEB13
4. Slightly over-drill holes for easy insertion. The switch and actuator should easily slide or screw into the predrilled holes – DO NOT force or hammer. This may damage switch.
The interlock switch and actuator magnet should be mounted in only three configurations for actuation:
Figure 2
Barrel Switch Mounting Configurations
End-to-End Side-by-Side Perpendicular “T”
OK OK OK NO
Three configurations are appropriate for recessed interlock applications. Moving the actuator parallel to the switch can result in on/off/on signal if the actuator passes by the switch rather than coming to rest in proximity to it. This is NOT a recommended configuration for interlock/position applications. The "T" configuration results in non-actuation.
General Specifications
Enclosure
Temperature Range
Environmental
NEMA Rating
Protection Class
Response Time
Life Cycles
Lead Type
UL
Nickel-plated Aluminum
-40
°F to 180°F (-40°C to 80°C)
Hermetically Sealed Contact Switch
Sealed in Polyurethane
1, 2, 3, 4, 4X, 5, 6, 12
IP 67
1 msec; (150VA)
100,000 Under Full Load;
Up to 200,000,000 Under Dry Circuit
18/2 SJTOW (K)/0.30" (0.76cm)
18/3 SJTOW (K)/0.33" (0.84cm)
All Models
Wire Color Code
Black
White
Red
COM
N.O.
N.C.
File E 122942
Ordering/Electrical Specifications
PART NUMBER
125-3N-06K
125-3Y-06K
CONTACT 1
CONFIG.
N.C.
N.C.
LOAD RATING
AC/DC
100VA/84W
100VA/84W
SWITCHING VOLTAGE
MAXIMUM, AC/DC
SWITCHING CURRENT
MAXIMUM, AC/DC
3 3.0A
3 @34V 3.0A
3 @28V
3 3.0A
3 @34V 3.0A
3 @28V
125-4Y-06K
125-4Y-12K
125-6Y-06K
125-6Y-12K
125-7Y-06K
125-7Y-12K
125-8Y-06K-SER25 5
125-8Y-12K-SER25 5
125-Y
SPDT
SPDT
N.O.
N.O.
100VA/84W
100VA/84W
25VA/25W
25VA/25W
3
3
3.0A
3
3.0A
3
@34V 3.0A
3
@34V 3.0A
3
0.7A@35V
0.7A@35V
@28V
@28V
1.0A@25V
1.0A@25V
N.O.
100VA/84W [email protected]
3 3.0A
3 @34V 3.0A
3 @28V
N.O.
N.O./ triac output
N.O./ triac output
100VA/84W
150VA/NA
150VA/NA
3
Actuator Only Included with all switches unless otherwise noted.
3.0A
3 @34V 3.0A
3 @28V
1.25A@120V
1.25A@120V
4
4
NA
NA
Warning— Each electrical rating is an individual maximum and cannot be exceeded!
1 Configuration with actuator away from the switch
2 Proximity of ferrous materials usually reduces sense range — typically by 50%. The shape and type of material cause a wide diversity of effects.
Testing is required to determine actual sense range for specific applications.
3
Rated at 3.0A for 6,000 cycles only. Other ratings are at 100,000 cycles.
4 Can withstand inrush surge up to 4 amps. Voltage Drop 1.5V. Minimum switch current 30mA.
5 Maximum 10 switches in series; SER25 – Maximum 25 switches in series.
CONTACT SENSE RANGE
RESISTANCE NOMINAL
2
1.0 Ohms
1.0 Ohms
Switch Only
0.5"(1.3cm)
1.0 Ohms
1.0 Ohms
0.2 Ohms
0.2 Ohms
0.5"(1.3cm)
0.5"(1.3cm)
0.6"(1.5cm)
0.6"(1.5cm)
1.0 Ohms
1.0 Ohms
NA
NA
0.5"(1.3cm)
0.5"(1.3cm)
1.0"(2.5cm)
1.0"(2.5cm)
BREAK RANGE
NOMINAL
Switch Only
0.9"(2.3cm)
0.9"(2.3cm)
0.9"(2.3cm)
1.4"(3.6cm)
1.4"(3.6cm)
0.9"(2.3cm)
0.9"(2.3cm)
1.3"(3.3cm)
1.5"(3.3cm)
LEAD LENGTH
NOMINAL
6'(1.8m)
6'(1.8m)
6'(1.8m)
12'(3.6m)
6'(1.8m)
12'(3.6m)
6'(1.8m)
12'(3.6m)
6'(1.8m)
12'(3.6m)
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