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KWG120-KWG160 Geared Limit Switch

Views of KWG120 and KWG160 rotary limit switches

NK cam operation shown with KS25B4 switch

Quick Guide for Electromechanical Rotary-Linear Limit Switches

Specifications

Enclosure Rating	NEMA/UL 1/4/4X + IP64 Die cast aluminum housing with powder coat finish, made with proprietary copper-free aluminum alloy with corrosion resistance similar to stainless steel.
KS25B4 (K) Switch Rating	Type: Changeover switch Mechanical Life = 10’000’000 cycles (typical) Approvals: VDE Mechanical Life = 20 x 10^6 cycles (typical) Switching Power = 250 VAC/4 A, 60 VDC/1 A Temperature = -40°C to +85°C ingress Protection: IP00 Approvals: VDE
S840 V20 (L) Switch Rating	Type: Changeover switch with wiping action Mechanical Life = 10’00’000 cycles (typical) Resistive Load: 230 VAC/6 A continuous/10 A momentary Inductive Load: 24 VDC//6 A continuous/10 A momentary, 230 VAC/Power Factor 0.7/3 A, 125 VDC/0.5 A, 80 VDC/0.75 A, 40VDC/1 A, 24 VDC/3 A Motor Load: 230 VAC/Power Factor 0.85/10 A Temperature = -40°C to +85°C ingress Protection: IP40 Approvals: VDE, cURus
Cam Programming	Fully programmable double cams = type NK4201.180 1-2 (COM-NC) = Cam valley profile, 4°…180° (1…50%) 1-3 (COM-NO) = Cam valley profile, 4°…356° (1…99%) Repeatability= 1.8°
Mechanical Rating	Max RPM = 1500 rpm Mechanical Life = 10’000’000 cycles (typical) Max Radial (Side) Load = 450 N (100 lbf) Max Axial (Thrust) Load = 200 N (45 lbf) Repeatability: Dependent on gear ratio Hystersis: Dependent on gear ratio Vibration Resistance: 200m/s², 10..2000Hz, IEC 60068-2-6 Shock Resistance: 2500m/s², 6ms, IEC 60068-2-27
MR265 4-20mA 2-Wire Position Transducer Output OPTION	Programmable Output = 4-20mA, (set via Offset and Span trimpots) Power = Loop-Powered, Internal Precision Potentiometer Feedback, 18-30V DC Current Consumption = 4-20mA Power Consumption = Typical 15mA @ 24 VDC (no load) External Burden Resistance = 500Ω Linearity/Accuracy = ± 0.5% Temperature Range = 0-70°C (KWG temperature range derated with this option)
Wire Range	Max 2.5mm², 22-14 AWG External connections via internal Phoenix Contact terminal block
External Interface	Threaded mounting hole(s) for PG16 cable gland (not provided). PG16 cable gland accepts 10-14mm OD cable. Hole= Ø21mm (supplied with cap), KWG120=1, KWG160=2 Hole can be enlarged by user to accommodate other cable glands, conduit hubs, or similar fittings.
Temperature	-40°C to +85°C
Ingress Protection	IP64
Weight	KWG120, 1.5kg (3.3 lbs), typical KWG160, 2kg (4.4 lbs), typical

Ordering Information

For Standard KS25B4 Precision Snap Action Switch:

KWG120-Kx-y-z
KWG160-Kx-y-z

Examples:
KWG120-K4-M100-0
KWG120-K4-M100-1
KWG160-K8-M100-0
KWG160-K8-M100-0

where X equals the number of cam switch channels as follows:

For KWG120 Size Housing (122mm x120mm):

K2 to K5, for KS25B4 switches only
K2 to K4, for KS25B4 switches with MR265 4-20mA Position Output

For KWG160 Size Housing (160mm x 160mm):

K6 to K10, for KS25B4 switches only
K5 to K8, for KS25B4 switches with MR265 4-20mA Position Output

where y equals the gear ratio option, typical range is 2:1 to 1:1 to 2500:1, Bold denote standard ratios, special ratios on request:

Standard Single Stage Step Up Dy ratio options = D2 (2:1)
5tandard Single Stage Step Down Uy ratio options = U1, U1.25, U2, U2.6, U2.75, U3.5, U4, U5, U6.5
Standard Multistage Step Down My ratio options = M12.5, M20, M25, M30, M37.5, M40, M50, M52.5, M75, M100, M200, M300, M420, M600, M750, M1600, M2250, M2500

where z defines MR265 4-20mA loop-powered position transducer output option, 0=No, 1=Yes

For Optional S840 V20 Microswitch:

KWG120-Lx-y-z
KWG160-Lx-y-z

Examples:
KWG120-L2-M100-0
KWG120-L2-M100-1
KWG160-L4-M100-0
KWG160-L4-M100-1

where X equals the number of cam switch channels as follows:

For KWG120 Size Housing (122mm x120mm):

L2 to L3, for S840 V20 microswitches only
L2 only, for S840 V20 microswitches with MR265 4-20mA Position Output

For KWG160 Size Housing (160mm x 160mm):

L4 to L5, for S840 V20 microswitches only
L3 to L4, for S840 V20 microswitches with MR265 4-20mA Position Output

where y equals the gear ratio option, typical range is 2:1 to 1:1 to 2500:1, Bold denote standard ratios, special ratios on request:

Standard Single Stage Step Up Dy ratio options = D2 (2:1)
5tandard Single Stage Step Down Uy ratio options = U1, U1.25, U2, U2.6, U2.75, U3.5, U4, U5, U6.5
Standard Multistage Step Down My ratio options = M12.5, M20, M25, M30, M37.5, M40, M50, M52.5, M75, M100, M200, M300, M420, M600, M750, M1600, M2250, M2500