Full featured universal miniature relays Designed with environment taken into consideration Two terminal styles: plug-in and PCB mount Non-polarized LED indicator available on plug-in relays No internal wires, lead-free construction Cadmium-free contacts Mechanical flag indicator available on plug-in relays Manual latching lever with color coding for AC or DC coil Snap-on yellow marking plate; optional marking plates are available in four other colors Maximum contact ratings: (RU2), A (RU4), A (RU42) UL, CSA, c-ul, EN compliant Lloyd Register type approved. Applicable Standard UL8 CSA C22.2 No. 4 CSA C22.2 No. 4 Mark Certification Organization / File No. UL Recognized File No. E4 CSA File No. LR544 & Pilot Lights Flush Silhouette Emergency Stop Stations Display Lights Operator Interfaces PLCs Softwares EN8- TÜV SÜD EU Low Directive Relays Sockets With Latching Lever Mechanical Indicator The contact position can be confirmed through the five small windows. Standard yellow marking plate is easily replaced with optional marking plates in four colors for easy identification of relays. Lever in the Latched Position Latching Lever Using the latching lever, operation can be checked without energizing the coil. The latching lever is color coded for AC and DC coils. AC coil: Orange DC coil: Green In Normal Operation Timers Terminal Blocks Circuit Protectors Supplies Sensors Non-polarized green LED indicator is standard provision for plug-in terminal, latching lever types Without Latching Lever Mechanical Indicator Non-polarized green LED indicator is standard provision for plug-in terminal, except for simple types. AC/DC Color Marking For identification of AC or DC coils. AC coil: Yellow DC coil: Blue AC Coil DC Coil Note: Turn off the power to the relay coil when using the latching lever. After checking the operation, return the latching lever in the normal position. Relay Coil Tape Colors Coil Rated Tape Color 24V AC White to V AC Clear to V AC Blue 0 to 2V AC Black 2 to 2V AC Red 24V DC Green V DC 2V DC marking on 48V DC yellow tape Ex-proof Boxes Barriers LEDs Safety Products Information L-2
Single Contact Termination Latching Lever Style Part No. DPDT 4PDT Coil Code Standard RU2S- RU4S- A24, A, A, A0, A2 D, D2, D24, D48, D With Latching Lever With RC (AC coil only) RU2S-R- RU4S-R- A, A, A0, A2 With diode (DC coil only) RU2S-D- RU4S-D- D, D2, D24, D48, D Plug-in Terminal (Note ) Without Latching Lever With diode (DC coil only) Reverse polarity coil RU2S-D- RU4S-D D24 Standard RU2S-C- RU4S-C- A24, A, A, A0, A2 D, D2, D24, D48, D With RC (AC coil only) RU2S-CR- RU4S-CR- A, A, A0, A2 With diode (DC coil only) RU2S-CD- RU4S-CD- D, D2, D24, D48, D With diode (DC coil only) Reverse polarity coil RU2S-CD- RU4S-CD- D24 Simple (Note 2) RU2S-NF- RU4S-NF- A24, A, A, A0, A2 PCB Terminal Without Latching Lever Simple (Note 2) RU2V-NF- RU4V-NF- D, D2, D24, D48, D Bifurcated Contact Termination Latching Lever Style Part No. 4PDT Coil Code Standard RU42S- A24, A, A, A0, A2 D, D2, D24, D48, D, D With Latching Lever With RC (AC coil only) RU42S-R- A, A, A0, A2 With diode (DC coil only) RU42S-D- D, D2, D24, D48, D, D Plug-in Terminal (Note ) Without Latching Lever With diode (DC coil only) Reverse polarity coil RU42S-D- D24 Standard RU42S-C- A24, A, A, A0, A2 D, D2, D24, D48, D, D With RC (AC coil only) RU42S-CR- A, A, A0, A2 With diode (DC coil only) RU42S-CD- D, D2, D24, D48, D, D With diode (DC coil only) Reverse polarity coil RU42S-CD- D24 Simple (Note 2) RU42S-NF- A24, A, A, A0, A2 PCB Terminal Without Latching Lever Simple (Note 2) RU42V-NF- D, D2, D24, D48, D, D Note : Plug-in terminal, except for simple types, have an LED indicator and a mechanical indicator as standard. Note 2: Simple types do not have an LED indicator, a mechanical indicator, and a latching lever. Part No. Development Specify a coil voltage code in place of in the Part No. Coil Code Coil Rating A24 24V AC A -V AC A -V AC A0 0-2V AC A2 2-2V AC D V DC D2 2V DC D24 24V DC D48 48V DC D V DC D Accessory Name Part No. Ordering No. Color Code Package Quantity RU9Z-P RU9Z-P PN A (orange), G (green), S (blue), W (white), Y (yellow) Note: Specify a color code in place of the Part No. When ordering, specify the Ordering No. The marking plate can be removed from the relay by inserting a flat screwdriver under the marking plate. L-24
Coil Ratings Rated (V) AC (/ Hz) DC Coil Code Rated Current (ma) ±5% (at C) Coil Resistance (Ω) ±% (at C) Hz Hz 24 A24 49. 42.5 4 - A 9.2-.0 7.8-9.0,4 - A 8.4-.0 7.-8.2 4,5 0-2 A0 4.-5.5 4.0-4. 4,0 2-2 A2 4.2-5.0.-4.2 8,2 D 55 2 D2 24 D24 44.7 5 48 D48 8 2,5 D 9.7,000 D 8.9 2, Note : The rated current includes the current draw by the LED indicator. Note 2: Rated voltage V DC is available for the bifurcated contact only. Contact Ratings Contact DPDT (RU2) 4PDT (RU4) 4PDT (RU42) bifurcated Continuous Current A A Allowable Contact Resistive Inductive (V) Load Load VA AC 0W DC 0VA AC W DC 7VA AC W DC 2VA AC W DC 0VA AC W DC 0VA AC 45W DC 2 AC DC Res. Load Rated Load Ind. Load Electrical Life (operations) 5A,000 min. 5A 0,000 min. 2.5A 0,000 min. 5A,000 min. 5A 0,000 min. 2.5A 0,000 min. DC 0.A 0.4A,000 min. 2 AC DC A 2.A,000 min. A 0.8A 0,000 min. A 2.7A,000 min. A.5A 0,000 min. 0.5A 0.A,000 min. DC 0.A 0.8A 0,000 min. 2 AC A 0.8A,000 min. DC A.5A,000 min. DC 0.44A 0.22A,000 min. Note : On 4PDT relays, the maximum allowable total current of neighboring two poles is A. At the rated load, make sure that the total current of neighboring two poles does not exceed A (A + A = A). Note 2: Inductive load for the rated load cos ø = 0., L/R = 7 ms UL and c-ul Ratings Resistive General Use Horse Rating RU2 RU4 RU42 RU2 RU4 RU42 RU2 RU4 RU42 2V AC A A /HP V DC A A CSA Ratings Resistive RU2 RU4 RU42 RU2 RU4 RU42 RU2 RU4 RU42 2V AC A A /HP V DC A A TÜV Ratings Resistive Inductive RU2 RU4 RU42 RU2 RU4 RU42 2V AC A A 5A 0.8A 0.8A V DC A A 5A.5A.5A Operating Characteristics (against rated values at C) Maximum Continuous Applied Specifications Minimum Pickup Dropout % % maximum % minimum % % maximum % minimum Model RU2 (DPDT) RU4 (4PDT) RU42 (4PDT) Contact Material Contact Resistance * Minimum Applicable Load *2 Silver alloy mω maximum Operate Time * ms maximum Release Time * ms maximum Consumption Insulation Resistance Dielectric Strength Operating Frequency Vibration Resistance Shock Resistance Mechanical Life Electrical Life Operating Temperature *4 Operating Humidity Storage Temperature Storage Humidity Weight Silver (gold clad) Silver-nickel (gold clad) 24V DC, 5 ma V DC, ma V DC, 0. ma (reference value) AC:. to.4va ( Hz), 0.9 to.2va ( Hz) DC: 0.9 to.0w MΩ minimum (0V DC megger) Between contact and coil: V AC, minute Between contacts of different poles: V AC, 00V AC, minute minute Between contacts of the same pole: 0V AC, minute Electrical: 0 operations/h maximum Mechanical: 8,000 operations/h maximum Damage limits: to 55 Hz, amplitude mm Operating extremes: to 55 Hz, amplitude mm Damage limits: 0 m/s 2 Operating extremes: m/s 2 AC:,000,000 operations DC:,000,000 operations See page L-27 and L-29.,000,000 operations PCB terminal: 55 to + C (no freezing) Others: 55 to + C (no freezing) 5 to 85% RH (no condensation) 55 to + C RH (no freezing) 5 to 85% RH (no condensation) Approx. 5g Note: Above values are initial values. *: Measured using 5V DC, A voltage drop method *2: Measured at operating frequency of operations/min (failure rate level P, reference value) *: Measured at the rated voltage (at C), excluding contact bouncing; Release time of AC relays with RC: 25 ms maximum Release time of DC relays with diode: ms maximum *4: Measured at the rated voltage. & Pilot Lights Flush Silhouette Emergency Stop Stations Display Lights Operator Interfaces PLCs Softwares Relays Sockets Timers Terminal Blocks Circuit Protectors Supplies Sensors Ex-proof Boxes Barriers LEDs Safety Products Information Surge Suppressor Ratings Type AC Coil With RC DC Coil With Diode Ratings RC series circuit R: kω, C: 0.0 µf Diode reverse voltage: 0V Diode forward current: A L-25
RU2 (DPDT Contact) Plug-in Terminal PCB Terminal LED indicator, mechanical flag indicator, and marking plate are standard provisions, except on simple types. Available with or without a manual latching lever Marking plate is a standard provision. Not provided with an LED indicator, mechanical flag indicator, and manual latching lever. Photo: RU2S-A Photo: RU2V-NF-A Dimensions RU2S RU2S-C/RU2S-NF RU2V Mechanical Indicator Window (yellow) Mechanical Indicator Window (RU2S-C only) (yellow) (yellow) Latching Lever AC: Orange DC: Green (green) Color Marking AC: Yellow DC: Blue (green) (RU2S-C only) Color Marking AC: Yellow DC: Blue.2 2. 0.8 2. 4 5 8 9 2 4 ø.2 2.2 Hole Mounting Hole Layout 7.0 8-ø Holes.2 2. 4.0 Marking plate removal slot is provided only on one side. Insert a flat screwdriver into the slot to remove the marking plate. 4 5 8 9 2 4 ø.2 2.2 Hole 4. 2.7 All dimensions in mm. Internal Connection (Bottom View) RU2S-* Standard RU2S-*R With RC RU2S-*D With Diode RU2S-*D With Diode ()2 (4)42 ()2 (4)42 Reverse Polarity Coil ()2 (4)42 (5)4 (8)44 (9) (2)4 ()2 (4)42 (5)4 (8)44 (5)4 (8)44 (9) (2)4 (9) (2)4 (5)4 (8)44 (9) (2)4 24V AC/DC or less 24V DC or less 24V DC ()2 (4)42 ()2 (4)42 (5)4 (8)44 (5)4 (8)44 RU2S-NF-*/RU2V-NF-* (9) (2)4 (9) (2)4 ()2 (4)42 (5)4 (8)44 Over 24V AC/DC Blank or C comes in place of to represent types with or without a latching lever. Over 24V DC (9) (2)4 L-2
Electrical Life Curves RU2 (Resistive Load) RU2 (Inductive Load) & Pilot Lights 0 2V AC V DC 0. 5 (,000 operations) 0 AC: cos ø = 0. DC: L/R = 7 ms 2V AC/V DC 0. 5 Flush Silhouette Emergency Stop Stations Display Lights Operator Interfaces PLCs Maximum Switching Current RU2 5 AC resistive AC inductive (cos ø = 0.) Softwares Relays Sockets 0. DC resistive DC inductive L/R = 7 ms Timers Terminal Blocks Circuit Protectors 2 0 Load (V) Supplies Sensors Ambient Temperature vs. Temperature Rise Curves RU2 (AC Coil, Hz) RU2 (AC Coil, Hz) RU2 (DC Coil) Ex-proof Boxes Barriers 2 poles 5A 2 poles 2 poles 5A 2 poles 2 poles 5A 2 poles LEDs Safety Products Information 0 0 0 The above temperature rise curves show the characteristics when % the rated coil voltage is applied. The heat resistance of the coil is C. The slant dashed line indicates the allowable temperature rise for the coil at different ambient temperatures. L-27
RU4 (4PDT Contact) Plug-in Terminal PCB Terminal LED indicator, mechanical flag indicator, and marking plate are standard provisions, except on simple types. Available with or without a manual latching lever Marking plate is a standard provision. Not provided with an LED indicator, mechanical flag indicator, and manual latching lever. Photo: RU42S-A Photo: RU4V-NF-D24 Dimensions RU4S/RU42S RU4S-C/RU4S-NF RU42S-C/RU42S-NF RU4V/RU42V Color Marking AC: Yellow DC: Blue (yellow) 4.0 0.8 2. -4.4 Mounting Hole Layout 7.0.2 4 5 9 2 7 4 8 Mechanical Indicator Window (yellow) Latching Lever AC: Orange DC: Green (green) Mechanical Indicator Window (RU4S-C/RU42S-C only) (yellow) Color Marking AC: Yellow DC: Blue (green) (RU4S-C/ RU42S-C only) 2. 2 ø.2 2.2 Hole 2. ø.2 2.2 Hole 5 9 2 7 4 8 2 4 Marking plate removal slot is provided only on one side. Insert a flat screwdriver into the slot to remove the marking plate. 4-ø Holes 4.4 4. 2.7 All dimensions in mm. Internal Connection (Bottom View) RU4S-*/RU42S-* Standard ()2 (2)22 ()2 (4)42 (5)4 ()24 (7)4 (8)44 (9) ()2 () (2)4 24V AC/DC or less ()2 (2)22 ()2 (4)42 (5)4 ()24 (7)4 (8)44 (9) ()2 () (2)4 RU4S-*R/RU42S-*R With RC ()2 (2)22 ()2 (4)42 (5)4 ()24 (7)4 (8)44 (9) ()2 () (2)4 RU4S-*D/RU42S-*D With Diode ()2 (2)22 ()2 (4)42 (5)4 ()24 (7)4 (8)44 (9) ()2 () (2)4 24V DC or less ()2 (2)22 ()2 (4)42 (5)4 ()24 (7)4 (8)44 (9) ()2 () (2)4 RU4S-*D/RU42S-*D With Diode Reverse Polarity Coil ()2 (2)22 ()2 (4)42 (5)4 ()24 (7)4 (8)44 (9) ()2 () (2)4 24V DC RU4S-NF-*/RU4V-NF-* RU42S-NF-*/RU42V-NF-* ()2 (2)22 ()2 (4)42 Over 24V AC/DC Blank or C comes in place of to represent types with or without a latching lever. Over 24V DC (5)4 ()24 (7)4 (8)44 (9) ()2 () (2)4 L-28
Electrical Life Curves RU4 (Resistive Load) (,000 operations) 0 2V AC V DC RU4 (Inductive Load) (,000 operations) 0 2V AC V DC AC: cos ø = 0. DC: L/R = 7 ms & Pilot Lights Flush Silhouette Emergency Stop Stations Display Lights 0. 0. Operator Interfaces RU42 (Resistive Load) 2V AC V DC RU42 (Inductive Load) 2V AC V DC PLCs Softwares (,000 operations) 0.02 0. (,000 operations) AC: cos ø = 0. DC: L/R = 7 ms 0.02 0. Relays Sockets Timers Terminal Blocks Maximum Switching Current RU4 (Rated Load) RU4 (Maximum Load) RU42 0. DC resistive DC inductive L/R = 7 ms AC resistive AC inductive (cos ø = 0.) 0. DC resistive DC inductive L/R = 7 ms AC resistive AC inductive (cos ø = 0.) 0. DC resistive DC inductive L/R = 7 ms AC resistive AC inductive (cos ø = 0.) Circuit Protectors Supplies Sensors Ex-proof Boxes Barriers 2 0 Load (V) 2 0 Load (V) 2 0 Load (V) LEDs Ambient Temperature vs. Temperature Rise Curves RU4/RU42 (AC Coil, Hz) RU4/RU42 (AC Coil, Hz) RU4/RU42 (DC Coil) A 4 poles A 2 poles A 4 poles A 2 poles A 4 poles A 2 poles Safety Products Information 0 0 0 The above temperature rise curves show the characteristics when % the rated coil voltage is applied. A 2 poles is for the RU4 only. The heat resistance of the coil is C. The slant dashed line indicates the allowable temperature rise for the coil at different ambient temperatures. L-29
Applicable Socket Relay Wiring Style Shape Part No. Rated Current Style Applicable Spring Hold-down Wire Spring Spring SM2S-05A 7A SM2S-05C (Note ) 7A (UL:) Finger-safe SFA-2 SFA- Front Wiring Socket SM2S-05D Slim SFA- SM2S-05DF Finger-safe RU2 SU2S-L 8A (collective mounting) (Note ) Spring-clamp (Note 2) SFA-2 SFA- SM2S-5 Solder Rear Wiring Socket SM2S- PC board SFA- SFA-2 SY4S-5F SM2S-2 PC board SFA-4 SY4S-5F SY4S-05A 7A SY4S-05C (Note ) 7A Finger-safe SFA-2 SFA- Front Wiring Socket SY4S-05D A Slim SFA-2 RU4 RU42 SY4S-05DF (Note ) SU4S-L A A (4-pole) (2-pole) 8A (2-pole, collective mounting (Note ) Finger-safe Spring-clamp (Note 2) SFA-2 SFA-2 SFA- SY4S-5 7A Solder Rear Wiring Socket SY4S- 7A PC board SFA- SFA-2 SY4S-5F SY4S-2 7A PC board SFA-4 SY4S-5F Package quantity: Note : Finger-safe cannot be used with ring ringerminal. Note 2: SU2S-L and SU4S-L are spring-clamp socket which does not require tightening screws. Stranded wire, solid wire, and ferrule can be attached using a screwdriver. Note : When using SU2S-L and SU4S-L at rated current 8A and above, maintain at least mm distance from the adjacent SU socket. Note 4: Front wiring socket can be mounted directly on DIN rail and mounting panel (some sockets need spacers for the ends). L-
Hold-down Springs Style Shape Material Part No. Ordering No. Package Quantity Wire Spring SY4S-5F SY4S-5FPN SFA- SFA-PN SFA-2 SFA-2PN SFA- SFA-PN Stainless Steel pairs Leaf Spring SFA-2 SFA-2PN & Pilot Lights Flush Silhouette Emergency Stop Stations Display Lights Operator Interfaces SFA-2 SFA- SFA-2PN SFA-PN PLCs Softwares SFA-4 SFA-4PN Note : A relay needs a pair of leaf springs, except for SFA-4 (one spring per relay). Note 2: When the wire spring SY4S-5F or leaf spring SFA-4 is used on a relay with latcing lever, lever cannot be opened or closed. Note : Leaf springs (except for the leaf spring SFA-4) cannot be removed after being installed on a socket (except for SM2S-05D and SY4S-05D) Accessories for Sockets Package Name Shape Specifications Part No. Ordering No. Remarks Quantity Aluminum Weight: Approx. 0g BAA0 BAA0PN Length: m DIN Rail Steel Width: 5 mm BAP0 BAP0PN Weight: Approx. g End Clip Zinc-plated steel Weight: Approx. 5g BNL5 BNL5PN BNL BNLPN Used on a DIN rail to fasten relay sockets Relays Sockets Timers Terminal Blocks Circuit Protectors Supplies Sensors Applicable Screwdriver 75 Weight: g (approx.) BCS-SD0 BCS-SD0 45 Used for spring clamp connection (SU2S, SU4S sockets) Ex-proof Boxes DIN Rail Spacer Plastic (black) SA-B SA-B Thickness: 5 mm Used for adjusting spacing between sockets mounted on a DIN rail Barriers LEDs End Spacer Intermediate Spacer Jumper Jumper Plastic (black) Brass jumper with ABS sheath Rated current: A Weight: Approx. g SA-B SA-B SA-4B SA-4B SU9Z-J5 SU9Z-J5PN SM9Z-JF2 SM9Z-JF5 SM9Z-JF8 SM9Z-JF2PN SM9Z-JF5PN SM9Z-JF8PN Used for mounting DIN rail mount sockets directly on a panel surface Used for interconnecting relay coil terminals on a maximum of five SU sockets; can be cut to required lengths Used for interconnecting relay coil terminals on SM2S-05DF sockets; can be cut to required length. No. of sockets: SM9Z-JF2: 2 SM9Z-JF5: 5 SM9Z-JF8: 8 SY9Z-JF2 SY9Z-JF2PN Used for interconnecting relay coil terminals on SY9Z-JF5 SY9Z-JF8 SY9Z-JF5PN SY9Z-JF8PN SY4S-05DF sockets; can be cut to required length SY9Z-JF2: 2 SY9Z-JF5: 5 SY9Z-JF8: 8 Safety Products Information L-
Instructions Before operating the latching lever, turn off the power to the RU relay. After checking the circuit, return the latching lever to the original position. Do not use the latching lever as a switch. The durability of the latching lever is a minimum of operations. When using DC loads on 4PDT relays, apply a positive voltage to terminals of neighboring poles and a negative voltage to the other terminals of neighboring poles to prevent the possibility of short circuits. DC relays with a diode have a polarity in the coil terminals. The surge absorbing element on AC relays with RC or DC relays with diode is provided to absorb the counter electromotive force generated by the coil. When the relay is subject to an excessive external surge voltage, the surge absorbing element may be damaged. Add another surge absorbing provision to the relay to prevent damage. Safety Precautions. Notes on soldering When mounting 2 or more relays on a PC board, keep a minimum spacing of 5 mm in each direction. Manual soldering: Solder the terminals at C within sec., using a soldering iron of W (Sn-Ag-Cu is recommended when using lead-free solder). Auto-soldering: Solder at 2 C within 4 to 5 sec. Use a non-corrosive resin flux. 2. Color coding of coil voltage Coil 24V AC V AC V AC 0 2V AC 2 2V AC 24V DC V DC 2V DC 48V DC V DC Color White Clear Blue Black Red Green marking on yellow tape L-2