SENVA PRU1 Series Pilot Relay Instruction Manual

SENVA PRU1 Series Pilot Relay

Specifications

• General:
  • Environmental Operating: -30 to 60oC (-22 to 140oF), 10-95% RH non-condensing
  • Expected Relay Life : 100,000 cycles electrical; 10,000,000 mechanical
  • LED Device: ON when energized
  • Wiring: Field Wiring – 16 minimum lead length; coil: 18AWG; contacts: 12AWG; HOA monitor wires: 12 AWG; status: 18AWG
  • Field Wiring: Coil – 16AWG to 18AWG, Contacts – 12AWG to 14AWG
• Certifications: UL1015, Plenum Rated (UL2043)
• Dimensions:
  • Small Enclosure: 1.75 x 3.0 x 1.75 with 0.5 NPT nipple
  • Medium Enclosure: 2.5 x 4.0 x 1.78 with 0.5 NPT nipple
• Environmental Ambient temp: 60oC

Product Usage Instructions

Installation

1. Disconnect, lock out, and tag out all power supplies during installation.
2. This device shall be installed on an enclosure via a 1/2 NPT nipple.
3. Secure the relay to the enclosure by screwing the provided conduit nut to the 1/2 NPT nipple threads.
4. Connect the relay coil to the control system by connecting the common (white and yellow conductor) to the control ssystem’scommon or negative (-) terminal. Then choose either the High (white and black conductor, 120VAC) or Low (white and blue conductor, 24-30VDC/24VAC) depending on the control system voltage being sent to the relay coil and connect to the positive (+) terminal of the control system.
5. Connect relay contact wires to the application load being controlled by this relay. This will differ between SPDT and SPST contact arrangements. See the wiring diagrams at the end of this guide.
6. For relays with status output (PRU1CM and PRU1SM), connect (gray conductors) to control system terminals that will be monitoring the status of the application load.
7. For relays with the Hand/Off/Auto (HOA)(PRU1S and PRU1SM) switch, leave the switch in AUTO to control the application load from the control system driving relay coil. Put HOA in HAND to bypass the control system and turn on the application load. Putting the switch in OFF will not allow the application load to turn on.

DANGER: FAILURE TO FOLLOW THESE INSTRUCTIONS MAY RESULT IN DEATH OR OTHER SERIOUS INJURY

• Follow ALL requirements in NFPA 70E for safe work practices and Personal Protective Equipment (USA) and other applicable local codes when installing this product.
• Only qualified electrical personnel should install this product.
• Read, understand, and follow all instructions thoroughly.
• Install only on insulated conductors.
• Lock out and tag out all power sources before installation or working on equipment.
• Use a properly rated voltage sensing instrument to determine no voltage is present.

Hazard of electrical shock, explosion, and arc flash.

WARNING

IMPORTANT WARNINGS

• Equipment monitored/operated by this device may start without warning. Keep clear of apparatus at all times
• Only qualified trade installers should install this product
• This product is not intended for life-safety applications
• Do not install in hazardous or classified locations
• The installer is responsible for all applicable codes
• This product must be installed in a suitable electrical enclosure

Automated equipment may start without warning.

PRODUCT APPLICATION LIMITATION
Senva products are not designed for life or safety applications. Senva products are not intended for use in critical applications such as nuclear facilities, human implantable device or life support. Senva is not liable, in whole or in part, for any claims or damages arising from such uses.

INSTALLATION

Disconnect, lock out, and tag out all power supplies during installation

1. This device shall be installed on an enclosure via a 1/2” NPT nipple.
2. Secure relay to enclosure by screwing the provided conduit nut to the 1/2” NPT nipple threads.
3. Connect relay coil to control system by connecting the common (white and yellow conductor) to the control systems common or negative (-) terminal. Then choose either the High (white and black conductor, 120VAC) or Low (white and blue conductor, 24-30VDC/24VAC) depending on control system voltage being sent to the relay coil and connect to positive (+) terminal of the control system.
4. Connect relay contact wires to the application load being controlled by this relay. This will differ between SPDT and SPST contact arrangements. See wiring diagrams at the end of this guide.
5. For relays with status output (PRU1CM and PRU1SM), con-nect (gray conductors) to control system terminals that will be monitoring status of application load.
6. For relays with the Hand/Off/Auto (HOA)(PRU1S and PRU1SM) switch, leave switch in AUTO to control application load from control system driving relay coil. Put HOA in HAND to bypass control system and turn on application load. Putting the switch in OFF will not allow application load to turn on.

SPECIFICATIONS

Revised 03/04/2024 Document #152-0415-0C

FAQ

• Q: What are the product application limitations?
  • A: Senva products are not designed for life or safety applications. They are not intended for use in critical applications such as nuclear facilities, human implantable devices, or life support systems. Senva is not liable for any claims or damages arising from such uses.
• Q: What are the contact ratings for PRU1C/PRU1CM models?
  • A:
  • 10 Amp Resistive @ 277 VAC
  • 10 Amp Resistive @ 28 VDC
  • 480 VA Pilot Duty @ 240-277 VAC
  • 480 VA Ballast @ 277 VAC
• Q: What are the contact ratings for PRU1S/PRU1SM models?
  • A:
  • 600 Watt Tungsten @ 120 VAC (N.O.)
  • 240 Watt Tungsten @ 120 VAC (N.C.)
  • 1/3 HP @ 120 VAC (N.O.)
  • 1/6 HP @ 120 VAC (N.C.)

References

• Senva inc: Gas Sensors, Toxic Sensors, Dry Pressure Sensors, Wet Pressure Sensors, Humidity/Temp Sensors, Current Switches, Current Transducers, Energy Measurement, Relays, Leak Detection, IoT Solutions, Smart Sensors

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