steve
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Got hold of Sime for a Carrier card for a chiller. Machine down in a factory. Received the new card in express time machine and plant now up and running fantastic service form Sime
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787950
Pilz 787950 available at EU Automation. Get in touch today for a quick price.
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What happens next?
1. Email confirmation
You will get an email confirming that we have received your enquiry.
2. Dedicated Account Manager
One of our team will be in touch to confirm your part(s) specification and condition.
3. Your quote
You will receive a comprehensive quote tailored to your specific needs.
The Pilz 787950 PSWZ X1P C is a compact standstill monitoring relay designed for use with single-phase and three-phase motors. It detects the electromagnetic voltage generated as a motor slows down, allowing reliable identification of a standstill condition without requiring external speed sensors.
Operating from a versatile 24–240 V AC/DC supply, the unit supports measuring voltages up to 690 V and offers an adjustable switching threshold from 120 to 3000 mV. Its outputs comprise two normally open contacts, one normally closed contact and two semiconductor outputs. The 45 mm-wide housing features plug-in, spring-loaded terminals for straightforward panel installation, while a broad operating temperature range of -10 to 55°C supports use in varied industrial environments.
Operating from a versatile 24–240 V AC/DC supply, the unit supports measuring voltages up to 690 V and offers an adjustable switching threshold from 120 to 3000 mV. Its outputs comprise two normally open contacts, one normally closed contact and two semiconductor outputs. The 45 mm-wide housing features plug-in, spring-loaded terminals for straightforward panel installation, while a broad operating temperature range of -10 to 55°C supports use in varied industrial environments.
| Specification | Description |
|---|---|
| Manufacturer | Pilz |
| Part Number | 787950 |
| Product Type | Standalone standstill monitoring relay |
| Model | PSWZ X1P C 3V/24-240VACDC 2n/o 1n/c2so |
| Function | Monitors the electromagnetic voltage generated as a motor runs down |
| Motor Inputs | Measuring inputs for single-phase and three-phase motors |
| Supply Voltage | 24–240 V AC/DC |
| Maximum Measuring Voltage | 690 V |
| Measuring Circuit Frequency Range | 0–3,000 Hz |
| Adjustable Response Threshold | 120–3,000 mV |
| Reset Value | Twice the configured response threshold |
| Relay Outputs | 2 normally open contacts and 1 normally closed contact |
| Semiconductor Outputs | 2 |
| AC Power Consumption | 5 VA |
| DC Power Consumption | 3 W |
| AC-1 Contact Rating | 6 A at 240 V AC |
| DC-1 Contact Rating | 6 A at 24 V DC |
| AC-15 Contact Rating | 3 A at 230 V AC |
| Contact Material | AgCuNi with 0.2 µm gold plating |
| Terminals | Plug-in spring-loaded terminals |
| Mounting Position | Any orientation |
| Ambient Operating Temperature | -10°C to +55°C |
| Humidity Rating | 93% relative humidity at 40°C |
| Condensation | Not permitted |
| Overvoltage Category | III / II |
| Pollution Degree | 2 |
| Front Plate Material | ABS, UL 94 V-0 |
| Width | 45 mm |
| Height | 101 mm |
| Depth | 121 mm |
| Net Weight | 325 g |
| Approvals | CCC, CE, UKCA, cULus Listed, EAC and TÜV |
| RoHS Conformity | Yes |
| REACH Information | Contains lead and lead oxide above 0.1% |
| Harmonised System Code | 85364900 |
| ECLASS Reference | 27371811 |
| ETIM Classification | EC001448 |
What is this relay designed to do?
It is a standalone standstill monitoring relay designed for single-phase and three-phase motors. It detects the voltage generated while a motor runs down and changes its outputs when the configured standstill threshold is reached.
How does the standstill monitoring function work?
The relay monitors the electromotive voltage produced by the motor during rundown. When this measured voltage falls below the configured response level, the unit identifies that the motor has reached standstill.
What supply voltage range can the unit accept?
The Pilz 787950 accepts a supply voltage from 24 V to 240 V AC or DC, making it suitable for a broad range of industrial control systems.
Can it monitor both single-phase and three-phase motors?
Yes. Its measuring inputs are designed for use with both single-phase and three-phase motors.
What outputs are provided?
The unit provides two normally open relay contacts, one normally closed relay contact and two semiconductor outputs.
What is the adjustable response range?
The response threshold can be adjusted from 120 mV to 3,000 mV. The reset value is twice the selected response value.
What is the maximum motor measuring voltage?
The measuring circuit is rated for a maximum motor voltage of 690 V.
What measuring frequency range does it cover?
The measuring circuit operates across a frequency range of 0 to 3,000 Hz.
What are the relay contact ratings?
For AC-1 applications, the contacts are rated up to 6 A at 240 V. For DC-1 applications, they are rated up to 6 A at 24 V. Under AC-15 conditions, the rating is up to 3 A at 230 V.
What type of electrical terminals are fitted?
The relay uses plug-in spring-loaded terminals, allowing straightforward integration into an industrial control panel.
What are the unit's dimensions?
The housing measures 101 mm high, 45 mm wide and 121 mm deep.
What is the permitted operating temperature range?
The specified ambient operating temperature is from -10°C to 55°C. Condensation is not permitted.
Can the relay be installed in any mounting position?
Yes. The manufacturer specifies that the unit may be installed in any mounting position.
How much power does the unit consume?
Power consumption is rated at 5 VA when supplied with AC and 3 W when supplied with DC.
Which approvals and conformity marks apply?
The listed approvals and marks include CE, UKCA, CCC, cULus Listed, EAC and TÜV. The unit is also stated as conforming to applicable RoHS requirements.
What is the approximate weight of the relay?
The net weight is approximately 325 g, with a stated gross weight of 330 g.
- Monitoring motor standstill after a controlled stop
- Detecting residual motor voltage during rundown
- Supervising single-phase and three-phase motor applications
- Preventing machine access until hazardous motion has ceased
- Controlling guard unlocking once a motor has stopped
- Monitoring rotating machinery such as conveyors, mixers and centrifuges
- Confirming standstill before maintenance or machine intervention
- Providing relay and semiconductor outputs for machine control circuits
- Supporting automated production and material-handling equipment
- Monitoring motors across a wide 24–240 V AC/DC supply range
This content has been produced using multiple sources. EU Automation takes no responsibility for the accuracy of this information. Always consult the original equipment manufacturer for the most up to date instructions and information.
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Customer reviews
steve
Daniel
Excellent customer service...
Alex Bailey is my main point of contact at EU Automation...he is extremely friendly, has exceptional customer service skills and always offers great pricing & lead times.
3 months ago
Jerry Schrink
Tom Higgins provided amazing service
Tom Higgins provided great prompt service. I contacted Tom by phone and within 10 minutes there was a quote in my in box. WOW Thank you Tom and Thank you EU Automation!
3 months ago
Paulo Pereira
Excellent service and communication…
Excellent service and communication from Alex Bailey. He truly goes above and beyond to ensure his clients are 100% satisfied. The entire process was seamless, and his attention to detail made a huge difference. Highly recommended for anyone looking for amazing service!
4 months ago
Gary
Tom Higgins did a great job at getting…
Tom Higgins did a great job at getting us the part we needed. He saw a concern with the part a verified before shipping.
4 months ago
Lessle Smith
Thomas Higgins has gone above and…
Thomas Higgins has gone above and beyond to make things happen for my facility. His customer service and knowledge were an asset in helping me with my order and the logistics challenges!
5 months ago
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