Zero Speed Switch Module Model ZS11
Simple On/Off Sensor + ZS11 Module = Zero Speed Switch
The Phares ZS11 Zero Speed Switch Module is an interface between simple on/off sensors and control circuitry enabling over speed, under speed and zero speed measurement.
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The Phares ZS11 Zero Speed Switch Module is particularly useful in applications where more than one sensor is used at a single point of measure to determine varying speeds. The ZS11 Zero Speed Switch Module contains three relay outputs which operate via a single sensor input signal. Each relay output is adjustable, providing three independent speed level settings in one module.
The ZS11 is useful in applications where environmental conditions, such as high temperature, prohibit the use of certain electronics. In these cases, the sensor is installed in the prohibitive area and wired to the Phares ZS11 Zero Speed Switch Module which is located out of the prohibitive area. Use for applications in locations classified as hazardous only when properly coupled with UL approved intrinsically safe barriers and sensors.
The ZS11 can be integrated with existing industrial control systems or used as a stand-alone unit. It is DIN rail mountable for easy installation.
The Phares Electronics Model ZS11 Zero Speed Switch System consists of the Phares ZS11 Zero Speed Switch Module, Sensor and Sensor Target, all sold separately. The Sensor Target can be a bolt head, geartooth, key stock, magnet, reflector, or other target depending upon type of Sensor used.
The Sensor Target is installed/located at the point of measure. Motion is detected when the rotating Target triggers the Sensor. When motion is either detected or reaches setpoint, the relay outputs change state. They remain in this state until either under speed or zero speed condition occurs, depending upon the application.
The Phares ZS11 Zero Speed Switch Module supplies 12 VDC to an external Sensor. The Sensor must be 3 wire, sourcing (PNP) or sinking (NPN) signal. Sensor input signal is configured via two position selector switch located at the top right of the terminal strip.
The Phares ZS11 Zero Speed Switch Module uses frequency input from various types of sensors to determine the presence of motion or the lack thereof. Use the ZS11 for over speed, under speed, and zero speed applications.
Sensor types compatible with the Phares ZS11:
Figure 1. Indicators and Terminal Block
The Phares ZS11 Zero Speed Switch Module has 5 diagnostic LED’s. These LED’s indicate Power, Pulses from Sensor input signal and Relay status. LED’s are labeled Power, Pulse, Relay 1, Relay 2, and Relay 3. There are 3 trim pots which are used for adjusting the Relay setpoints.
Phares ZS11 Zero Speed Switch Module Part Numbers
Relay Contact Rating
|ZS11-A||N.O./N.C. (Form 'C')||5 Amps||100-240 VAC|
|ZS11-D||N.O./N.C. (Form 'C')||5 Amps||9-36 VDC|
Part No. ZS11-A: 100-240VAC, 116mA, 50/60Hz
Part No. ZS11-D: 9-36 VDC, 116mA
Internal ½ amp fuse (non-replaceable)
Input Signal: 12VDC, 3 wire, sourcing (PNP) or sinking (NPN)
Dimensions: (in inches)
4-5/8" Wide x 3-1/2" High* x 3-3/4" Deep
*including DIN Rail Mount and Terminal Block
3 SPDT Form 'C' dry relay contacts (N.O/N.C.)
5A at 120VAC; 5A at 30VDC
The following examples of ZS11 Zero Speed Switch Systems consist of:
- ZS11 Zero Speed Switch Module
- Sensor (sold separately)
- Magnetic Disk Sensor Target (sold separately)
- Terminal Strip Assembly (TSA) Box (sold separately).
Figure 2. Phares ZS11 Zero Speed Switch System utilizing an Axial magnetic disk.
Figure 3. Phares ZS11 Zero Speed Switch System utilizing a Radial magnetic disk.
Figure 4. Phares ZS11 Zero Speed Switch System utilizing a Geartooth Wheel already on machine.
Sensors and Targets
Suitable targets are:
• Magnetic Disk
• Split Coupling
• Geartooth wheel
• Bolt head or key stock with high ferrous (iron) content already on machine.
Phares Electronics Digital Output Hall Effect Sensors and Geartooth Sensors are simple on/off non-contact switching devices. Digital output signal is clean, fast and switched without bounce. They are magnetically activated switches that detect the presence and motion of the shaft speed monitoring target.
Phares Electronics’ Hall Effect Sensors and Geartooth Sensors are produced in a variety of sizes. Contact us for technical support and assistance with choosing a sensor and sensor target for your application.
Figure 5. Sensor mounted with Terminal Strip Assembly (TSA) Box
The Terminal Strip Assembly (TSA) Box can be used to terminate sensor wiring for applications that require long cable runs. It can provide quick and convenient mounting for Phares Electronics Sensors.