The Phares Model 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.
ZS11 Module + Simple On/Off Sensor = Zero Speed Switch
The Phares Model ZS11 Zero Speed Switch Module is particularly useful in applications where more than one relay 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 Zero Speed Switch Module 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.
The ZS11 Zero Speed Switch Module can be integrated with existing industrial control systems or used as a stand-alone unit. It is DIN rail mountable for easy installation.
DC version shown. AC version available.
Figure 1. Phares ZS11 Zero Speed Switch Module Indicators and Terminal Block
A 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 set points.
Product Detail
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Accessories
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.
Figure 5. Sensor mounted with Terminal Strip Assembly (TSA) Box
Sensor Targets
The Phares ZS11 Zero Speed Switch System requires a Sensor and Magnetic Sensor Target suitable for measuring speed. Sensor and Magnetic Sensor Targets are sold separately.
Suitable targets are:
- Magnetic Disk
- Split Coupling
- Gear tooth wheel
- Bolt head or key stock with high ferrous (iron) content already on machine.
The Terminal Strip Assembly (TSA) Box is used to terminate sensor wiring for applications which require long cable runs. It provides quick and convenient mounting for Phares Sensors.
Specifications
| Power Requirements: | Part No. ZS11-A: 100-240 VAC, 116mA, 50/60Hz Part No. ZS11-D: 9-36 VDC, 116mA |
|---|---|
| Circuit Protection: | Internal ½ amp fuse (non-replaceable) |
| Sensor: | Input Signal: 12 VDC, 3 wire, sourcing (PNP) or sinking (NPN) |
| Dimensions (in inches): |
4-5/8″ Wide x 3-1/2″ High* x 3-3/4″ Deep |
| Relay Output: | 3 SPDT Form ‘C’ dry relay contacts (N.O/N.C.) |
| Contact Rating: |
5A at 120 VAC; 5A at 30 VDC |
Figure 2. Phares ZS10 Zero Speed Switch System utilizing an Axial magnetic disk.
Figure 3. Phares ZS10 Zero Speed Switch System utilizing a Radial magnetic disk.
Figure 4. Phares ZS10 Zero Speed Switch System utilizing a Geartooth Wheel already on machine.
Sensor types compatible with the Phares ZS10 Zero Speed Switch Module
- Capacitive
- Encoder
- Gear Tooth
- Hall Effect
- Inductive
- Laser
- Photoeye
Wiring & Installation
- Mount the sensor and aim at a rotating target such as a bolt head, key stock, flat washer, magnet, or Phares Magnetic Disk.
- Connect relay contacts (N.O. or N.C.) to your control circuit.
- Adjust the relay set-point to match your application requirements using the trim pot on the ZS10 Zero Speed Switch.
LED indicators show power, sensor and relay status at a glance.
Frequently Asked Questions
Q: Do I need a separate sensor?
A: Yes. The ZS10 Zero Speed Switch is designed for use with an external sensor. It can be 2 or 3 wire, PNP or NPN. All Phares Electric Hall Effect and Gear Tooth Sensors are compatible.
Q: What happens if the shaft stops?
A: When a stop or under speed condition is detected, the relay LED turns off and the relay disengages, returning to its default (normal) state.
Q: How close should the sensor be to the target?
A: For ferrous targets, a minimum of 1/16″ (6 mm) to approximately 5/16″ (7.94 mm).
When using a Phares Electric magnet or magnetic disk, the recommended sensing distance ranges from approximately 1/4 inch (6.35 mm) to 1 inch (25.4 mm), depending on the specific magnetic target selected.
More Solutions…
ZS09P Zero Speed Switch Sensor
The ZS09P is a compact, self-contained zero speed switch for applications requiring a higher-power relay output. It switches loads up to 5 amps, making it a good choice for directly controlling equipment or control circuits without a separate control module.
ZS09R Zero Speed Switch Sensor
The ZS09R provides the same convenient sensor-and-relay approach as the ZS09P in a smaller package, with a 1-amp relay output. It is particularly well suited for sending speed-status signals to PLCs, VFDs, DCS systems, and other control equipment.
ZS10 Zero Speed Switch Module
The ZS10 is a DIN rail-mounted zero speed switch module that works with your choice of industrial sensor. The sensor must provide a digital square wave signal. This flexible configuration keeps the sensor at the machine while the control module can be mounted safely inside a control panel. The ZS10 is well suited for industrial speed monitoring applications where a separate sensor and control module are preferred.
ZS12 Zero Speed Switch
The ZS12 combines speed sensing and relay control in a rugged cast-aluminum enclosure designed for demanding industrial environments. Its replaceable sensor and point-of-measure installation make it a strong choice where durability, serviceability, and washdown resistance are important.