ZS09R Zero Speed Switch Sensor

Overview

The Phares Zero Speed Switch Sensor Model ZS09R is a self-contained device that combines sensor and relay for use in over speed, under speed, and zero speed monitoring. It protects your conveyor or other industrial machinery when it slows down, or stops unexpectedly. The ZS09R Zero Speed Switch Sensor has an adjustable set point for precise, accurate and reliable speed measurement, and reacts quickly if your machine slows down, or stops unexpectedly.

The ZS09R Zero Speed Switch Sensor looks like a prox switch, but incorporates intelligent speed sensing circuitry not found in simple on/off devices. When machine shaft speed reaches the set point, the ZS09R Zero Speed Switch relay output changes state. It remains in this state until under either speed or zero speed condition occurs.

The ZS09R Zero Speed Sensor is designed for switching logic inputs (PLC, VFD, DCS, etc.). For switching higher amperage circuits, please see our ZS09P Zero Speed Switch Sensor. The ZS09R ZSS senses both magnetic and high iron content targets such as a gear tooth, bolt head, key stock, etc.

Outputs are isolated making it easy to incorporate into new or existing systems, or replace an inferior quality or obsolete sensor.

Install at the load pulley on augers, bucket elevators, conveyors, exhaust fans, turbines, and many other applications where machine shaft speed monitoring is needed.

Options

• Custom Cable Length
• Custom Relay Set-Point Adjustment Range
• Fixed Set-Point
• Relay Latch

ZS09R Zero Speed Switch Sensor

Specifications

View or download PDF: ZS09R Spec Sheet

Power Requirements:
Part No. ZS09R-120: 120VAC, 20mA, 50/60Hz
Part No. ZS09R-D: 6-24VDC, 50mA

Relay Output: (specify when ordering)
SPDT Form ‘C’ dry relay contact (Normally Open/Closed)
SPST Normally Open
SPST Normally Closed

Contact ratings:
120VAC, 1/4 Amp pilot duty

Vibration resistance:
G – max. 10-2000Hz

Shock Resistance:
G – max. 11ms, 1/2 sine

Operating Frequency:
Hall Effect and Inductive (Gear Tooth): 0.02Hz – 10kHz
Hall Effect Only: 0.02Hz – 25kHz

Sensing Distance (Gap):
1/16″ to 1/8″ using Gear Tooth Wheel, Bolt Head, Key Stock, etc.
1/8″ to 1/4″ using a Phares Magnetic Disk.
1/8″ to 5/8″ using a Phares Magnet or Magnetic Disk.
(Magnetic target sensing distance based on Phares Magnetic Disks and magnet types).

Minimum Gear Tooth Sizes:
1/8″ gear tooth length, width, depth and gap.

Gear Tooth Material:
High ferrous (iron) content.

Operating Temperature:
-40°F to 140°F

Weight:
4 oz.

Cable:
4 ft., 6 conductor, 22 AWG, unshielded
(Custom cable lengths available.)

Dimensions:

Figure 1. Dimensions of Model ZS09R Zero Speed Switch

Wiring Connections

Figure 2. ZS09R Zero Speed Sensor wiring connections.

There are LED indicators for Relay and Pulse. The Pulse LED illuminates whenever the ZS09R detects a target. The set point is adjusted via 10 turn trim pot.

The ZS09R Zero Speed Switch Sensor requires a target for sensing in order to measure speed.

Suitable Targets Are:
Magnet(s)
Magnetic Disk
Gear Tooth Wheel
Split Coupling
Bolt head or key stock

Figures 3-5. Phares Zero Speed Switch Systems consisting of Zero Speed Switch Sensor and sensing target wheel.

Tech Documents

• ZS09R Spec Sheet
• Operations Manual