SMC ZSE30A-01-N-M Digital Vacuum Switch 0 to -101 kPa

A digital switch made for vacuum circuits

ZSE30A-01-N-M is the vacuum-pressure version of the SMC ZSE30A(F)/ISE30A digital pressure switch. Its rated range is 0.0 to -101.0 kPa, with a resolution of 0.1 kPa, which suits vacuum pad circuits, suction cups, pick-and-place units and ejector systems where the level of vacuum must be confirmed before a part is lifted or moved.

In the code, ZSE30A is the vacuum type (ZSE30AF is the compound type, -100.0 to 100.0 kPa), 01 is R1/8 piping with an M5 female thread, N is one NPN open collector output and M is the fixed SI unit display. No lead wire or bracket is included.

Technical specifications

Where vacuum confirmation helps

A vacuum switch tells the controller whether a pad has really gripped the part. If the part is missing, or porous, or the pad is torn, the vacuum never reaches the set level and the machine can stop before it drops a load or runs an empty cycle. Hysteresis mode and window comparator mode are available, so the same switch can be used to check for a lower limit or for a band of acceptable vacuum.

The set pressure range reaches slightly past the rated range (up to -105.0 kPa), but the accuracy is guaranteed only inside the rated range.

Setting and connecting

Settings can be copied from a master unit to as many as ten slave units, and a secret code can lock the keys. The display shows kPa or MPa according to the fixed SI unit (M), so no unit changeover is possible with this code. Anti-chattering times from 20 ms to 2000 ms can be chosen to stop the output flickering when the pad vibrates.

Because the withstand pressure of the vacuum type is only 500 kPa, do not connect it to a line that can see the full 1 MPa of a supply; use the ISE30A for positive pressure instead. The NPN output pulls to 0 V, so match it with the input type of your PLC.

Documents and quotation

The SMC ZSE30A(F)/ISE30A catalogue PDF below has how-to-order, specifications, piping options and dimensions. Please confirm pressure type, piping, output and unit before ordering. Other instruments are listed under Pressure Instrumentation. Seven Star LLC is an independent supplier and quotes the exact code on request.

ZSE30A-01-N-M Status & Successor

SMC has discontinued the ZSE30A(F)/ISE30A series. Its catalogue names the ZSE20(F)/ISE20 series as the new models, so the current successor for vacuum is the SMC ZSE20, with ZSE20F for compound pressure. Use the ZSE30A-01-N-M details on this page to maintain or replace switches already in service. Before you change to a ZSE20, check its piping, output, connector and mounting against the ZSE20 catalogue, because they are not automatically interchangeable.

Additional ZSE30A-01-N-M Specifications

How the ZSE30A-01-N-M Works

A silicon piezoresistive diaphragm senses the vacuum at the R1/8 port. The internal circuit compares the measured value with the set point and switches the NPN open collector output. The two-colour display can be set so that the reading changes colour when the output turns on, which makes it easy to see whether a pad has gripped. In window comparator mode the output is on only while the vacuum is within an upper and lower setting, which can detect both a missing workpiece and a blocked suction line.

Auto-preset for vacuum pads

With auto-preset, the switch measures the vacuum during repeated suction and release cycles with the real workpiece and calculates the set value by itself. The catalogue gives the formula P = A – (A – B)/4, using the measured maximum and minimum values. This removes guesswork when a new pad or part is introduced.

Other functions

• Display calibration within ±5% of the reading
• Peak and bottom hold display
• Key lock, with an optional secret code
• Zero clear within ±7% F.S. of atmospheric pressure
• Power saving mode and display resolution change from 1/1000 to 1/100
• Copy function for up to ten units with the ZS-38-U copy unit

Wiring & Accessories

• Wire colours: brown DC+, blue DC–, black OUT (NPN).
• Lead wire with connector, 3 cores, 2 m: ZS-38-3L; with connector cover: ZS-38-3G.
• Brackets ZS-38-A1, ZS-38-A2 or ZS-38-A3; panel mount adapter ZS-27-C; panel adapter with front protection cover ZS-27-D.

Installation & Maintenance

• Fit a suction filter between the pad and the switch, so that dust and debris do not reach the sensor.
• Tighten the R1/8 thread with a spanner on the metal port only.
• Carry out zero clear with the port open to atmosphere.
• If the overcurrent error is shown, the load current is 80 mA or more; correct the load and restart the power.

Typical Applications in Oman & the GCC

Vacuum confirmation on pick-and-place units, packaging machines, sheet handling and ejector circuits in plants across Oman and the GCC.

Why Source the ZSE30A-01-N-M from Seven Star LLC

Seven Star LLC supplies SMC vacuum switches across Oman and the GCC. Request a quote, and our team can help confirm the correct ordering code for a replacement or for the ZSE20 successor.