SMC AR20-N02E4-RZ-D Regulator with Digital Pressure Switch, 1/4" NPT, PNP
SMC
$127.20
The SMC AR20-N02E4-RZ-D is a size 20 modular air regulator with 1/4" NPT ports and an integrated digital pressure switch (PNP output, top wiring entry). It reduces and holds downstream air pressure at a stable setpoint while providing an electronic pressure readout and a switching output, so it can signal a PLC directly instead of relying on a mechanical gauge.
This is the current AR-D generation body. It uses a relieving-type exhaust, the standard 0.05 to 0.85 MPa setting range (approximately 7 to 123 psi), and right-to-left flow. The downward adjustment knob is easy to hold when unlocked, and the product label reads in psi and °F for North American service. The onboard SMC ISE35-series switch monitors outlet pressure and drives a PNP output when pressure crosses the set threshold.
Replacing a legacy unit? The AR20-N02E4-RZ-D is a direct, drop-in replacement for the SMC AR20-N02E4-RZ. See crossover details below.
Key Specifications
| Model | AR20-N02E4-RZ-D |
| Type | Modular air regulator with digital pressure switch |
| Series | AR-D (D-series modular) |
| Body Size | 20 |
| Port Size | 1/4" NPT |
| Digital Pressure Switch | PNP output, top wiring entry (ISE35 series) |
| Pressure Gauge | Without gauge (digital switch instead) |
| Set Pressure Range | 0.05 to 0.85 MPa (approx. 7 to 123 psi) |
| Exhaust Mechanism | Relieving type |
| Max Operating Pressure | 1.0 MPa (145 psi) |
| Bracket | Without bracket |
| Backflow Function | Without backflow function |
| Flow Direction | Right to left |
| Knob | Downward |
| Unit Label | psi, °F |
Proof pressure, temperature ranges, and full digital switch specifications follow the standard AR-D series and ISE35 datasheets. Confirm exact values against the SMC datasheets for your application.
Part Number Breakdown: AR20-N02E4-RZ-D
| AR | Modular air regulator |
| 20 | Body size 20 |
| N | NPT thread type |
| 02 | 1/4" port size |
| E4 | Digital pressure switch: PNP output, top wiring entry |
| R | Flow direction right to left |
| Z | Unit label psi, °F; gauge MPa / psi dual scale |
| D | D-series modular body (current generation) |
Typical Applications
- Pressure regulation with integrated electronic monitoring and a PNP switching signal to a PLC
- Circuits that need a low-pressure or set-point alarm at the regulator without a separate inline switch
- Standard downstream pressure setting in a modular F.R.L. air preparation station
- Right-to-left plumbed stations where the flow direction must match the existing manifold layout
Maintenance Parts
| Valve Assembly | AR24P-060AS |
| Diaphragm Assembly | AR24P-150AS |
| Valve Guide Assembly | AR24P-050AS |
| Digital Pressure Switch | ISE35-R-65-PLA-X523 |
Replacing an AR20-N02E4-RZ
The AR20-N02E4-RZ-D is the current AR-D generation of this regulator, superseding the legacy AR20-N02E4-RZ. SMC maintains panel-mount interchangeability across the generations: the panel mounting pitch carries over, and brackets and set nuts are common to the existing and new products.
|
Legacy Part
AR20-N02E4-RZ
Prior generation
|
→ |
Current Replacement
AR20-N02E4-RZ-D
Current AR-D body
|
The connection, configuration, and mounting all carry over, so it drops into an existing AR20-N02E4-RZ installation without rework:
- Same 1/4" NPT connection and right-to-left flow direction
- Interchangeable panel-mount pitch; brackets and set nuts common to both
- Same relieving-type control and 0.05 to 0.85 MPa setting range
- Same integrated digital pressure switch (PNP output, top wiring entry) and psi / °F labeling
Note: valve, diaphragm, and valve-guide service parts are listed above, along with the ISE35-R-65-PLA-X523 digital pressure switch. If you are transitioning a fleet of older units, standardize your spares inventory on the current AR-D maintenance parts going forward.
Frequently Asked Questions
What does the AR20-N02E4-RZ-D do?
It is a modular air regulator with an integrated digital pressure switch. It reduces incoming compressed air to a stable, adjustable downstream pressure and holds it at the setpoint, while the onboard switch monitors that pressure and provides a PNP switching output.
What is the E4 digital pressure switch?
The "E4" specifies an integrated SMC ISE35-series digital pressure switch with PNP output and top wiring entry. It gives an electronic pressure display and a switching signal that can feed a PLC, replacing the need for a separate mechanical gauge or inline switch.
Does it include a mechanical gauge?
No. This configuration uses the digital pressure switch in place of a mechanical gauge for pressure indication.
What is the pressure setting range?
The standard setting range is 0.05 to 0.85 MPa, roughly 7 to 123 psi, with a maximum operating pressure of 1.0 MPa (145 psi).
Is the AR20-N02E4-RZ-D a direct replacement for the AR20-N02E4-RZ?
Yes. It is the current AR-D generation that supersedes the legacy AR20-N02E4-RZ. The panel-mount pitch is interchangeable and the brackets and set nuts are common to both, so it drops into an existing installation without rework.
The SMC AR20-N02E4-RZ-D is distributed by Automation Distribution, an authorized SMC distributor. For application help, cross-references from legacy AR part numbers, or quantity pricing, contact our team at 1-888-600-3080.
- Body Size:
- 20
- With Backflow Function:
- Without Backflow Function
- Thread Type:
- NPT
- Port Size:
- 1/4
- Bracket:
- Without Bracket
- Digital Pressure Switch:
- E4: PNP Output, Wiring Top Entry
- Pressure Gauge/Mounting Option:
- Without Pressure Gauge, Without Mounting Option
- Set Pressure:
- 0.05 to 0.85 MPa Setting
- Exhaust Mechanism:
- Relieving Type
- Flow Direction:
- Right to Left
- Knob:
- Downward
- Unit Representation:
- psi, degF
- Made To Order:
- Standard
