Hydac EDS1791-N-100-000 – Electronic Pressure Switch | EDS 1791 Series Platform
Engineering Background
The Hydac EDS 1791 series represents Hydac International’s precision-engineered electronic pressure switch platform, designed for demanding hydraulic and pneumatic control applications. Manufactured in Germany to ISO 9001 standards, the EDS1791-N-100-000 delivers reliable pressure monitoring with integrated switching output — eliminating the mechanical wear inherent in traditional pressure switches.
Product Positioning
Targeted at OEM machine builders, hydraulic system integrators, and MRO procurement engineers, the EDS1791-N-100-000 is the preferred choice where compact form factor, high repeatability, and long service life are non-negotiable. It is a direct-fit replacement for legacy electromechanical pressure switches in mobile hydraulics, industrial presses, and process automation circuits.
Complete Technical Specifications
| Part Number | EDS1791-N-100-000 |
| Brand / Manufacturer | Hydac International GmbH |
| Series | EDS 1791 |
| Function | Electronic Pressure Switch with Switching Output |
| Measuring Range | 0 – 100 bar |
| Switching Output | PNP / NPN (N-type: NPN open-collector) |
| Supply Voltage | 10 – 30 V DC |
| Output Current | Max. 250 mA |
| Pressure Connection | G 1/4 A (male, per ISO 1179-2) |
| Electrical Connection | M12 × 1 connector, 4-pin |
| Ingress Protection | IP 67 (per IEC 60529) |
| Operating Temperature | −25 °C to +85 °C |
| Media Temperature | −25 °C to +85 °C |
| Burst Pressure | 3 × FS (300 bar) |
| Repeatability | ≤ ±0.5% FS |
| Hysteresis | Adjustable |
| Housing Material | Stainless Steel / Brass |
| Weight | Approx. 120 g (unit); shipping weight 2,100 g |
| Country of Origin | Germany (DE) |
| Certifications | CE, RoHS |
Proven Application Environments
- Mobile Hydraulics: Excavators, cranes, agricultural machinery — monitors hydraulic circuit pressure for load-sensing and safety cutoff.
- Industrial Presses & Injection Molding: Clamp pressure monitoring, die-protection circuits, and end-of-stroke confirmation.
- Machine Tools & CNC Centers: Coolant pressure supervision, spindle lubrication monitoring.
- Process Automation: Pneumatic actuator control, filter differential pressure monitoring, compressor protection.
- Renewable Energy: Wind turbine pitch hydraulics, solar tracker actuator systems.
Engineering Advantages
- No Moving Parts: Solid-state sensing element eliminates mechanical fatigue — rated for >10 million switching cycles.
- Compact & Flush-Mount Ready: Miniaturized housing integrates directly into manifold blocks without adapters.
- Wide Supply Voltage Range (10–30 V DC): Compatible with 12 V mobile systems and 24 V industrial PLCs without additional conditioning.
- Adjustable Switching Point & Hysteresis: Field-configurable via front-panel buttons — no special programmer required.
- IP 67 Sealed: Withstands wash-down, immersion, and high-humidity environments.
- EMC Compliant: Meets EN 61000 for noise immunity in variable-frequency drive environments.
System Architecture & Signal Flow
The EDS1791-N-100-000 uses a piezoresistive sensing cell to convert hydraulic pressure into a proportional electrical signal. An internal ASIC conditions the signal, compares it against the user-programmed setpoint, and drives the NPN open-collector switching output. The M12 connector carries: Pin 1 = V+ supply, Pin 3 = GND, Pin 4 = switching output. The output can be wired directly to a PLC digital input (sink-type) or relay coil without additional interface modules.
Typical Wiring (NPN, Load to V+):
V+ (Pin 1) ──┬── Load ──┐
│ │
│ OUT (Pin 4) ── NPN collector
│ │
GND (Pin 3) ──────────── NPN emitter ── GND
Sourcing & Quality Verification
- All units sourced through authorized Hydac distribution channels or verified surplus with full traceability documentation.
- Each unit undergoes incoming inspection: visual check, label verification (date code, country of origin), and functional pressure test where applicable.
- Original Hydac packaging, datasheet, and certificate of conformance supplied upon request.
- Konmask.com maintains a zero-counterfeit policy — units failing authentication are quarantined and returned to supplier.
Procurement Process
- Confirm Part Number: Verify EDS1791-N-100-000 against your BOM or existing unit label.
- Request Quote: Contact support@konmask.com for volume pricing, lead time, and availability confirmation.
- Place Order: Purchase online or via PO — we accept T/T, PayPal, and major credit cards.
- Shipping: DHL / FedEx express worldwide; EXW Xiamen available for freight consolidation.
- Documentation: Commercial invoice, packing list, and CoC provided with every shipment.
Technical FAQ
Q: Can the EDS1791-N-100-000 replace a mechanical pressure switch directly?
A: Yes — the G 1/4 pressure port and M12 electrical connector are industry-standard. Verify setpoint range and output polarity (NPN vs PNP) before substitution.
Q: Is the switching point factory-set or field-adjustable?
A: Field-adjustable via the integrated push-buttons on the front face. No external programmer or software required.
Q: What media is compatible?
A: Mineral hydraulic oil (HLP), water-glycol (HFA/HFC), phosphate ester (HFD), and most non-corrosive gases. Consult Hydac for aggressive media.
Q: What is the lead time for EDS1791-N-100-000?
A: In-stock units ship within 1–3 business days. Contact us for current stock status and bulk availability.
Q: Do you provide a warranty?
A: 12-month warranty against manufacturing defects. Warranty claims processed within 5 business days.
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