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Phone: +86 16626708626Description
- Key Technical Specifications
| Parameter | Value |
| Manufacturer | Pilz |
| Part Number / Order No. | 301120 |
| Product Type | PNOZ X2.1 |
| Supply Voltage | 24 V AC/DC |
| Power Consumption | 2.0 W (DC) / 4.5 VA (AC) |
| Safety Contacts | 2 Normally Open (N/O) instantaneous |
| Auxiliary Contacts | None |
| Operating Modes | Single-channel, dual-channel with/without detection of shorts across contacts |
| Reset / Start Options | Automatic start, manual start |
| Terminal Type | Fixed screw terminals |
| Dimensions (H x W x D) | 87 mm x 22.5 mm x 121 mm |
| Mounting | Standard 35 mm DIN rail |
| Operating Temperature | −10 to +55 °C (+14 to +131 °F) |
- Product Introduction & Supply Chain Strategy
The Pilz 301120 (PNOZ X2.1) is a compact 22.5 mm DIN-rail mounted safety relay designed to monitor E-stop pushbuttons, safety gates, and optoelectronic protective devices. It processes input signals through dual-channel logic to interrupt safety circuits reliably upon demand, preventing machinery restarts until safety conditions are restored.
This product is a Brand New Surplus unit. It is not used, not pulled from a decommissioned plant, and not refurbished. All modules undergo rigorous quality verification to ensure OEM-level reliability. Refurbished safety relays carry severe hidden risks of contact welding, degraded coil insulation, or mechanical fatigue, which can result in catastrophic safety interlock failures. Securing this module as New Surplus maintains 100% functional safety integrity, lowers total cost of ownership (TCO), and prevents unscheduled line stoppages during emergency machine maintenance.
301120
301120
- Installation & Configuration Guide
Stage 1: Pre-Installation (Prep & Safety)
- Disconnect and lock out all power sources feeding the control cabinet before servicing safety circuits.
- Ensure a grounded ESD wrist strap is worn during wire termination.
- Document current wiring terminals (S11, S12, S21, S22, A1, A2, 13, 14, 23, 24) and photograph existing connections.
Stage 2: Removal
- Unplug or unscrew input, output, and power supply wiring from the terminal blocks.
- Release the DIN rail mounting latch at the bottom rear of the enclosure using a flathead screwdriver.
- Pivot the unit upward and remove it from the 35 mm DIN rail.
Stage 3: Installation (Clone & Seat)
- Snap the new Pilz 301120 safety relay onto the 35 mm DIN rail until the locking clip clicks securely into place.
- Verify jumper links for automatic or manual start mode on the control terminals per your electrical schematic.
- Reconnect wiring to the screw terminals according to your documented wiring diagram.
Stage 4: Power-On & Testing
- Apply 24 V AC/DC control power across terminals A1 and A2.
- Verify the POWER LED lights green and the CH.1 / CH.2 status LEDs indicate correct channel input state.
- Actuate the connected E-stop or safety gate interlock to verify that output contacts 13-14 and 23-24 open instantly.
- Firmware/Software Versions & Upgrade Notes
- Hardware Architecture: The Pilz 301120 is a hardwired electromechanical/electronic safety relay and does not require firmware loading or software parameterization.
- Compatibility Notice: Directly replaces legacy PNOZ X2 family variants operating at 24 V AC/DC with matching terminal layout.
- Replacement Caution: Ensure external contact fuse protection (6 A fast or 4 A slow-blow fuse on output lines) is installed according to IEC 60947-5-1 to protect output relays against short-circuit welding.
- Frequently Asked Questions (FAQ)
Q: Are these units really brand new, or are they refurbished/repaired parts?
A: This product is a Brand New Surplus unit. It is not used, not pulled from a decommissioned plant, and not refurbished. All modules feature zero wear on terminal screws, zero internal contact degradation, and original anti-static packaging opened only for mandatory QC testing.
Q: Why is New Surplus priced higher than refurbished safety relays on the market?
A: Refurbished safety relays often have internal contact erosion or aged coils from millions of operations. Saving $50 on a used safety relay can cost tens of thousands in production loss or safety compliance violations if a contact welds shut. Our pricing reflects genuine, factory-fresh inventory that delivers full OEM operational life and zero failure risk.
Q: Can the Pilz 301120 handle automatic reset after an E-stop activation?
A: Yes. Wiring a jumper link across the appropriate control terminals enables automatic start. For manual start requirements, connect a normally open reset pushbutton across the feedback loop terminals.
Q: Does this safety relay support cross-circuit detection on safety inputs?
A: Yes. Dual-channel wiring utilizing terminals S11/S12 and S21/S22 allows the internal logic to detect short circuits across input channels and trigger an immediate safety shutdown.
Q: What warranty coverage applies to this unit?
A: Every Pilz 301120 New Surplus module comes backed by a comprehensive 1-year replacement warranty, fully verified through continuity checks, power-on self-tests, and ESD-safe packaging protocols.
