Omron G9SP-N20S — Safety Controller, 20 in / 8 out
SKU: G9SP-N20SUSD 185.00
G9SP standalone programmable safety controller, 20 in / 8 out, 24 VDC, PLe / SIL 3, function-block programming via G9SP Configurator.
1-Year Warranty
Full manufacturer warranty
Global Shipping
Worldwide delivery available
Genuine Omron
100% authentic product
Ready to Ship
Usually ships within 24h
In Stock
This item is available for immediate shipment from our warehouse.
Contact for pricing, bulk discounts, and shipping
Product Overview
The Omron G9SP-N20S is a standalone programmable safety controller for mid-size machines that need more than a hard-wired safety relay can deliver — typically several E-stop buttons, guard-door switches, safety light curtains, and mode-select switches wired through custom AND / OR / muting logic. It runs on 24 VDC, takes 20 safety inputs and provides 8 PNP safety transistor outputs plus 6 test outputs. Logic is configured with the G9SP Configurator software using certified function blocks — not a full PLC scan — so programming is closer to wiring a ladder of safety relays than to writing structured text.
Where the G9SP-N20S fits relative to other Omron safety devices
If the safety circuit is a single E-stop driving two contactors, a G9SA-301 (hard-wired safety relay, 3 NO + 1 NC, 45 mm wide) is the cheaper pick. If the circuit is several E-stops and two guard doors that all need to drop the same contactors, the G9SP-N20S is the right size — function blocks like AND, OR, Muting, EDM, and two-hand-control cover the common patterns without writing custom code. For very large systems or EtherCAT-based safety, step up to the NX-SL Safety CPU + NX-SOD400 / SOH200 I/O pair.
Inputs, outputs, and programming workflow
The 20 safety inputs are PNP and accept dual-channel wiring from the safety devices. The 8 safety transistor outputs are PNP sourcing — use them to drive contactor coils or the safety input of a variable frequency drive (VFD) that supports safety functions. The 6 test outputs are for pulse-testing the input wiring (short-circuit detection) and can also be used as standard outputs for non-safety signalling like 'reset required' lamps. Configuration is done in G9SP Configurator on a PC and transferred to the controller via the program cassette — once programmed, the controller runs without the PC.
Before ordering
Order a CP1W-CIF41 Ethernet option board if you need Ethernet / FINS/UDP monitoring or remote reset; the G9SP-N20S itself has no built-in Ethernet. Confirm the 24 VDC supply is in the 21.6 to 26.4 VDC range with enough current headroom for the 8 outputs. The unit mounts on a 35 mm DIN rail inside an IP54 enclosure per IEC 60529. Allow 20 mm clearance on each side for ventilation. For purely hard-wired circuits with no custom logic, a G9SA-301 or G9SB-200-B is more cost-effective than the G9SP.
Key Features
- G9SP standalone programmable safety controller
- 20 PNP safety inputs
- 8 PNP safety transistor outputs
- 6 test / pulse outputs (PNP open-collector)
- Programming via G9SP Configurator (function-block logic)
- Memory card slot for program transfer without a PC
- PLe per ISO 13849-1 / SIL 3 per IEC 61508 when configured
- Optional Ethernet (CP1W-CIF41 option board, FINS/UDP)
- DIN-rail mount (TH35-7.5 / TH35-15)
- 24 VDC supply; operating temperature 0 to +55 °C
- SKU: G9SP-N20S
- Series: G9SP standalone safety controller
- Voltage: 24 VDC
- I/O: 20 I/O
Best-Fit Applications
- Mid-size packaging machine with 4 E-stops, 3 guard doors, and a safety light curtain, all dropped by AND / OR logic
- Robotic work cell with two safety zones that share contactors but need independent reset behaviour
- Palletiser with muting logic that lets product pass through a light curtain without tripping
- Press with two-hand control and a guard door that needs separate mode-select paths for setup versus run
- Refit of a cabinet that previously used several G9SA relays, consolidated into a single G9SP-N20S function-block program
Buying Checklist
- Pick G9SP-N20S when you need custom logic (muting, mode select, EDM feedback) that a single G9SA / G9SE relay cannot express.
- Pick a G9SA-301 (45 mm hard-wired) for a single E-stop and three contactors — cheaper and simpler than a G9SP.
- Pick an NX-SL Safety CPU + NX-SOD400 output pair when the system needs EtherCAT safety or more than 20 I/O.
- Order a CP1W-CIF41 Ethernet option board if you need FINS/UDP monitoring or remote reset from a SCADA.
- Plan the program offline in G9SP Configurator before commissioning — function-block logic is faster to validate on a PC than on the machine.
Technical Specifications
| Model | G9SP-N20S |
|---|---|
| Series | G9SP standalone safety controller |
| Safety Inputs | 20 × PNP (dual-channel capable) |
| Safety Outputs | 8 × PNP transistor sourcing |
| Test / Pulse Outputs | 6 × PNP open-collector |
| Programming | G9SP Configurator (function-block library); memory-card cassette for transfer |
| Power Supply | 24 VDC (21.6 to 26.4 VDC) |
| Ethernet | Optional via CP1W-CIF41 board (FINS/UDP) |
| Safety Integrity | PLe / Cat 4 (ISO 13849-1); SIL 3 (IEC 61508) |
| Mounting | 35 mm DIN rail (TH35-7.5 or TH35-15 per IEC 60715) |
| Operating Temperature | 0 to +55 °C |
| Approvals | UL 508, CSA C22.2 No.142, EN 61131-2, TÜV (BG) |
Resources & Downloads
FAQ for G9SP-N20S
What is the difference between G9SP-N20S and a G9SA-301?
G9SA-301 is a hard-wired safety relay: 3 NO safety contacts + 1 NC aux, no programming needed. G9SP-N20S is a programmable controller with 20 inputs and 8 outputs that you wire through certified function blocks. Pick G9SA for a single E-stop / guard-door circuit. Pick G9SP when you need muting, mode switching, or interlocking between several zones that a hard-wired relay cannot handle.
Does the G9SP-N20S have built-in Ethernet?
No. The G9SP-N20S does not have built-in Ethernet. To add Ethernet for FINS/UDP monitoring or remote reset, mount a CP1W-CIF41 option board (ver. 2.2 or later). Without it, the controller runs as a standalone device and is monitored only via front-panel LEDs and the configuration software during commissioning.
What safety level does the G9SP-N20S reach?
Up to PLe per ISO 13849-1 and SIL 3 per IEC 61508, depending on how the I/O and outputs are wired. Dual-channel inputs and redundant outputs monitored by EDM feedback give the highest level; single-channel wiring caps at lower categories. The certified function blocks in G9SP Configurator enforce the supported configurations, so the safety integrity is maintained as long as the wiring and external wiring follow the manual.
Do I need to leave a PC connected at runtime?
No. Once the program is loaded from the memory card cassette, the G9SP-N20S runs on its own. The PC and G9SP Configurator are only needed for commissioning, diagnostics, and program updates. The memory card also lets you clone a verified program onto a replacement unit without a PC.
Similar Products
Explore related Omron models often viewed alongside this product.
