Omron G9SB-200-B AC-DC24V — Safety Device
SKU: G9SB-200-B AC-DC24VUSD 112.00
Ultra-slim 17.5 mm safety relay unit, 24 VAC/VDC supply, 2 DPST-NO safety contacts rated 6 A, +common input, auto-reset, up to PLe per ISO 13849-1 / SIL3 per IEC 61508.
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 G9SB-200-B AC-DC24V is the 17.5 mm-wide ultra-slim safety relay unit in Omron's G9SB family, used as the safety output stage in a Category 4 / PL e per ISO 13849-1 emergency-stop, guard-door, or light-curtain circuit. It takes a 24 VAC or 24 VDC supply on terminals A1 / A2, monitors one or two input channels from safety devices (E-stop pushbuttons, interlock switches, safety mats, light curtains), and switches its two DPST-NO safety contact sets simultaneously when the safety condition is met.
How the G9SB compares to the G9SE and G9SA
Within Omron's safety-relay lineup, the G9SB series is the 17.5 mm ultra-slim option with front-side screw terminals, the G9SE is the 17.5 mm push-in terminal option with integrated diagnostic LEDs (more expensive but faster to wire), and the G9SA is the 22.5 mm three-pole option with auxiliary monitoring contacts. Pick the G9SB-200-B for the most common case — a single E-stop or guard-door circuit that needs two NO safety contacts and uses a +common input device. If you need three safety contacts (DPST-NO + SPST-NC), pick the G9SB-3010 instead.
Wiring and application context
In a typical Cat 4 / PL e guard-door circuit, the safety door switch feeds both input channels of the G9SB; the two NO safety contacts then drive the contactor coils or the safe-stop input of an NX safety controller. Auto-reset means the relay picks up immediately when both inputs close, which is correct for guard-door monitoring — the door must be closed before the machine can restart, and the relay re-engages as soon as the door closes. For emergency-stop circuits, add a manual-reset variant (G9SB-200-D) so the operator must explicitly reset the safety chain after an E-stop, preventing automatic restart on release.
Diagnostics and lifespan
The G9SB-200-B has front-panel LEDs for power (PWR) and channel status (CH1, CH2), so a quick visual inspection shows whether both inputs are closed. Electrical life is 100,000 operations minimum at full rated load (6 A at 250 VAC / 30 VDC), mechanical life is 5 million operations minimum. Mounting is on a standard 35 mm DIN rail, and the 17.5 mm width means you can pack two or three G9SB relays side-by-side in a 52.5 mm panel space. Operating temperature is -25 to +55 °C, so the relay sits in the same cabinet as the contactors and PLCs.
Key Features
- Ultra-slim 17.5 mm DIN-rail housing, 100 mm tall
- 2 safety contacts, no auxiliary contact
- 24 VAC / 24 VDC supply, ~2.9 VA / 1.4 W power consumption
- +Common input mode, auto-reset on safety condition cleared
- Force-guided contact construction per EN 61810-3
- Up to PLe per ISO 13849-1 / SIL3 per IEC 61508 / Cat 4 per EN 954-1
- Operating time 30 ms, response time 10 ms
- Contact rating 6 A at 250 VAC / 30 VDC resistive
- SKU: G9SB-200-B AC-DC24V
- Series: G9SB
- Voltage: 24 VAC
- I/O: 25 I/O
Best-Fit Applications
- Emergency-stop monitoring on a packaging line with two safety contactors downstream
- Guard-door interlock on a robotic cell where door opening drops power to the robot
- Two-hand control monitoring on a small forming press
- Light-curtain monitoring on an assembly line where breach cuts power to the drive
Buying Checklist
- Pick G9SB-200-B for two safety contacts, +common input, auto-reset
- Pick G9SB-200-D for two safety contacts, +common input, manual-reset
- Pick G9SB-200-C for two safety contacts, inverse input, manual-reset
- Pick G9SB-3010 for three safety contacts with diagnostic SPST-NC
- Pick G9SE-201 if you want push-in terminals and integrated diagnostic LEDs
- Pick G9SA-301 if you need auxiliary feedback contacts and 22.5 mm width
Technical Specifications
| Model | G9SB-200-B AC-DC24V |
|---|---|
| Series | G9SB |
| Type | Ultra-slim safety relay unit |
| Width | 17.5 mm |
| Safety Contacts | 2 × DPST-NO |
| Auxiliary Contacts | None |
| Power Supply | 24 VAC (50/60 Hz) or 24 VDC |
| Operating Voltage Range | 85% to 110% of rated |
| Input Current | 25 mA max per channel |
| Input Channels | 1 or 2 channels (+ common) |
| Mounting | 35 mm DIN rail |
| Operating Temperature | -25 to +55 °C |
| Dimensions (W×H×D) | 17.5 × 100 × 112 mm |
Resources & Downloads
FAQ for G9SB-200-B AC-DC24V
What is the difference between G9SB-200-B and G9SB-200-D?
Both are 17.5 mm 2-pole DPST-NO safety relays with 24 VAC/VDC supply. The -B is auto-reset (the relay picks up immediately when both inputs close) and is correct for guard-door monitoring. The -D is manual-reset (the relay only picks up after a reset button is pressed even after both inputs close) and is correct for emergency-stop circuits where automatic restart could be hazardous. The reset button is wired to terminals Y1 / Y2 on the -D variant.
What safety category does the G9SB-200-B achieve?
Up to Category 4 per EN 954-1, Performance Level e per ISO 13849-1, and SIL 3 per IEC 61508, provided the surrounding circuit is wired correctly with two independent channels feeding the inputs and the two safety contacts driving two independent contactors or valves. The force-guided contact construction (EN 61810-3) is what makes the high rating possible — if one contact welds closed, the other cannot close, and the diagnostic circuit detects the fault.
How do I wire the input channels?
In +common mode (B suffix), both input channels share a common terminal T12. Wire one input device (typically an E-stop or interlock switch) across terminals T11 and T12, and either a second device across T21 and T12 or a jumper across T21 and T22 for single-channel operation. For two-channel monitoring of one E-stop with two contacts, wire each E-stop contact to its own channel (T11-T12 and T21-T22) with the common grounded at one end.
Does the G9SB-200-B need a manual reset?
No — the B suffix indicates auto-reset. The relay picks up its safety contacts as soon as both input channels are closed. For emergency-stop circuits you typically want manual reset so the operator has to press a reset button before the machine can restart after an E-stop event; in that case, pick the G9SB-200-D (manual reset, +common input). For guard-door monitoring where automatic reset on door closing is appropriate, the -B is correct.
Similar Products
Explore related Omron models often viewed alongside this product.
