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
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Product Overview
The Omron 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. manufactured by Omron Corporation. Hengyixin Automation stocks this safety device in Xiamen and ships within 3-5 business days; safety-rated components ship with a batch-trace certificate.
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. 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.
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
- Operating time 30 ms, response time 10 ms
- Contact rating 6 A at 250 VAC / 30 VDC resistive
- 24 VAC / 24 VDC supply, ~2.9 VA / 1.4 W power consumption
- SKU: G9SB-200-B AC-DC24V
- Series: G9SB
- Voltage: 24 VAC
Best-Fit Applications
- Light-curtain monitoring on an assembly line where breach cuts power to the drive
- 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
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
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 x H x D) | 17.5 × 100 × 112 mm |
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.
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