Part of the Omron Safety Relays series — see the full model table, lifecycle status and replacement parts.
Omron G7SA-2A2B DC24 — Safety Device
SKU: G7SA-2A2B DC24USD 6.00
Slim 4-pole forcibly-guided safety relay, 2 NO + 2 NC contact configuration rated 6 A at 240 VAC, 24 VDC coil 20.8 mA
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Product Overview
The Omron G7SA-2A2B DC24 is a 4-pole forcibly-guided safety relay in the G7SA slim PCB-mount family, with a 2 NO + 2 NC (DPST-NO + DPST-NC) contact configuration rated 6 A at 240 VAC or 6 A at 30 VDC per pole. 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. The forcibly-guided contact structure (per EN 61810-3) means the NO and NC contacts are mechanically linked so that if one contact welds closed due to overcurrent or end-of-life, the opposite contact cannot close on its own — a critical feature that makes the G7SA suitable for use in Cat 4 / PL e per ISO 13849-1 and SIL 3 per IEC 61508 safety functions. The G7SA family is Omron's slim PCB-mount safety relay series, with 4-pole and 6-pole variants: G7SA-2A2B (2 NO + 2 NC, 4 poles, this SKU), G7SA-3A1B (3 NO + 1 NC, 4 poles), G7SA-4A2B (4 NO + 2 NC, 6 poles), G7SA-5A1B (5 NO + 1 NC, 6 poles), and G7SA-3A3B (3 NO + 3.
Key Features
- 4,000 VAC dielectric strength coil-to-contact for 1 min
- 24 VDC coil, 20.8 mA, 500 mW power consumption
- Operating time 30 ms max, response time 10 ms max
- 6 A at 240 VAC / 6 A at 30 VDC rated contact
- SKU: G7SA-2A2B DC24
- Series: G7SA (Forcibly-Guided Safety Relay)
- Voltage: 24 VDC
Best-Fit Applications
- Light-curtain monitoring with redundant outputs and a diagnostic NC for EDM
- Forcibly-guided safety relay in a guard-door interlock with EDM feedback to safety controller
- Two-channel safety output stage in a Cat 4 / PL e E-stop circuit driving two contactors
Buying Checklist
- Pick G7SA-2A2B DC12 if your safety controller outputs 12 VDC instead of 24 VDC
- Pick G7SA-2A2B DC24 for 2 NO + 2 NC forcibly-guided safety relay with 24 VDC coil
- Pick G7SA-3A1B for 3 NO + 1 NC, G7SA-4A2B for 4 NO + 2 NC, G7SA-5A1B for 5 NO + 1 NC
Technical Specifications
| Model | G7SA-2A2B DC24 |
|---|---|
| Series | G7SA (Forcibly-Guided Safety Relay) |
| Type | Slim PCB-mount safety relay |
| Contact Configuration | DPST-NO + DPST-NC (2 NO + 2 NC) |
| Poles | 4 poles |
| Rated Load (Resistive) | 6 A at 240 VAC / 6 A at 30 VDC |
| Rated Load (Inductive) | 2 A at 240 VAC (cosφ=0.4) |
| Rated Load (DC Inductive L/R=7ms) | 1 A at 30 VDC |
| Coil Rated Voltage | 24 VDC |
| Coil Current | 20.8 mA |
| Must-Operate Voltage | 70 % of rated (16.8 VDC min) |
| Must-Release Voltage | 15 % of rated (3.6 VDC min) |
| Terminal Type | PCB through-hole |
| Mounting Option | PCB or P7SA-14F-ND-PU DC24 socket |
| Operating Temperature | -25 to +70 °C |
FAQ for G7SA-2A2B DC24
What does forcibly-guided contact mean?
Forcibly-guided contacts (per EN 61810-3) are mechanically linked so that if one contact welds closed due to overcurrent or end-of-life, the opposite contact cannot close on its own. This is a critical safety feature — a normal relay with both NO and NC contacts could have a welded NO contact while the NC contact continues to operate, falsely indicating that the NO has dropped out when it has not.
What is the difference between G7SA-2A2B and G7SA-3A1B?
Both are 4-pole forcibly-guided safety relays. The 2A2B has 2 NO + 2 NC contacts (the most common configuration for dual-channel output with EDM feedback). The 3A1B has 3 NO + 1 NC — more safety outputs but only one diagnostic NC. Pick 2A2B for typical Cat 4 dual-channel output with EDM; pick 3A1B if you need three independent safety outputs and one diagnostic.
What socket should I use for the G7SA-2A2B?
Use the P7SA-14F-ND-PU DC24 socket (Push-In Plus screwless terminals) or the P7SA-14F-ND DC24 socket (Phillips screw terminals). Both accept the G7SA-2A2B relay module and provide DIN-rail mounting plus LED indicator. The -PU (Push-In Plus) variant reduces wiring time by about 60 % compared to the screw-terminal version.
What safety category does the G7SA-2A2B 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 NO contacts driving two independent contactors or valves. The force-guided contact construction is what makes the high rating possible — if one contact welds, the other cannot close, and the diagnostic circuit detects the fault.
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