Omron G9SA-501 AC-DC24V — 5 NO + 1 NC Safety Relay
SKU: G9SA-501 AC-DC24VUSD 95.00
G9SA-series safety relay, 5 NO safety contacts + 1 NC aux, 1 or 2 channels, manual or auto reset, AC/DC 24 V supply, DIN-rail.
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Product Overview
The Omron G9SA-501 AC-DC24V is the 5 NO + 1 NC safety relay in the G9SA compact family. It is manufactured by Omron Corporation. Hengyixin Automation stocks this relay in Xiamen and ships within 3-5 business days; safety-rated components ship with a batch-trace certificate.
30 ms or less operate, 10 ms or less release response G9SA-series compact safety relay, 22.5 mm DIN-rail body G9SA-series compact safety relay, 22.5 mm DIN-rail body 30 ms or less operate, 10 ms or less release response
G9SA-series compact safety relay, 22.5 mm DIN-rail body 30 ms or less operate, 10 ms or less release response
The safety category is set by the wiring, the input device, and the contactor monitoring -- not by the G9SA relay alone.
Key Features
- G9SA-series compact safety relay, 22.5 mm DIN-rail body
- 30 ms or less operate, 10 ms or less release response
- 5 A at 250 VAC / 30 VDC resistive contact rating per NO
- AC/DC 24 V universal supply (the AC100-240 suffix is the 100-240 V sibling)
- SKU: G9SA-501 AC-DC24V
- Series: G9SA-501
- Voltage: 24 V
Best-Fit Applications
- Two-hand control upgrade when the existing relay has more NO contacts than the new circuit needs
- Safety light curtain output switching two safety contactor coils on a packaging line
- E-stop circuit switching two contactor coils + one indicator on a small machine tool
Buying Checklist
- Pick G9SA-501 AC100-240 when the cabinet has 100-240 VAC supply (not AC/DC 24 V).
- Pick G9SA-301 AC-DC24 instead when the circuit only needs 3 NO + 1 NC -- the smaller 17.5 mm body saves DIN-rail space.
- Pick G9SA-501 AC-DC24V for a 5 NO + 1 NC safety relay on AC/DC 24 V supply in the G9SA 22.5 mm DIN-rail body.
Technical Specifications
| Contact Form | 5 NO safety contacts + 1 NC aux (5PST-NO + SPST-NC) |
|---|---|
| Contact Rating | 5 A at 250 VAC / 30 VDC resistive |
| Input Channels | 1 or 2 channels, DIP-switchable |
| Reset Mode | Manual or auto reset, DIP-switchable |
| Supply Voltage | AC/DC 24 V universal |
| Operate / Release | 30 ms or less / 10 ms or less |
| Mechanical Life | 5,000,000 operations minimum |
| Electrical Life | 100,000 operations minimum at 1,800 ops/hour |
| Indicators | Green PWR LED + red ERR LED on the front face |
| Terminals | M3.5 screw, 0.98 N·m torque |
| Dimensions / Mounting | 45 W x 111 H x 94 D mm, DIN-rail, ~270 g |
| Operating Temperature | -25 to +55 C, 35-85 % RH |
FAQ for G9SA-501 AC-DC24V
What is the difference between G9SA-501 and G9SA-301?
Contact count. The G9SA-501 is 5 NO + 1 NC in a 22.5 mm body. The G9SA-301 is 3 NO + 1 NC in a 17.5 mm body. The supply, response time, mechanical life, and approval list are identical. Pick the 501 when the circuit switches three or four contactor coils or indicator lamps; pick the 301 when the circuit only switches one or two contactor coils. For more than 5 NO, add a G9SA-EX301 expansion (3 NO + 1 NC) to the 301 or 501.
Does the G9SA-501 AC-DC24V reach Cat 4 / PL e by itself?
No. The safety category is set by the wiring, the input device, and the contactor monitoring -- not by the relay. For Cat 4 / PL e you need: (1) the G9SA set to 2-channel input, (2) an e-stop or guard switch with certified direct opening (D4NS / D4NL / D4SL), (3) two contactor coils each with a NC mirror contact fed back to the G9SA, and (4) manual reset. With single-channel wiring or single-contact input devices, the achievable category drops to Cat 1 / PL c at most.
What is the difference between AC/DC24 and AC100-240 supply?
Supply range. The AC/DC24 suffix accepts 24 VAC or 24 VDC on the same two terminals -- the common pick for a 24 VDC control cabinet. The AC100-240 suffix accepts 100-240 VAC on the same terminals -- the common pick for an AC control cabinet. The contact form, response time, and approvals are identical. Pick the AC/DC24 for a 24 VDC cabinet; pick the AC100-240 for a 100-240 VAC cabinet.
Does the G9SA-501 need a separate reset button?
Only when the DIP switch is set to manual reset. In manual reset mode, the relay waits for a momentary NO pushbutton between the reset terminal and 24 V before re-closing the safety contacts after the safety input re-closes. In auto reset mode, the relay re-closes as soon as the safety input re-closes. Manual reset is required for most Cat 3 / PL d and Cat 4 / PL e installations because it forces the operator to verify that the danger zone is clear before re-energising the machine.
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