ZB4-BS844
Hoạt độngHarmony XB4 Red Mushroom Emergency Stop (Push-Pull)
Red 40mm mushroom head emergency stop push button, push-pull reset, for Schneider Harmony XB4 series. 22mm cutout, IP66.
Ứng Dụng Phổ Biến
Emergency stop button found on CNC machines, hydraulic presses, industrial robots, and food processing lines. The 40mm mushroom head meets EN/ISO 13850 requirements — large enough to hit with a palm or forearm in a panic. Twist-to-release prevents accidental restart after an emergency — the operator must deliberately acknowledge the event before the machine can run again. Required by OSHA and EU Machinery Directive on any equipment with moving parts that could injure an operator.
Thường Được Tìm Thấy Trên
Thông số kỹ thuật
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Actuator Type
The button head style. Flush sits level with the bezel (prevents accidental presses). Extended protrudes for easy access.
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Mushroom Head
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Certifications
Third-party safety certifications. UL = required for US NEC installations. CE = EU compliance. CSA = Canadian standards.
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UL, CSA, CE, IEC 60947-5-5
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Color
Button/actuator color. Green = start/go, Red = stop/emergency, Yellow = caution, Blue = reset (per IEC 60204-1).
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Red
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Contact Configuration
Normally Closed — circuit is on until you press. Standard for stop/emergency functions. Wire in series with safety circuits.
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1NC (with ZB4-BZ102)
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Cutout Diameter
The hole size you drill in your panel to mount this button. 22mm is the most common industrial standard worldwide.
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22mm
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Head diameter
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40mm
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IP Rating
IP66: Dust-tight and withstands powerful water jets from any direction. Standard for outdoor and washdown applications.
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IP66
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Material
The bezel/body material. Metal bezels are more durable in harsh environments. Plastic is lighter and cheaper.
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Metal
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Mounting Type
How the button attaches to the panel. Panel mount is standard — installs through a cutout from the front.
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Panel
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Reset type
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Push-Pull
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Thông số kỹ thuật có biểu tượng này được liên kết đến trang nguồn gốc của nhà sản xuất
Bạn Cũng Cần
Đây là một thành phần mô-đun. Để lắp ráp hoàn chỉnh, bạn có thể cần thêm:
Các Lựa Chọn Tương Thích
Các sản phẩm này là các tham chiếu chéo tương đương về chức năng từ các nhà sản xuất khác.
Hướng Dẫn Cài Đặt Nhanh
Panel cutout: 22mm. Mount with the yellow backing plate visible (required by EN/ISO 13850).
Wiring: Wire NC contacts in series with the safety relay input channels. Use dual-channel wiring for SIL 3 / PLe applications. Never wire directly to a motor contactor.
Testing: Press the e-stop and verify the machine stops within the required time. Test the reset mechanism. Repeat monthly per EN/ISO 13850.
Kích thước
Sơ đồ đấu dây
Khắc phục sự cố
E-stop won't reset (twist/pull doesn't release)
Check for debris in the mechanism. For twist-release: turn clockwise 45-90 degrees. For push-pull: pull straight out firmly. If the mechanism is stuck, the internal latch may be damaged — replace the entire head assembly.
Machine doesn't stop when e-stop is pressed
Critical safety issue. Immediately lock out the machine. Check wiring — NC contacts must be in series with the safety relay. Verify the safety relay is functioning. A broken wire in an NC circuit should cause a stop, so check for a wiring bypass.
Safety relay faults after e-stop reset
The safety relay detects a cross-fault between the two monitoring channels. Check that both NC contacts on the e-stop are switching simultaneously. One contact may be welded closed — replace the contact block.
Nơi Mua Hàng
Dải giá
$4.56 — $68.61
từ 4 nhà phân phối
Thông số kỹ thuật nhanh
- Actuator Type
- Mushroom Head
- Certifications
- UL, CSA, CE, IEC 60947-5-5
- Color
- Red
- Contact Configuration
- 1NC (with ZB4-BZ102)
- Cutout Diameter
- 22mm
Những Đánh Giá Từ Khách Hàng
“Always use NC contacts, always wire through a safety relay, always test monthly. The Schneider ZB4-BS844 twist-release is my go-to — the trigger guard prevents accidental activation. Never wire an e-stop directly to a contactor.”
Tìm Hiểu Thêm
Nguồn Dữ Liệu
Thông số kỹ thuật và dữ liệu sản phẩm được trích dẫn từ các tài liệu tham khảo sau.
ZB4BS844 Schneider Product Page
https://www.se.com/us/en/product/ZB4BS844/
Truy cập ngày March 30, 2026
