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Beckhoff Module EL2904
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Specifications
| Category/version | TwinSAFE |
| Type/signal | standard digital |
| Channels | 4 |
| Value range (digital/encoder) | 24 V |
| Output current | 0.5 A |
| Nominal voltage | - |
| Communication | EtherCAT |
| Technologies/ Highlights | - |
| Approvals | Functional safety, Explosion protection |
| PLC integrated | - |
| Input/output specification (digital) | positive switching, ground switching |
| eXtreme Fast Control | - |
| Feedback (compact drive technology) | - |
| Wiring | 1-wire, 2-wire |
| Connection method (signal) | spring-loaded technique |
| Connection method (bus interface) | - |
| Product status | Regular delivery |
| Explosion protection | not intrinsically safe, ATEX Zone 2 (gas) |
| Safety technology/ functions | TwinSAFE |
| Safety Architecture | Decentral |
| Safety Integrity Level (SIL) | 2, 3 |
| Performance Level (PL) | c, d, e |
Why Global Buyers Choose O&Kmarts
- Access to a wide range of SKUs across multiple brands and series
- One RFQ connects you to 5,000+ global supplier quotes
- Better availability for urgent and hard-to-find parts
- Faster global delivery via FedEx / DHL / UPS
- Easier access to rare and high-value models
- Flexible sourcing for individual parts or complete solutions
- Lower MOQs and more adaptable buying options
- Multi-brand procurement in one order
- OEM replacement and alternative model solutions available
- Fewer intermediaries, ensuring more competitive pricing
Why Global Buyers Choose O&Kmarts
- Limited to fast-moving SKUs only
- Limited local market availability
- Inventory frequently fails to meet urgent demand
- Long replenishment cycles, often taking weeks
- Rarely stock high-value compressors (e.g. Copeland YHV119)
- Frequently require bundled purchases
- Rigid and difficult MOQ negotiations
- Limited brand selection
- Minimal or no customization capability
- Higher local distribution and markup costs
Top Questions from OKmarts Buyers
Q: What express logistics options are available for urgent "Factory-Down" emergency repairs?
A: We partner with premier global express couriers, including DHL, FedEx, and UPS, to provide expedited international air freight. Urgent orders are processed with priority handling at our warehouses to ensure the shortest possible transit time to your facility.
Q: How can a first-time international buyer verify that OKmarts is a legitimate entity and not a fraudulent website?
A: OKmarts operates under a legally registered corporate entity with verifiable business registration records, global tax compliance IDs, and physical warehouse infrastructure. We can provide corporate bank references, Dunn & Bradstreet (D-U-N-S) numbers, and customer references from established industrial firms in your region to validate our commercial legitimacy before you transfer funds.
Q: Does OKmarts support third-party escrow services or buyer protection payment channels?
A: Yes. For buyers seeking maximum transaction security outside traditional corporate bank wires, we support payments through verified platforms like PayPal and credit card networks that offer robust buyer dispute resolution and chargeback protection frameworks in case of fulfillment default.
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Q&A
Q: What should I do if I receive the wrong item?
A: If you receive the wrong item, please contact our customer service team immediately. Provide them with the order details and a description of the incorrect item received. We will rectify the issue by arranging for a return and sending you the correct item.
Q: Can I change the shipping address after placing an order?
A: We understand that sometimes you may need to change the shipping address. Please contact our customer service as soon as possible, and we will do our best to accommodate your request, depending on the order status and feasibility.
Q: Are there any restrictions on international shipping?
A: International shipping may be subject to restrictions based on customs regulations and import/export laws of the destination country. It's recommended to review the specific restrictions and requirements for international shipping to your country before placing an order.









