Overview
The WEIDMULLER RSSD 800391 is a compact electromechanical interface relay module designed to provide electrical isolation and power amplification between industrial controllers (PLCs/DCS) and field devices. It allows a low-voltage control signal (typically 24 VDC) to safely switch higher voltage or current loads while protecting sensitive control electronics from surges, back EMF, and transients. Its narrow 6.2 mm design and DIN rail mounting make it ideal for high-density control cabinets, ensuring reliable operation in space-constrained applications.
Technical Data
| Parameter | Specification |
|---|---|
| Model Number | RSSD 800391 |
| Component Type | Electromechanical Interface Relay Module |
Typical Applications
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High-Density Control Panels: Ideal for marshalling cabinets and terminal boxes requiring many I/O points in limited space.
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Solenoid and Contactor Control: Switches 120–230 VAC solenoids or motor contactors via 24 VDC PLC outputs.
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Safety Isolation: Provides galvanic isolation for safety interlocks, protecting control electronics from field faults.
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Signal Level Conversion: Safely converts control signals between different voltage levels within contact ratings.
The green LED indicates coil energization, enabling quick visual verification of relay status.
FAQ
Q1: How does the RSSD 800391's narrow width benefit control cabinet design?
A1: At just 6.2 mm wide, the module allows a higher density of I/O points on the DIN rail, saving space and reducing enclosure size in crowded control cabinets.
Q2: What protective feature is built into the coil circuit?
A2: An integrated free-wheeling diode safely dissipates high-voltage spikes (Back EMF) when the coil is de-energized, protecting PLC output transistors.
Q3: Can the RSSD 800391 switch both AC and DC loads?
A3: Yes. The relay contacts can switch AC loads up to 250 VAC and DC loads up to 125 VDC, with a maximum continuous current of 6 A. DC switching capacity is lower due to arc suppression limitations.
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|---|---|
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| Condition | 100% New with Original Package |
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| Shipping Port | ShangHai, Xiamen |
| Warranty | 12 Months |
| Q: Is Our Pricing Competitive? |
| A: Yes, we collaborate with over 50 countries worldwide. As a top supplier in China, we offer significant discounts based on market trends. |
| Q: What Is the Warranty Period? |
| A: All our new and original products come with a standard one-year warranty. |
| Q: What Payment Methods Do We Accept? |
| A: We require 100% T/T (Telegraphic Transfer) payment before shipping. For items with a lead time, a 30% deposit is needed upfront, and the remaining 70% is due before shipping. If you have a representative in China, you can arrange an RMB transfer through them. |
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| A: We primarily use FedEx, DHL, UPS, and BRE for shipping. If you have an account with any of these carriers, you can handle shipping directly. We also offer free shipping to China-based freight forwarders. |
| Q: What Is Our Delivery Time? |
| A: Delivery usually takes 1-3 days after receiving the initial payment. For items with a lead time, shipping will occur according to the specified schedule. |
| Q: How Do We Package the Goods? |
| A: We ensure safe packaging with multiple layers of protection. Products are first placed in their original boxes and sealed with labels. A layer of bubble wrap is then added for collision protection during transit. Finally, the items are packed securely in durable boxes. |
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