Allen-Bradley SDN2.5-20RED Redundancy Module
$123.00
$320.00
Description
Allen-Bradley SDN2.5-20RED Redundancy Module
Configured for redundant 24 VDC power distribution, the Allen-Bradley SDN2.5-20RED (SDN2.5-20RED Redundancy Module) decouples parallel power supply outputs for N+1 operation. The module provides a 20 A maximum current handling capacity, 0.6 VDC typical voltage drop, inverse battery protection, and DC OK monitoring. The documented catalog data identifies the unit as a SolaHD SDN Redundant Series component.
Hardware Specifications
| Parameter | Specification |
|---|---|
| Model | SDN2.5-20RED |
| Brand | Allen-Bradley / SolaHD |
| Series | SDN Redundant Series |
| Origin | Malaysia |
| Product Type | Redundancy Module |
| Nominal Input Voltage | 24 VDC |
| Maximum Rated Voltage | 35 VDC |
| Maximum Current Handling | 20 A |
| Typical Voltage Drop | 0.6 VDC |
| Redundancy Configuration | N+1 |
| Inverse Battery Protection | Yes |
| Connection | Captive screw terminals |
| Conductor Size | 16-10 AWG solid, 1.5-6 mm2 |
| Dimensions | 124 mm H x 50 mm W x 116 mm D |
| Weight | 625 g |
| Operating Temp | -10 to +60 deg C at full nominal load |
| Storage Temp | -25 to +85 deg C |
| Degree of Protection | IP20 |
| Mounting | TS35/7.5 or TS35/15 DIN rail |
| DC OK Contact | 1 output contact, N.O. and N.C. |
| DC OK Voltage Set Point | >18 VDC +/-5% |
| DC OK Contact Rating | 30 VDC @ 2 A / 250 VAC @ 2 A |
The module electrically decouples multiple identical SDN power supplies and supports N+1 redundant configurations. Its external redundancy path prevents a failed supply from overloading the remaining supply units.
DIN-Rail Power Redundancy and Isolation
The SDN2.5-20RED accepts 24 VDC supply inputs and provides a common redundant output path with a documented maximum current handling capacity of 20 A.
The typical input-to-output voltage drop is 0.6 VDC. Therefore, downstream equipment should be evaluated against the available DC voltage after the redundancy-module drop.
When used with compatible SDN power supplies, the power-supply front switches must be configured for parallel operation rather than single operation. The module incorporates DC OK relay contacts for output monitoring.
Frequently Asked Questions (FAQ)
Q: What is the maximum current handling capacity of the SDN2.5-20RED?
A: The specified maximum current handling capacity is 20 A.
Q: What voltage drop occurs across the redundancy module?
A: The documented typical voltage drop from input to output is 0.6 VDC.
Q: Does the module provide output-status monitoring?
A: Yes. The SDN2.5-20RED provides a DC OK output contact with N.O. and N.C. contacts. The documented set point is greater than 18 VDC +/-5%.
Field Installation Guidelines
Mount the unit by snapping it onto a compatible TS35/7.5 or TS35/15 DIN rail. Verify that the locking mechanism is fully engaged before wiring.
Connect compatible SDN power supplies to the designated redundancy inputs and maintain correct DC polarity throughout the circuit.
The supplied documentation specifies captive screw terminals and 16-10 AWG solid conductors, corresponding to 1.5-6 mm2.
Connect the GND terminal when using the voltage-monitoring function. The manufacturer documentation states that GND must be connected for voltage monitoring to operate correctly.
Keep DC power wiring separated from high-voltage switching, contactor, and motor conductors where practical. Route monitoring contacts separately from high-current conductors to reduce electrical interference.
The enclosure is rated IP20 and should therefore be protected from moisture and condensation during installation.
Features
Minimum Order Quantity (MOQ)
We welcome bulk orders and have a minimum order quantity of just one unit.
Certificates and Documentation
Upon request, we can provide all necessary documentation, including Certificates of Origin/Conformance and other required export documents.
Delivery Time
For items in stock, we aim to deliver within 1-3 days after payment confirmation. Items with specified lead times will be delivered according to the quoted schedule.
Payment Methods
We accept 100% T/T (Telegraphic Transfer) payment before shipping. For items with lead times, a 30% deposit is required upfront, with the remaining 70% due before shipment. For RMB transfers, please contact us if you have an agent in China.
Warranty
We offer a standard one-year warranty on all new and original items. If you require an extended warranty, please contact us for additional cost details.
Refund and Return Policy
Your satisfaction is important to us. If you need to return an item, it must be done within 30 days of the order date. The product must be unused, unopened, and in its original packaging with all accessories included. Refunds are processed within 5-7 business days after we receive the returned item. Please note that shipping and related charges are non-refundable.
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