0-52002-3
Description
1. Product Model
2. Brand
3. Product Category
4. Alias
Official：S‑2 Relay Board
Common：Drive Relay Control Card, System Interface Relay PCB, S‑2 Drive Auxiliary Relay Module, DC Drive I/O Relay Board
5. Basic Information
Manufacturer：Reliance Electric, USA
Structure：19” rack‑mount plug‑in card, long‑edge backplane connector, enhanced front‑mounted relay bank
Status：Obsolete / Discontinued（legacy maintenance spare part for S‑2 drives）
Weight：Approx. 4 lb（1.8 kg）
Dimensions：Approx. 4” × 5”（102 mm × 127 mm）
Features：Upgraded power relays, heavy‑duty fuse protection, high‑visibility LED status indicators, reinforced terminal blocks, advanced surge suppression, improved EMC shielding
Revision Note：‑3 denotes third‑generation upgrade vs. 0-52002‑1：higher relay contact rating, better noise immunity, extended temperature range, and more robust fault handling
6. Function & Positioning
Core Function：Enhanced relay‑based I/O interface and auxiliary control for Reliance S‑2 series industrial DC drives；routes +24 VDC control signals to external relays, contactors, and interlocks；provides high‑capacity fault relay outputs（overvoltage/overcurrent/overtemperature）and status relay outputs（drive ready, run, fault）；isolates high‑power control circuits from low‑voltage logic；enables external emergency stop, interlock, and remote control functions with higher current handling and better reliability.
Positioning：High‑performance I/O relay hub for S‑2 DC drive systems；works with 0-52001 (main control board)、0-51901‑A (armature regulator)、0-51902‑5A (speed feedback)、0-51903‑A (auxiliary power) to form a complete high‑performance DC speed control system.
7. Core Performance Parameters
Input：+24 VDC (control) from auxiliary power board, 115/230 VAC (relay coils)
Relay Ratings（Upgraded vs. 0-52002‑1）：
Contact Rating：8 A @ 250 VAC / 30 VDC（vs. 5 A for ‑1）
Coil Voltage：24 VDC / 115 VAC（jumper selectable）
Isolation：2500 Vrms between logic and relay circuits
Operating Temp：0°C ~ +60°C（extended vs. 0-52002‑1）
Storage Temp：-40°C ~ +85°C
Protections：Input fuses, relay coil suppression, contact arc suppression, transient voltage protection, EMC shielding
8. General Matching Accessories
Main control board：0-52001
Armature regulator board：0-51901‑A
Speed feedback board：0-51902‑5A
Auxiliary power supply board：0-51903‑A
Field controller board, shielded I/O cables, rack mounting hardware, external interlock relays
9. Applicable Equipment & Industry
Equipment：Reliance S‑2 series industrial DC drives, Minipak/MaxPak/PRL series DC drive systems, heavy‑duty spindle drives, coil winders, industrial cranes, high‑current I/O applications
Industries：Metallurgical rolling mills, papermaking machines, mining conveyors, heavy machine tools, textile lines, printing presses, industrial constant‑torque speed regulation systems, material handling equipment
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