Curtis Instruments 1268-5503 378275503 D.C. Motor Controller
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Curtis 1268‑5503 is a high‑current (36–48 V, 500 A) separately excited DC motor speed controller that uses a full‑bridge field winding stage and a half‑bridge armature MOSFET section for solid‑state reversing and regenerative braking. Common failure points in this model include burnt or tripped MOSFETs, degraded gate driver ICs, overheating of the power stage due to inadequate cooling or overcurrent, and loss of communication with the programming device. First‑check steps: verify input voltage and polarity on the 36–48 V supply, inspect the MOSFET array for visible damage or excessive heat, and review any stored error codes via the controller’s serial/debug interface.[oss-gpt-20b] |
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We specialize in the repair and refurbishment of high-end industrial control electronics and power systems like this unit.
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🚑Shop Location🛠️
Industrial Electronic Repair
145 Rockwell Place Ct
Tobaccoville, NC 27050
🚑 Rush repair shipments only — no walk-ins.
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📦Mailing Address🚛
Industrial Electronic Repair
931-E S. Main St #204
Kernersville, NC 27284
📦 Mailing Address (for invoices or shipped repairs)
No walk-ins accepted.