Potter & Brumfield SDAS-01 (7Y2S1024) – Incremental Encoder for Servo Feedback and Positioning

The SDAS-01 7Y2S1024 appears to be an incremental rotary encoder variant configured for 1024 pulses per revolution, ideal for closed-loop speed and position feedback on servo axes, indexing tables, and light-duty conveyors. One thing I appreciate is how the 1024 PPR setting strikes a good balance—smooth low-speed control without overloading the PLC high‑speed counter. In many cases it fits neatly into upgrades where existing controllers expect A/B/Z quadrature with RS‑422 line-driver signals.

Order Placement Process and Guarantees

• Warranty: 365 days
• Delivery: 1 week for in‑stock items, no more than one month at the latest
• Payment: 50% advance payment; full payment before delivery
• Express options: FedEx, UPS, DHL

Key Features

• 1024 PPR resolution – Typically suitable for precise positioning while keeping controller counts manageable.
• Quadrature A/B with index (Z) – Directional counting and homing are straightforward on most PLC high‑speed inputs.
• RS‑422 differential outputs – Noise‑immune transmission over longer runs in industrial panels.
• 5 VDC line-driver supply – Common with motion controllers and servo drives that expect TTL-level encoders.
• Compact industrial form factor – Fits typical flange/coupling mount layouts; easy swap for many legacy encoders.
• Compatible with standard accessories – Works with flexible couplings, shielded encoder cables, and high‑speed counter modules.

Technical Specifications

Application Fields

From my experience, the SDAS-01 7Y2S1024 fits well on:

• Servo axes on small CNC machines and pick‑and‑place lines
• Packaging machinery for registration marks and web tension feedback
• Conveyor speed monitoring and position tracking
• Indexing tables and rotary actuators needing homing via Z‑pulse
• Retrofit projects replacing legacy 1024 PPR encoders on PLC counters

Advantages & Value

• Compatibility – RS‑422 differential outputs match most servo drives and PLC high‑speed modules without extra converters.
• Balanced resolution – 1024 PPR is commonly supported, reducing programming changes in upgrades.
• Noise immunity – Differential signaling helps in cabinets with VFDs and high EMI loads.
• Supply chain flexibility – OEM‑grade build with standard mounting makes replacements faster and, typically, more cost‑effective.
• Support components – We can match shielded encoder cables, M12 pigtails, and flexible couplings to your shaft size to shorten commissioning time.

Installation & Maintenance

• Mounting – Use a proper flange or clamp mount; align the encoder shaft carefully and use a flexible coupling to avoid bearing stress.
• Wiring – Shielded twisted pairs for A/ A̅, B/ B̅, Z/ Z̅. Tie shield to panel ground at one end only to reduce ground loops.
• Power – Provide a clean 5 VDC supply; avoid sharing with noisy loads. In most cases a dedicated encoder power rail improves stability.
• Environmental – Install in a dry, ventilated cabinet. Keep away from high‑voltage busbars and VFD output cables.
• Safety – Power down before connecting/disconnecting. Observe ESD precautions for the line‑driver electronics.
• Routine checks – Inspect coupling set screws, clean the shaft area, and verify A/B phase alignment and Z‑index once per maintenance cycle. Firmware updates aren’t applicable to passive encoders, but controller scaling should be re‑verified after replacements.

Quality & Certifications

• Compliance typically available: CE, RoHS; production under ISO 9001 quality systems
• Manufacturer’s warranty: 12 months (365 days)
• Each unit can be function‑tested on A/B/Z channels with certificate on request

You might notice that many retrofit customers ask for the same 1024 PPR/RS‑422 combination—usually because their motion cards already expect it. If you can share shaft size, mounting style (flange/clamp), and cable exit preference, we’ll match the right coupling and cable so installation goes smoothly the first time.