Technical Specifications:
Series: PACSystems RX7i / RX3i
Encoder Interface: SSI (Synchronous Serial Interface) and BiSS (Bidirectional Serial Synchronous)
Number of Channels: 2 Independent Encoder Channels (Channel A and Channel B)
Resolution Support: Up to 28 bits (268,435,456 counts per revolution)
Clock Frequency: Up to 10 MHz (BiSS), Up to 4 MHz (SSI)
Data Format: Gray Code or Binary Code (configurable)
Update Rate: Up to 100 kHz (10 μs per update)
Isolation: 1500V DC encoder-to-logic
Backplane Bus: RX7i / RX3i Backplane Bus (PCI/PMC based)
Power Consumption: < 2.5 Watts
Operating Temperature: 0°C to +55°C
Protection Rating: IP20 (rack mount)
Functional Features:
Dual Channel: Reads two independent absolute encoders simultaneously (e.g., two motor axes).
SSI + BiSS Support: Compatible with both SSI and BiSS encoder protocols, providing flexibility in encoder selection.
28-Bit Resolution: Supports encoders with up to 28-bit resolution for ultra-high precision positioning.
Gray Code Support: Natively supports Gray code output, eliminating position errors during bit transitions.
Diagnostic LEDs: Per-channel LEDs indicate encoder signal presence, clock signal, and data validity.
Hardware Timestamping: Captures encoder position with hardware-level timestamping for jitter-free motion control.
Configurable via Software: All parameters (resolution, data format, clock polarity) set in the Proficy Machine Edition software.
Performance Parameters:
Position Accuracy: ±1 count (at 28-bit resolution, this is sub-nanometer level)
Jitter: < 100 ns
MTBF: > 150,000 hours
ESD Protection: ±8kV contact, ±15kV air
Common Mode Rejection: > 80 dB
Material Composition:
Housing: Aluminum alloy with anodized finish, EMI shielding
PCB: 8-layer FR-4 High Tg board, gold-plated edge connector
Isolation: Digital isolators (Si86xx series) + isolated DC-DC converters
Connectors: High-density D-Sub or M12 connectors (depending on variant) for encoder connections
LEDs: High-brightness LEDs, red/green/amber
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