Interphase V/SCSI-2 4220 Cougar II Card
The Interphase V/SCSI-2 4220 Cougar II is a SCSI controller card. It supports V/SCSI-2 interfaces, providing high-speed data transfer rates for connecting SCSI devices to a computer system. The Cougar II Card enhances system performance by efficiently managing data flow between the host system and peripherals.
- Model
- Interphase 4220
- Calibration
- Available on request
- Price
- $750
- RFQ ref
- 4220
This unit
The Interphase V/SCSI-2 4220 Cougar II Card is a VMEbus-based SCSI controller that manages high-speed data transfer between host systems and multiple SCSI peripherals. It delivers performance through dual independent SCSI buses supporting simultaneous data streams and intelligent command queuing architecture.
Technical Specifications
Interface: V/SCSI-2
SCSI Device Support: Up to 14 SCSI-2 devices per primary channel (7 per bus); optional secondary channel adds 7 devices for maximum 21 total. Configurable as Wide controller supporting up to 15 Fast or Fast and Wide devices per channel
Host Interface: VMEbus
SCSI Connector Types: 50-pin Centronics (SCSI-1/2); 68-pin High-Density (Fast/Wide SCSI-2)
Architecture: MACSI (Multiple Active Command Software Interface) implemented in Short I/O
Command Processing: Work queue-based management with concurrent command execution and interleaving across queues
Data Streams: Two simultaneous independent data streams via dual SCSI buses
Key Features
Command queuing enables multiple active commands to execute concurrently, improving system responsiveness
Work queue architecture interleaves commands from all active queues to maximize SCSI bus utilization
Disconnect/Reconnect support permits overlapped activity on connected devices
Dual independent SCSI buses eliminate bus contention between simultaneous data streams
Real-time command completion status notification to host
Scalable device connectivity - support for 14 to 21 total devices depending on channel configuration
Typical Applications
storage subsystem control in VME-based systems
Multi-peripheral SCSI environments requiring sustained throughput
Environments requiring concurrent command execution across multiple SCSI devices
Systems leveraging Fast and Wide SCSI-2 device support
Compatibility & Integration The Cougar II integrates into VMEbus systems and supports standard SCSI-2 connector configurations. Dual-channel architecture allows independent control of separate SCSI device sets, enabling modular expansion without performance degradation.
Interphase 4220 — Repair & Calibration Service
Aumictech offers NIST-traceable calibration and repair for the Interphase 4220. All calibrations are performed to NIST-traceable standards and ship with a certificate. Turnaround is typically 1–3 business days after receipt.
Interphase 4220 price
This Interphase 4220 is listed at $750. Calibration is available separately from $450. Contact us for volume pricing or if you need multiple units.
Interphase 4220 calibration cost
NIST-traceable calibration for the Interphase 4220 is $450 (standard — pass/fail certificate and calibration sticker) or $650 (full measured data at every test point, reference standards documented, traceability chain included). Turnaround is 1 to 3 business days after receipt. See full calibration details →
