P T 2 3 8 R PTI NO MORE PRODUCED Native| Translation ------+-----+-----+----- Form 3.5"/HH Cylinders 615| | | Capacity form/unform 33/ 38 MB Heads 4| | | Seek time / track 35.0/12.0 ms Sector/track 26| | | Controller RLL / ST412 Precompensation 65535 Cache/Buffer KB Landing Zone 614 Data transfer rate 0.938 MB/S int Bytes/Sector 512 0.938 MB/S ext Recording method RLL 2/7 operating | non-operating -------------+-------------- Supply voltage 5/12 V Temperature *C 5 50 | -40 60 Power: sleep W Humidity % 8 80 | 5 95 standby 5.0 W Altitude km -0.457 3.000| -0.610 12.000 idle W Shock g 3 | 80 seek W Rotation RPM 3517 read/write 6.5 W Acoustic dBA 45 spin-up W ECC Bit MTBF h 25000 Warranty Month Lift/Lock/Park YES Certificates CSA,TUV,VDE ********************************************************************** L A Y O U T ********************************************************************** PTI PT225/PT338/PT238R/PT357R OEM MANUAL +---------------------------------------------------------+/ J4 | +-J5----+ +-+ |XX | +-------+ J10 | |XX | Resistor| | |XX | +J9--+ | | |XX | +----+ +-+ |XX | +-+ |XX | J6 | |XX | | | |XX J1 | | | |XX | +-+ | | |XX | |XX J2 | +-J7-----+ |XX | +--------+ |XX | +-J8-----+ |XX | +--------+ |XX XXJ3 | XX +---------------------------------------------------------+ Power ********************************************************************** J U M P E R S ********************************************************************** PTI PT225/PT338/OT238R/PT357R OEM MANUAL Jumper setting -------------- x = Jumpers are set at factory J1 Control Signals ------------------- +----------+---------+---------------+------------+ |Ground Re-| Signal | Function | Direction | |turn Pin | Pin | | | +----------+---------+---------------+------------+ | 1 | 2 | (Reserved) | Input | +----------+---------+---------------+------------+ | 3 | 4 | Head Select 2 | Input | +----------+---------+---------------+------------+ | 5 | 6 | Write Gate | Input | +----------+---------+---------------+------------+ | 7 | 8 | Seek Complete | Output | +----------+---------+---------------+------------+ | 9 | 10 | Track | Output | +----------+---------+---------------+------------+ | 11 | 12 | Write Fault | Output | +----------+---------+---------------+------------+ | 13 | 14 | Head Select 2*| Input | +----------+---------+---------------+------------+ | 15 | 16 | (Reserved) | To J2-7 | +----------+---------+---------------+------------+ | 17 | 18 | Head Select 2 | Input | +----------+---------+---------------+------------+ | 19 | 20 | Index | Output | +----------+---------+---------------+------------+ | 21 | 22 | Ready | Output | +----------+---------+---------------+------------+ | 23 | 24 | Step | Input | +----------+---------+---------------+------------+ | 25 | 26 | Drive Select 1| Input | +----------+---------+---------------+------------+ | 27 | 28 | Drive Select 2| Input | +----------+---------+---------------+------------+ | 29 | 30 | Drive Select 3| Input | +----------+---------+---------------+------------+ | 31 | 32 | Drive Select 4| Input | +----------+---------+---------------+------------+ | 33 | 34 | Direction In | Input | +----------+---------+---------------+------------+ The pin assignment follow industry standard practice for the designa- ted functions. J2 Data Signals ---------------- +----------+---------+---------------+------------+ |Ground Re-| Signal | Function | Direction | |turn Pin | Pin | | | +----------+---------+---------------+------------+ | 1 | 2 | Drive Selected| Output | +----------+---------+---------------+------------+ | 3 | 4 | (Reserved) | Output | +----------+---------+---------------+------------+ | 5 | 6 | Write Protect | Input | +----------+---------+---------------+------------+ | 7 | 8 | (Reserved) | To J1-16 | +----------+---------+---------------+------------+ | 9 | 10 | Spare | | +----------+---------+---------------+------------+ | 11 | 12 | Ground | | +----------+---------+---------------+------------+ | | 13 | +Write Data | Input | +----------+---------+---------------+------------+ | | 14 | -Write Data | Input | +----------+---------+---------------+------------+ | 15 | 16 | Ground | | +----------+---------+---------------+------------+ | | 17 | +Read Data | Output | +----------+---------+---------------+------------+ | | 18 | -Read Data | Output | +----------+---------+---------------+------------+ | 19 | 20 | Ground | | +----------+---------+---------------+------------+ The data signal connector pin assignment follow industry standard practice for the designated functions. J3 D-C Power Supply -------------------- Viewed from mating side +---------+ | 4 3 2 1 | +-+-+-+-+-+ | | | +---------- +12 VDC, Wired Color: Red | | +------------ +12 VDC return, Wired Color: Black | +-------------- + 5 VDC return, Wired Color: Black +---------------- + 5 VDC, Wired Color: Yellow Pin Assignments - The d-c power connector pin assignment follow industry standard practice for the designated functions. J6 Drive Adress ----------------- +---------------+ | J6 | ++-+-+-+-+-+-+-++ * * * * * * * * | | | | | | | | | | | | | | | +---------- Drive Select 1 | | | | | | +------------ Drive Select 2 | | | | | +-------------- Drive Select 3 | | | | +---------------- Drive Select 4 +-+-+-+------------------ Factory use only In multidrive installatons (up to maximum of four drives per host controller) it is necessary to configure each drive with a unique address. Each drive is shipped from the factory addressed as Drive 1. The drive may be changed to 2, 3, or 4 by changing the jumper socket on J6. Plug J6 is mounted on the printed circuit board immediately behind plug J1. Note: The other four pairs of pins on plug J6 are used for factory diagnostics. They must not be jumpered in normal field use because drive malfunction and data erasure could result. ********************************************************************** I N S T A L L ********************************************************************** PTI PT225/PT338/PT238R/PT357R OEM MANUAL Notes on installation ===================== Installation direction ---------------------- The drive can be mounted in any position! Mounting the Drive ------------------ 3 " Configuration The drive can be mounted in any position, making it ideal for portable applications. Overall width, height, and depth, mounting holes, and other key dimensions are compatible with industry standard minifloppy disk drives, to allow direct interchangeability. Sixteen 6-32 UNC-2B tapped mounting holes are provided, however only four are normally used a time. Eigth holes are provided for two alternative methods for side mounting, and eigth are for two alter- native methods for bottom mounting. The drive mounting frame must be used as part of the enclosure structure. Mounting points must be adjustable or resilient to prevent placing any undue stress on the drive mounting frame. The drive assembly is attached to the mounting frame with four shock mounts. Two precautions must be observed to assure the effectiveness of the shock mounts: Sufficient clearence must be provided around the drive assembly to allow at last 0.1" movement during acceleration, and mounting screw length must be chosen to engage no more than six threads (3/16") to prevent the screws interfering with the drive ass- embly. This will also assure that the screws will not bottom out in the blind-tapped holes. The mounting screws should be tightened to at least 9 inch-pounds, but no more than 11 inch-pounds. The usual open interior construction of the host enclosure will normally provide adequate convection cooling within the temperature limits given in the specifications of the drive. 5 " Configuration Optional bracket may be supplied already attached to the two sides of the drive mounting frame, to permit the drive to be inter inter- changeably used in standard 5 applications. One set of four base- mounting holes and two sets of four side-mounting holes are provided. Normally only one set of holes is used in time. The holes are tapped 6-32 UNC-2B. Caution: PTI drives are precision products that have been engineered to withstand normal handling when installed according to the accompany- ing instructions. However, they should be handled with the care warranted by any precision instrument and not dropped, jarred, or bumped. When the drive is not in its shipping container or installed in its properly designed host enclosure, it must be stored on a soft padded conductive (antistatic) surface. Failure to comply with the above procedure will void all warranties. Available Configuration ----------------------- The PTI drives covered by this manual are the Models PT225, PT338, PT238R, and PT357R. These model numbers refer to the basic 3 " micro Winchester package. The distinguishing differences are as follows: PT225: A two-disk drive designed for MFM applications. PT338: A three-disk drive designed for MFM applications. PT238R: A two-disk drive designed for RLL(2,7) applications. PT357R: A three-disk drive designed for RLL(2,7) applications. Each of these four basic models is also available with adapter brack- ets suitable for mounting the drive in a chassis designed for standard 5 " half-height drives. Each of the models may also be supplied with an optional bezel incorporating an activity LED. The 5 " mounting versions are packed one to a shipping carton, the basic 3 " versions are packed one or two to a shipping carton. Wiring Method ------------- Wiring for J1 and J2 should be in separate cables, and may be flat ribbon cable or twisted pairs. Cables from the drive to the host should be no longer than 20 feet. Wires for J3 and J4 should be no smaller than #18 AWG. Single-Drive Systems - In a single drive system, all wiring runs directly from the drive to the host system. Cables for J1 and J2 should run directly to the controller. Wires for J3 should run directly to the host power bus and the frame ground on J4 should run directly to the host system frame ground point. Multi-drive Systems - When a system contains more than one drive, a multiplexing process is used to direct thecontrol signals to or from the appropriate drive. The Control signals on J1 may be "daisy- chained" from one drive to the next. MULTIDRIVE SYSTEM INTERCONNECTIONS ---------------------------------- HOST +----------+ CONTROL +---------------------+ | |x---o------------------x|J1 | | | | +---DATA1-------x|J2 Drive #1 | | | | | +---------x|J3 J4 | | | | | | +-----x---------------+ |Controller| | | | +------------+ | | | | | | +---------------------+ | | o--+-----+---+-----x|J1 | | | | | +-DATA2+-----x|J2 Drive #2 | | | | | | o---+-----x|J3 J4 | | | | | | | | +-----x---------------+ | | | | | | o------------+ | | | | | | | +---------------------+ +----------+ o--+--+--+---+-----x|J1 | +----------+x---+--+ | ++---+-----x|J2 Drive #3 | | | | | |o---+-----x|J3 J4 | | |x---+-----+ || | +-----x---------------+ |Encoder/ | | || o------------+ |Decoder |x---+-DATA3-+| | +---------------------+ | | +--------+---+-----x|J1 | | |x--DATA4-----+---+-----x|J2 Drive #4 | | | o---+-----x|J3 J4 | +----------+ | | +-----x---------------+ | | | DC VOLTAGES ------+ o------------+ (RADIAL) | | FRAME GROUND ----------+ (RADIAL) Bezel ----- An optional bezel may be provided already mounted for the 3 or 5 configuration. An activity LED is provided on the front of the bezel, and plugs into J9 on the front of the printed circuit board. Mechanical Interface -------------------- Mechanically incorporating the drive into a host system entails making provision for securely mounting the drive frame and dressing the cables for the external electric connections. Electrical Interface -------------------- Electrical connections to the drive are made through two double-sided card-edge connectors (J1, J2), a cable plug (J3), and a frame ground lug (J4). The general functional category of each connector is as follows: J1 Control Input and Output Signals J2 Data Input and Output Signals (plus DRIVE SELECTED and WRITE PROTECT Control Signals) J3 D-C Power Supply J4 Frame Ground This separation of connectors by function relates to the recommended wiring method. The wiring for the control signals on J1 may be a single cable that is looped or "daisy-chained" from one drive to the next. The data and control signals on J2 plus the power and ground wires (J3 and J4), must be wired in a radial or "star" configuration directly from the controller to each drive. D-C Power --------- The power supply lines from the host to the drive consist of +12 Volts d-c, +12 Volts Return, +5 Volts d-c, and +5 Volts Return. All power supply voltages necessary for the operation of the drive are supplied through J3. The ripple and voltage should be held within the values given in the specifications. Any excursion outside these tolerance will initiate a Power-Fail condition, which causes the heads to retract and the spindle to brake. When power returns within tolerance, the drive will reinitialize. (A momentary power glitch may require the drive to be deselected and reselected.) Power to operate both the electronics and the drive motors must be provided from an external source through connector J3 on the printed circuit board. Two separate supply voltages are required: +12 and +5 Volts. The motor receive their drive current from the 12-volt supply. The external supply must be able to maintain the d-c voltages and the ripple content within the tolerances under all conditiones of normal operation. J1 Control Signals ------------------- Connector J1 is a two-sided card-edge plug with 34 golg-flashed contacts located 17 on each side, on 0.1" centers. The pins are numbered 1 through 34. The odd-numbered contacts are located on the side of the printed circuit board closer to the drive assembly (the side with most of components). The end contacts on each side are identified by numbers printed on the board. A polarzing-key slot is located between pins 4 and 6. A recommended mating ribbon connector is AMP part number 88373-3. It must be equipped with a polarizing key between pins 4 and 6. J2 Data Signals ---------------- Connector J2 is a two-sided card-edge connector with 20 gold-flashed contacts located 10 on each side, on 0.1" centers. The pins are numbered 1 through 20. The odd-numbered contacts are located on the side of the printed circuit board closer to the drive assembly (the side with most of components). The end contacts on each side are identified by numbers printed on the board. A polarizing-key slot is located between pins 4 and 6. A recommended mating ribbon connector is AMP part number 88373-6. J3 D-C Power Supply -------------------- Connector J3 is a male four-pin plug, AMP P/N 1-480426-0, mounted on a 6-inch pigtail attached to the printed circuit board. The pins are numbered 1 through 4. The recommended mating connector is AMP part number 1-480424-0 equipped with four part number 60617-4 pins. J4 Frame Ground ----------------- The Frame Ground lug must be connected directly to ground to achieve the error rates given in the specification. Use a minimum size of #18 AWG wire. The Frame Ground line between the host and the drive connects to ground lug J4 on the drive. To meet the error rate specified, it is important that this be connected to the main system grounding point. Connector J4 is a quick-connect lug terminal, AMP Faston part number 61761-2. The recommended mating connector is AMP Faston part number 62187-1. If the mating connector is not used, the ground lug is equipped with a soldering hole to accommodata up to #18 wire. J10 Termination Resistor Pack ------------------------------ In multidrive systems where the control signal cables is daisy- chained from one drive to the next, it may be necessary to remove the terminating resistor from socket J10. The drive is shipped from the factory with the resistor pack installed. Leave the resistor pack in place for a single drive system or in the last drive on the control cable (farthest from the controller) in a multidrive system. ********************************************************************** F E A T U R E S ********************************************************************** PTI PT225/PT338/PT238R/PT357R OEM MANUAL General ------- The Peripheral Technology Inc. (TI) family of 3 inch Winchester disk drives provides high performance, reliability, and low cost in a standard-size pckage. These microWinchester drives offer OEM and VAR users state-of-the-art 40 millisecond access time, very low power requirements, the industry standard ST506/412 interface, and a choice of memory capacity in a small package, for easy incorporation into the newest generation of small desktop and portable computers, in- strumentation systems, and multiuser systems. The four models provide a choice of data storage: either two or three disks, and either standard "MFM" encoding or the greater data density of "RLL" encoding. In the design and development of these new drives, a fresh look was taken at solving major problem areas in existing products. Winchester drives typically require a tradeoff between speed and significant power demands, and are very susceptible to data loss and irrecoverable damage from the shock and vibration of normal handling. The speed/power tradeoff was not only overcome, but the innovative design resulted in a drive with access time about half that of previous microWinchester and a power consumption of less than six and a half watts. The problem of data loss from normal handling was eliminated by automatically retracting and looking the heads in a non-data landing zone. This system is completely passive during normal operation. It functions not only when the power is manually turned off but also if there is an external supply or an internal malfunction. The PTI drives now now make it possible to make a battery-operated portable unit that is power efficient, insensitive to operating position, and immune to normal handling problems. Features -------- All PTI drives incorporate the following features, for superior performance and ease of use. - Proprietary system automatically moves heads away from the data area into a landing zone, where they are automatically locked, whenever power to the drive is removed. - Dynamic spindle braking action follows head locking, quickly stopping disks to minimize wear to head and medium. - Pulse-width modulation of motor drive current provides high efficiency, for reduced heat losses and longer component life. - Always-on buffered seek provides optimum head positioner velocity profile for faster access time. - Head-positioning servo always moves on the leading edge of first step pulse even through additional pulses are still being receiv- ed. - Embedded Track Zero provides increased reliability and greater precision with today's higher track desities. - Microprocessor-controlled Servo Calibration and Initialzation maintains continued accuracy and reliability. - Optical encoding in conjunction with position information embedded in each track precisely controls both position and velocity of read/write heads and hard disk. - Use of a brushless servo motor in conjunction with a rack and pinion drive provides efficent and precise head positioning. - Digital closed-loop servo drive system sharply reduces power demand to less than 6.5 watts. - Mechanical and electrical interfacing follows industry standards to cut system integration time and simplify special applications. Cooling ------- The very low power requirement of the PTI drive eliminates the need for large internal heat sinks and external fans for the drive itself. By reducing the total heat dissipation of the system and reducing the drain on the host power supply, it will also reduce the need for a system cooling fan. Maintenance ----------- No routine maintenance is necessary for PTI drives. There are no adjustments on the electronics circuit board, other than the config- uration procedure when used in a multidrive system. The mechanismus is sealed system and requires no additional lubrication. Repair ------ If a drive is suspected of malfunctioning, substitute a known-good drive if possible. Verify that all control and data signals conform to the level and timing requirements given in this manual. PTI does not recommended making any repairs to the electronics printed circuit board, including complete substitution of another board. Any service to the HDA (Head/Disk Assembly) can only be done in a clean room environment, so the complete drive must be returned to PTI for service. ANY ATTEMPT TO OPEN THE SEALED ENCLOSURE WILL VOID THE WARRANTY. Reliability ----------- MTBF: 25,000 poh Preventive Maintenance: None MTTR: 30 min Service Life: 5 years