USD II

System Overview Power and Solenoid Harnesses Driver Modules Terminating Connectors Rack ID Jumpers Wcom Software for DOS Transmission ID Making an External Harness Face Plate Description Pricing

System Overview

	The power harness
	The solenoid harness (and the rear adapter harness if your upgrading)
	The driver modules (at least one driver module must be installed in slot 0)
	The terminating connectors
	The rack ID jumpers
	Wcom software for Dos

Power and Solenoid Harnesses

The power harness supplies +12v for the driver modules and +12v for the solenoids through the mother board. The solenoid harness carries the current to the solenoids and also provides transmission ID wires, which are used for customizing solenoid harnesses that will enable the USD II to detect what type of transmission solenoid configuration is connected to it (see the technical manual for a complete pin-out of the power and solenoid harnesses).

The rear adapter harness is to provide an interface between the USD II and the original USDB solenoid harness. The rear adapter harness converts the fifty six and twenty pin Edac connectors (located on the USD II's mother board) into thirty seven and fourteen pin Amp connectors; thus, providing compatibility with the USD II's predecessor.

Driver Modules

In order for the USD II to function, a driver module needs to be plugged into slot 0. The type of module (i.e., VFS (Variable Force Solenoid), PWM High Impedance, PWM Low Impedance, ROC (Regulated Output Current) or an ON/OFF driver module) used in slot 0 doesn't matter, because the various driver modules are not slot dependent (slot 0 is located as the first slot on the left while facing the front of the USD II).

The driver modules have two circuit boards, the smart card, which handles the communication between the other driver modules and the host computer. The second circuit board, the daughter card, which contains the driver IC that drives the solenoids. The daughter cards are designed to plug on to the smart cards and can be easily removed. The daughter cards also contain the circuit protect fuses, and can be easily replaced if necessary.

As new driver ICs are developed, daughter cards can be designed for the application of the new IC. The board outline and other technical files are obtainable from Global Electronics Ltd. (formally known as AutoFlex).

Terminating Connectors

There are two BNC connectors mounted on the rear of the USD II. These BNC connectors are used for connecting a coaxial cable between two USD II mother racks (currently two mother racks can be daisy chained together; thus, allowing a total of fourteen driver modules). It is important to note, any unused rear BNC connector needs a 50W terminating connector installed.

Rack ID Jumpers

Located on the rear of the USD II are three jumper pins (J11, J12 and J13). These jumper pins are used to identify the mother rack connected to the host computer. If a second rack is needed then use the following jumper configuration:

• Rack one, jumper J11 open, J12 open, J13 open
• Rack two, jumper J11 shorted, J12 open, J13 open

If you are using only one rack, then there are no jumpers required, but 50W terminating connectors need to be installed on the rear BNC connectors. (Future updates will allow eight racks to be daisy chained together for a total capacity of fifty six driver modules (see the technical manual for additional jumper requirements).

Wcom Software for DOS

The Wcom software is a DOS based program that allows the user to control the solenoids from a PC across a serial link. Using this software requires an understanding of the hexadecimal numbering system and a programming manual that lists the software commands for the USD II. This software is available for system troubleshooting.

Transmission ID

Setting a transmission ID is done by installing jumper wires within the external solenoid harness (the harness that goes between the USD II and the transmission solenoids).The 56 pin Edac connector mounted on the harness that plugs into the USD II is where the jumpers go. The jumpers are made up of twelve gauge wires crimped onto the Edac pins.

If a transmission ID of "manual" is selected, then any solenoid configuration will be accepted by the program. This makes it convenient to test a single solenoid or a combination of solenoids not associated with a transmission solenoid configuration. Subsequently, if a transmission ID for a specific transmission is selected, then the Univwin program will look to verify that the solenoids, associated with the specific transmission, are connected properly (see the technical manual for the jumper configurations to select specific transmissions).

Making an External Harness

External harnesses are made up of sixteen gauge wire and a 56 pin Edac connector. One end connects to the solenoid(s) and the other end plugs into the mating 56 pin Edac connector on the USD II. The pin out information needed to make up an external harness is located in the technical manual.

Face Plate Description

Each driver module is a subsystem component. Below is a description of the face plate features on each module and what they mean (see figure 1 for reference).

	Analog Out BNC: This is an output connector for use as an oscilloscope hook-up. This allows the user to view the DC voltage delivered to the solenoid.
	Solenoid Status LEDs: These LEDs show when the solenoids are activated. There are four LEDs to indicate the status of the on/off solenoids because a single on/off driver module drives four solenoids (in slot 0 or 1).In the case of the VFS, PWML and PWMH solenoid modules, which drive just one solenoid, only LED number one will light, when the solenoid is active, indicating a good status.
	Power LED: The power LED indicates there is power delivered to the module.
	HI Fuse and LO Fuse OK LEDs: These two LEDs light when the fuses on the daughter cards are operational. In the case of a open fuse the corresponding LED will be off and the solenoid OK LED will also be off.
	Wart Pres: This LED indicates a daughter card is installed on to the smart card.
	Solenoid OK LED: This indicates the solenoid is connected to the circuit.
	When the USD II is powered up each LED will be on, with the exception of the solenoid status LEDs, showing each component is functioning; however, the solenoid status LEDs will only come on when the solenoid is activated.