GE VMIVME-2128 128 bit high voltage digital output board

GE VMIVME-2128 128 bit high voltage digital output board

Product Overview

Basic function: VMIVME-2128 can provide 128 channels of high voltage and/or high current surge current output. Its open collector electrode output driver supports output voltages from 5 to 48VDC and has built-in test (BIT) logic, allowing users to verify the operation of each channel under software control.

Key Features

128 channel high-voltage digital output (5 to 48VDC), supporting 8-bit, 16 bit, or 32-bit VME data transmission.

High current open collector electrode driver (600mA current) with built-in suppression diode, output can be connected in parallel for higher driving capability, optional open collector electrode pull-up resistor.

The output has fault protection function (when the current exceeds 1.0A, the output is turned off), built-in testing logic, and a software controlled fault LED on the front panel (for built-in testing).

Users can configure address jumpers to allow for continuous addressing of multiple boards when used in a VME system.

Application scenarios: Suitable for various applications such as relay drive, lamp drive, solenoid drive, hammer drive, stepper motor drive, LED drive, high current and high voltage drive, fiber optic LED drive, etc.

Security Summary

To minimize the risk of electric shock, the chassis and system cabinets must be connected to electrical grounding, using three core AC power cords, and correctly connected to grounded sockets.

Do not operate the system in an explosive atmosphere to avoid potential safety hazards.

Operators are not allowed to remove the product casing. Component replacement and internal adjustment must be carried out by qualified maintenance personnel. When replacing components, do not connect the power cord. Even if the power cord is removed, there may still be dangerous voltage in some cases. Before contacting the circuit, the power supply must be disconnected and discharged.

Do not perform internal repairs or adjustments alone, personnel who can provide first aid and resuscitation must be present.

Do not replace components or modify the system to avoid introducing additional hazards. Product repairs should be returned to the GE Fanuc embedded system to ensure that safety functions are maintained.

Dangerous program warning: There will be a warning in the manual before potential dangerous programs, and the instructions in the warning must be followed.

Safety symbols

STOP: Inform the operator not to perform a certain operation, as it may result in personal injury or partial or complete damage to the system.

Warning: Indicates the presence of danger and reminds attention to a certain procedure, operation, or condition. Improper execution or compliance may result in personal injury or death.

CAUTION: Indicates the presence of danger and reminds attention to a certain operating procedure, operation, or condition. Improper execution or compliance may result in partial or complete damage to the system.

NOTE: Remind attention to an important program, operation, or condition.

Operating principle

Functional modules: The design of the VMIVME-2128 board mainly consists of four parts: VME basic logic, device addressing, output drivers, and built-in test logic. It supports eight 16 bit bidirectional registers, one control and status register (CSR), high-performance output drivers, typical VME basic logic, and device address jumper groups, which allow users to select the base address.

Device Addressing: Supports data transfer in short or standard I/O memory space, with monitoring and/or non privileged data access capabilities. The I/O access type is selected through jumper wires, and the factory defaults to responding to short monitoring I/O access.

VME basic logic: composed of drivers, receivers, and control logic, the DTACK generator is designed to provide high data transmission rates.

Data transmission: The data transmission transceiver supports read and write operations on 8-bit, 16 bit, and 32-bit boundaries.

Register control logic: Supports read and write operations on eight 16 bit bidirectional dual port latches, as well as read operations on CSR registers that control test modes and front panel LEDs. The 128 bit high voltage output can be addressed as four 32-bit long words, eight 16 bit words, or sixteen 8-bit bytes.

Built in testing (BIT): By enabling the test mode bit in CSR, test data can be written to any output data register (ODR) in test mode and read back during read operations. At this time, all drives are turned off (tri state), and ODR can be read independently of the test mode bit at any time. This function provides real-time loopback testing (when the output driver is connected) and offline diagnostic testing (when the output driver is disconnected from the field device) capabilities. The front panel has a fault LED for quick fault isolation to the board level. The fault LED lights up when powered on or the system is reset, and the user can turn it off after successful diagnosis.

Output driver: Equipped with thermal and surge current shutdown protection, surge current protection allows up to 990mA of surge current before the driver shuts down. If the surge current of each channel in the external circuit exceeds the 990mA limit, preheating resistors should be used. SIP resistor sockets are provided on the board for these preheating resistors, which must be of bus type, with pin 1 as the common terminal and pin 1 of the socket grounded. The power rating of the SIP resistor should be sufficient to handle the required power consumption. The output driver user load return current must provide the lowest possible resistance return path to the user voltage source, and must not be returned through VME backplane digital ground. It must be returned to the user power supply through the B-row pins of the front panel connectors P3 and P4, or through pins A1 to A26 of the P2 connector if the P2 user ground option is ordered. If the user's grounding quality is poor, causing the user's load to return current to the digital grounding of the backplane, fuse F1 will melt and make the board unable to work. A blown fuse usually indicates poor grounding quality for the user, and this fuse circuit is necessary for the digital input grounding return of the control signal to the output driver.