ADLINK PCI-6308 Isolation Output Card Programming and Installation

6.3 Multi channel synchronous output

_6308_CA_0_3 (cardNo, DA0-Data, DA1_Data, DA_2Data, DA3-Data): Simultaneously updates channels 0~3 to ensure synchronization, suitable for multi axis servo synchronization commands;

_6308_CA_4_7 (...): Similarly, update channels 4-7.

The synchronous output is still constrained by the serial transmission timing internally, but the function has already processed the waiting state internally. After calling, it needs to be appropriately delayed or checked for status.

6.4 Digital I/O

_6308-DI (cardNo, * DIData): Read the status of 4 isolated inputs, with the low 4 bits corresponding to DI0~DI3, and the high 4 bits reading back the current digital output value (can be used for output read back verification);

_6308-DO (cardNo, DOData): Write 4 outputs, only the lower 4 bits are valid (values 0~15).

6.5 Current Range Control (PCI-6308A only)

_6308_S2V_Control (cardNo, ctrl) - Note that the manual states it as _6308_12V_Control (but it should actually be I2V, i.e. current voltage?)? The original function name is _6308_12V_Control, but it is described as voltage current mode control. Parameter ctrl optional:

I-0to20mA (0): Input 0~10V corresponds to 0~20mA;

I2 to 20mA (1): Input 0~10V corresponding to 4~20mA (zero transition);

I2 to 25mA (2): Input 0~10V corresponding to 5~25mA (extended range).

This function changes the output range of all 8 current channels, but does not affect the voltage output channel.

Operational Theory and Common Traps

7.1 Voltage output establishment and accuracy

The internal reference REF102 temperature drift is only 2.5ppm/℃, but the offset voltage of the peripheral resistor and operational amplifier OPA2134 may cause zero offset. If higher accuracy is required, calibration can be performed in the software (recording the measured voltage at 0 points and full range, and fitting correction).

When driving capacitive loads, it is recommended to connect a small resistor (such as 100 Ω) in series to suppress ringing.

7.2 Current output load limit

XTR110 requires external power supply (via onboard+15V or external connection), and when the load resistance increases, a higher loop voltage is required. On board+15V may not be sufficient for total current output, it is recommended to connect an external 24V power supply to the load circuit (but be careful of isolation). For 4-20mA, the typical load can reach 500 Ω (24V power supply).

The initial power on current is 0mA, which gradually changes after software setting to avoid startup shock.

7.3 Isolation precautions

The ground (AGND) on the analog output isolation side is completely isolated from the PC digital ground, but multiple channels share the AGND. Therefore, AGND should not be mixed with other isolated power sources to avoid damaging the isolation effect.

The digital input/output have independent isolation grounds (DIGND, DOGND), which need to be separately led out during wiring and cannot be short circuited.

Common troubleshooting process

Fault phenomenon 1: The device manager did not detect any new hardware

Check if the power supply of the PCI slot is normal (replace the slot for testing);

Confirm that "Plug&Play OS" is enabled in the motherboard BIOS;

If the 0A5 version (supporting 3.3V) is inserted into the old slot with only 5V, the voltage standard needs to be checked.

Fault phenomenon 2: The analog output is fixed at 0V or full bias and does not change with the program

Check if the jumper settings are correct, especially the reference source and polarity of JP9~JP12;

Measure whether the internal reference REF102 output is+10V (pin 6 pairs AGND);

Call _6308_Set_date to confirm if the write was ignored due to incomplete previous transmission.

Fault phenomenon 3: No change in current output or constant 0mA

Confirm that the board is PCI-6308A (PCI-6308V with no current output function);

Check if the _6308_S2V_Control has been set correctly and the corresponding voltage output channel has been written with the corresponding value (current driven by voltage);

Measure whether the external load connection is correct (between An and AGND) to ensure the integrity of the circuit.

Fault phenomenon 4: Digital output cannot drive relay

Confirm the external pull-up resistor and power supply (DO is an open collector and must be plugged in);

Check if DOGND is connected to the external power supply ground;

Measure whether the input current exceeds 50mA when the output is low, and if it is overloaded, protect the transistor.

Fault phenomenon 5: When multiple channel outputs jump simultaneously, they are not synchronized

Use the synchronization functions of _6308_CA_0_3 and _6308_CA_4_7 to avoid the time difference caused by channel by channel writing.

Maintenance and technical support information

Regularly check the fastening of terminal board screws to avoid vibration loosening;

If you need to replace the board, please turn off the power and discharge static electricity first;

The driver program and sample code can be downloaded from the ADLINK official website (PCIS-DASK package), and the PCIS-DASK/X shared library can be selected for Linux environments.

When encountering unsolvable problems, collect the following information to ADLINK technical support（ service@adlinktech.com report