WBIO-DI-HVD-16 known issues

ERRHVD160001: incorrect lower activation-voltage limit on the front label

Affected devices

WBIO-DI-HVD-16 batches v2.2A, v2.2B, v2.2C, v2.2D, v2.2E, v2.2F, v2.2G, v2.2H, v2.2I, v2.2J, v2.2K, v2.2L, v2.2M, v2.2N, v2.2O, v2.2P, v3.2A, v3.2B/1, v3.2B, v3.2C, v3.2C/1 and v3.2D.

Description

The front label states an operating-voltage range of 50–250 V. The stated 50 V lower input-activation threshold is incorrect. The actual threshold is greater than 110 V AC.

Cause

The circuit was modified to improve the stability of the lower activation threshold. The threshold increased, but the front label was not updated.

Planned correction

Corrected labels starting with batch v3.2D/1.

Recommendations

None specified.

ERRHVD160002: inputs do not activate at 110 V AC

Affected devices

Listed batches: v2.2A, v2.2B, v2.2C, v2.2D, v2.2E, v2.2F, v2.2G, v2.2H, v2.2I, v2.2J, v2.2K, v2.2L, v2.2M, v2.2N, v2.2O, v2.2P, v3.2A, v3.2B/1, v3.2B, v3.2C, v3.2C/1 and v3.2D.

Description

Some or all inputs may fail to activate at the specified 110 V AC.

Cause

The optocoupler datasheet permits a wide current transfer ratio (CTR) range of 600–7,500%. Most devices have a CTR clustered around a common value and meet the specified input-activation voltage. Optocouplers near the lower 600% limit require a higher activation voltage.

Planned correction

In subsequent batches.

Recommendations

Warranty replacement if the described problem occurs.