The two output relays used in Nema type monitors and manufactured by a third party are subject to tin whisker growth. This growth is caused by the changeover to tin plating within the relay by the relay manufacturer in 2006. This changeover was made in an attempt by the relay manufacturer to comply with new environmental regulations known as RoHS.

The use of 100% tin plating has led to crystalline growths that can breach the contact arms and cause conductive shorts within the relay housing. Of the thousands of units shipped in the 10 month period, EDI has had 38 monitors returned to date with apparent whisker growth related shorts and ten intersections have been reported that were placed in Stop Time without a fault indicated.

REQUIRED. Affected products must be returned to the factory for replacement of the output relays.

Shelf mounted NEMA type Monitor Units shipped from July 2006 through April 2007.

The first four numbers of the nine digit serial number represent the Year and the Month of manufacture. For example, in the serial number of 060812345, the "06" digits would represent the year 2006, and the "08" digits would represent the month of August.

Affected date codes:

• 0607xxxxx (July 2006)
• 0608xxxxx (August 2006)
• 0609xxxxx (September 2006)
• 0610xxxxx (October 2006)
• 0611xxxxx (November 2006)
• 0612xxxxx (December 2006)
• 0701xxxxx (January 2007)
• 0702xxxxx (February 2007)
• 0703xxxxx (March 2007)
• 0704xxxxx (April 2007)

Only units with the above date codes are affected. Products manufactured and shipped outside the date range of July 2006 thru April 2007 are not affected by this recall.

The remaining five digits of the serial number (i.e xxxx12345) identify the specific incremental unit number produced within that month.

Replace the two output relays with new relays that contain a silver plating rather than tin. This is a factory required operation due to the complexity of the change and the need for factory testing of the monitor. Monitors returned to the factory will have both relays replaced, testing performed, and the warranty period restarted.

Units that have been through this factory change-out of the output relays will have the letter “K” added to the Revision Number of the serial number label, for example Rev: 0162K.

The serial number label is located on the top and forward-most area of the monitor chassis. Also a 3/8 inch diameter green dot will be placed on the front panel in the upper left-hand corner to assist in quickly identifying monitor units that have been through this factory change-out process.

Eberle Design can provide a user agency with an initial number of monitors to replace a portion of the recalled units that are installed in the field if necessary. The re-use of the shipping boxes of the replacement units is recommended.

The affected units should be returned to:
Eberle Design Inc.
RCL #
3819 E. La Salle Street
Phoenix , AZ 85040

Eberle Design will pay freight both ways and will return the units as quickly as possible. Please contact the factory by calling toll free 1-877-800-4370 and asking for recall assistance to obtain an RCL number. Be sure the shipment contains the RCL Number as well as contact information for return shipment.