Auxiliary Power Supply Module, 2A 12V

MFR PART #  B520
PART #  563893
Minimum 1 Each
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Provides auxiliary power to 12 VDC devices or to SDI2 modules.

Must be a reseller to purchase this product.


  • Provides up to 2 A of 12 V standby current for Fire or Burglar Applications (4 A of Burglary alarm current)
  • Supervises up to two 12 V 7-18 Ah batteries independently for up to 36 Ah of capacity
  • Provides up to 80 hours of standby time
  • Easy-to-read sitch addressing
  • Uses the Bosch standard TR1850 plug-in transformer

Tech Info

UL 864/365/609/636/864/985/1023/1076/1610, FM 3010, CSFM, ULC S303/S304, ULC-ORD C1023/C1076, ICES-003, CE, FCC


UNSPSC Code 46171600

Spec Sheet

Spec Sheet

Shipping and Fulfillment Policy

When you order products from, the order is processed within one to two business days. Orders received during non-business days are processed on the next business day.

You have several shipping options for parcel shipping: standard ground 5 to 7 business days, 2 to 3 business days, or next business day. orders ship to addresses within Mexico. orders do not currently ship to addresses outside Mexico or military/government APO/FPO locations. We are also not able to ship to Post Office Box addresses. If you wish to ship to an address outside Mexico or a military/government location, please contact your local Anixter sales representative to discuss your options.

In addition, offers Less-Than-A-Truckload “LTL” option for products that cannot be shipped via parcel shipping. For products that will be shipped via LTL, you will be provided with a set of Accessorials to select from to provide Anixter with additional shipping considerations, such as residential delivery, inside delivery, liftgate or limited access.

  • Residential Delivery - A residential delivery charge applies to shipments to a home or private residence, including locations where a business is operated from a home, or to any shipment in which the shipper has designated the delivery address as a residence.
  • Inside Delivery - When requested, freight carrier unloads shipments from or to areas that are not next to the trailer, such as shopping malls or office buildings. An elevator must be available to provide service to floors above or below the trailer.
  • Liftgate - Freight carrier provides liftgate service, if needed, to load and unload a shipment when loading/unloading docks are not available.
  • Limited Access Locations - A limited access location is a site where pickup or delivery is restricted or limited.

Shipping charges are calculated based on the shipping option you select, and is prepaid by you at the time of shipment.