Product Specification Sheet APS210

Rev. 07/2013

SDR-R-25 Card Cage Assembly

This Specsheet is for a product which is discontinued. Please contact us for alternative products.
Architects' And Engineers' Specifications
The Card Cage Assembly shall be Alpha Communications®/Zenitel model #SDR-R-25 or approved equivalent. The assembly shall consist of 18 gauge steel finished in Black epoxy and shall be 5.25" H x 19.00" W x 8.00" D. The assembly shall have a capacity of 25 boards, in groups of 5. The #SDR-R-25 is designed to mount in standard EIA 19" rack assemblies located in either Zenitel intercom cabinets or provided separately. The SDR-series will house Zenitel #SDR-112, #SDR-113 and #SDR-115 Sound Detection Relay boards, for operation in various Zenitel intercom systems.

Contractor shall observe all local and national electrical and building codes.

SDR-R-25 Card Cage Assembly
The Alpha Communications® #SDR-R series card cage assemblies provide compact housing and connections for the Zenitel SDR series Sound Detection Relay boards. The card cage is designed to mount in standard 19" rack assemblies located in either Zenitel intercom cabinets or provided separately. The #SDRR can be provided with 5 mother boards. Each mother board has five (5) 10 pin edge connectors with screw terminals on the back for field wiring. The SDR-R series will house Zenitel #SDR-112, #SDR-113 and #SDR-115 Sound Detection Relay boards, for operation in various Zenitel intercom systems.
  • For sound detection relay boards
  • Holds up to 25 SDR boards
  • Fits into standard 19" rack
  • Simple field hook-up
  • Compact and stackable
  • Rugged metal construction
Housing: 18 gauge steel finished in Black epoxy
Dimensions: 5.25" H x 19.00" W x 8.00" D (133mm) x (483mm) x (203mm)
Capacity: Total of 25 SDR boards, in groups of 5
Connectors: Edge connector for SDR, screw terminals for field wiring
Power: 24VDC, 50 mA per SDR board
Mounting: Mounts in standard EIA 19" rack
Alpha Communications
42 Central Drive • Farmingdale • NY • 11735-1202 • Phone: (631) 777-5500 • Fax: (631) 777-5599
TOLL-FREE: (800) 666-4800 • Web: • Email:
Copyright© 1998-2020 Alpha Communications® - All Rights Reserved.
Due to continuous product improvement, all colors, sizes, materials, finishes and specifications are subject to change without notice.