scope:

This specification covers alarm switchboards, alarm panels, remote signal units, sentry alarm switch, and special alarm connection box for use with Naval surveillance and protective systems.

Alarm switchboards shall be of the following types, as specified (see 6.2.1):

Type Line voltage, 60 hertz (Hz) Supervisory voltage1/ IC/SCG 115 Volts (V) 220 Volts direct current (V d.c.) IC/SFZ or S4FZ 115 V 120 V d.c. IC/SM 115 V 5 + V d.c.; root mean square (rms), − 0 full-wave, rectified (unfiltered)

The size of the switchboard shall be designated by the full capacity of the enclosure (see 3.4.1.1 through 3.4.1.3 and 6.2.1). A typical designation of the actual number of circuits required is as follows:

Number of circuits Type Size required ---- ---- ------------------ IC/SM 20 18

Alarm panels shall be of the following types, as specified (see 6.2.1):

Number of Supervisory Type lines Line voltage (60 Hz) voltage ---- --------- -------------------- ----------- IC/B51 2 115 V 120 V d.c.1/ IC/B52 4 115 V 120 V d.c.1/ IC/BCG51 2 115 V 220 V d.c.2/ IC/BCG52 4 115 V 220 V d.c.2/

Beneficial comments (recommendations, additions, deletions) and any pertinent data which may be of use in improving this document should be addressed to: Commander, Naval Ship Engineering Center, SEC 6124, Department of the Navy, Washington, DC 20362 by using the self-addressed Standardization Document Improvement Proposal (DD Form 1426) appearing at the end of this document or by letter.

Remote signal units shall be of the following types, as specified (see 6.2.1):

IC/EA IC/EAP IC/EAW

The sentry alarm switch shall be a type IC/SW.

The special alarm connection box shall be the type shown on Drawing SS-402-1701749.

intended Use: