Code Blue CB4s SYL RAs NP 24v Relay Assembly - CB4S00178

Code Blue CB4S00178 24V DC Relay Assembly

Overview

The CB4S00178 is a 24V DC relay assembly replacement component for Code Blue CB4s paging amplifier systems. This unit handles switching and control functions within distributed audio installations where the paging amplifier has transitioned to 12–24V DC power standards. The relay assembly integrates into existing CB4s production and retrofit setups, maintaining seamless switching control across voltage ranges that modern security communication systems now standardize on.

Compatibility

The CB4S00178 is engineered specifically for the Code Blue CB4s series paging amplifier enclosures. It replaces the OEM relay assembly in CB4s wall-mount installations and production-integrated audio systems. Verify your existing CB4s amplifier part number against the compatibility list in the Code Blue parts catalog before ordering — the SYL RAs NP designation denotes this specific relay configuration for the CB4s line.

Installation Notes

This is a replacement internal component. Installation requires access to the relay mounting points inside the CB4s enclosure. The 24V DC voltage rating must match your installed paging amplifier supply — installations running 12V systems will require a separate voltage check before commissioning. Standard hand tools and a basic multimeter are sufficient for swap-out work. Do not force the relay into its socket; seating should be firm but smooth. After installation, verify audio control switching (volume ramp, zone triggering, page activation) before returning the unit to service.