Simplex (4905-9938) SmartSync Control Module 0626630

The Simplex 4905-9938 SmartSync Control Module (SCM) allows TrueAlert Non-Addressable Horns, Strobes, Horn/Strobe A/V units, and Speaker/Strobe S/V units to share a single Notification Appliance Circuit (NAC). The 4905-9938 accepts two FACP NAC inputs—one for strobe control (NAC IN) and one for horn control (HORN IN)—and combines them into a SmartSync two-wire NAC output. This architecture allows audible appliances to be silenced independently while strobes remain active. The 4905-9938 supports Class A wiring, Multi-Sync synchronization across up to 8 SCMs, and drives up to 35 strobe or 40 horn-only devices per circuit.

• Converts two conventional reverse-polarity NAC inputs into a single SmartSync two-wire NAC output
• Enables independent horn silencing without deactivating strobes
• 24 VDC nominal operation (16–33 VDC range)
• Supports Class A and Class B NAC wiring configurations
• Multi-Sync feature synchronizes up to 8 SCMs across multiple NACs
• Maximum NAC output load: 2.0 A (35 devices with strobes; 40 horn-only devices)
• SCM supply current: 30 mA maximum
• Not compatible with addressable TrueAlert appliances
• Part number 0626630; install instructions 574-719

Compatible Panels: Simplex 4006, 4008, 4010, 4100U, and other Simplex FACPs with reverse-polarity NAC outputs.

Compatible Appliances: Simplex TrueAlert Non-Addressable Horns, Strobes, Horn/Strobe A/V, and Speaker/Strobe S/V units; legacy Simplex synchronous-mode audible/visible appliances.

Life Safety Consultants has supplied Simplex SmartSync modules—including the 4905-9938—since 2002. For technical questions, call 1-888-557-0558 or email sales@lifesafetycom.com.