Inovonics EN4204R Four Zone Add-On Receiver with Relay Outputs

The Inovonics EN4204R is a four-zone EchoStream wireless add-on receiver with relay outputs that connects up to four compatible wireless transmitters to hardwired security panels or standalone alarm systems. Operating on 11-14 VDC, the receiver uses 902-928 MHz frequency-hopping spread spectrum technology in North America and provides four Form C alarm relays and one Form C fault relay. Independent relay programming, transmitter supervision, LED status indicators, tamper protection, and RF interference detection support reliable wireless security system integration.

Inovonics EN4204R Four-Zone EchoStream Wireless Receiver with Relay Outputs

The Inovonics EN4204R Four-Zone Add-On Receiver provides a practical way to incorporate wireless security devices into existing hardwired alarm systems without replacing the primary control panel. Designed for use with Inovonics EchoStream wireless transmitters, the receiver registers and supervises up to four individual wireless devices, translating their transmitted alarm signals into conventional relay contact outputs. Its five integrated Form C relays include four dedicated alarm outputs and one fault output, allowing connection to compatible hardwired burglar alarm panels, commercial security systems, and standalone monitoring equipment. The EN4204R supports wireless expansion in applications where installing additional signal wiring is difficult, costly, or impractical.

The EN4204R incorporates EchoStream frequency-hopping spread spectrum (FHSS) technology, operating within the 902-928 MHz frequency band for North American installations. Advanced radio communication and internal antenna technology help maintain wireless signal reception across supported security environments. Each of the four alarm relay outputs can be independently configured for follower, latching, momentary, or toggle operation, allowing the receiver to accommodate different alarm control and monitoring requirements. The integrated Form C relays are rated at 1A at 28 VDC or 0.5A at 30 VAC for resistive loads. The receiver operates on 11-14 VDC with a maximum current requirement of approximately 400 mA when all five relays are energized.

The EN4204R continuously supervises registered wireless transmitters and provides visual indicators for alarm conditions, transmitter tampering, low batteries, inactive devices, and receiver power status. Its separate fault relay supports system trouble monitoring, while integrated case tamper detection and radio-frequency jamming detection help identify unauthorized enclosure access and wireless interference. A built-in wireless programming routine allows technicians to register transmitters and configure output behavior directly at the receiver without requiring a separate programming computer. A dedicated reset input accommodates an external momentary switch for clearing faults, resetting latched outputs, and restoring the receiver to its normal operating condition. These features support installation, system diagnostics, and ongoing maintenance.

Designed for indoor security installations, the Inovonics EN4204R features a compact wall-mounted enclosure measuring approximately 6.5 inches wide, 3.6 inches high, and 1.025 inches deep. Its operating temperature range of 32 F to 140 F (0 C to 60 C) and humidity tolerance of up to 90% non-condensing accommodate typical commercial and residential equipment locations. The receiver supports compatible EchoStream intrusion detection, alarm initiating, and security transmitters, with wireless coverage dependent on building construction, interference, and proper receiver placement. Manufacturer documentation identifies compliance with UL 365, UL 636, UL 985, UL 1023, UL 1610, UL 1076, and ULC/ORD-C1023-74, subject to the applicable installation requirements. By combining four wireless zones, programmable relay outputs, transmitter supervision, and built-in diagnostic features, the EN4204R enables professional security installers to extend existing wired systems with compatible wireless detection devices.