Inovonics EN1235S Single-Button Belt Clip Pendant Transmitter

The Inovonics EN1235S is a single-button wireless belt clip pendant transmitter designed for personal alarm signaling, emergency notification, and security monitoring applications. Operating on the 902-928 MHz EchoStream frequency-hopping wireless platform, the transmitter provides one-button activation, automatic supervision with check-in messages every 3 minutes, and an LED that flashes during transmissions. Its compact housing measures 3.0 x 1.6 x 0.72 inches and includes a belt clip for wearable or fixed-position use. A replaceable CR2 lithium battery provides a typical operating life of 3 to 5 years.

Inovonics EN1235S EchoStream Single-Button Wireless Belt Clip Pendant Transmitter

The Inovonics EN1235S Single-Button Belt Clip Pendant Transmitter is a compact wireless signaling device designed for personal security, emergency notification, and remote alarm activation applications. Manufactured by Inovonics Wireless Corporation, the EN1235S provides single-button activation through the EchoStream wireless security platform, allowing users to transmit an alarm signal to a compatible Inovonics receiver or integrated security monitoring system. The transmitter includes a durable belt clip for attachment to clothing or equipment and can also be mounted in a fixed position for localized signaling applications. Its simple activation method makes it suitable for commercial security personnel, facility employees, healthcare staff, reception desks, service counters, and workplaces requiring convenient access to a monitored wireless alarm button. The EN1235S transmits activation and restoration signals to compatible receiving equipment, with the resulting alarm response determined by the receiver configuration and connected security system.

The EN1235S uses Inovonics EchoStream frequency-hopping spread-spectrum (FHSS) technology, operating within the 902-928 MHz frequency band in North America. The transmitter can also be configured for 915-928 MHz operation in Australia or 921-928 MHz operation in New Zealand, according to the manufacturer's regional frequency settings. EchoStream wireless communication distributes transmissions across frequencies to support reliable signaling in environments where other radio-frequency devices may be present. When the transmitter is configured for supervised operation, it sends an automatic check-in message every 3 minutes, allowing compatible receivers and security control systems to monitor transmitter communication. Each device includes a unique factory-programmed identification number for registration with the receiving system. A built-in LED flashes during wireless transmissions, providing immediate visual confirmation that the transmitter is sending a signal. Pressing and holding the activation button for at least 1 second initiates an alarm transmission, which is repeated while activated. Releasing the button generates an alarm restoration transmission for processing by the connected system.

The Inovonics EN1235S measures 3.0 inches high, 1.6 inches wide, and 0.72 inches deep (7.6 x 4.0 x 1.8 cm) and weighs approximately 2 ounces (57 grams). Its compact construction supports wearable operation without requiring a bulky handheld transmitter. The device is powered by a replaceable 3V Panasonic CR2 lithium battery, providing a typical battery life of 3 to 5 years under manufacturer-specified operating conditions. Battery replacement is performed by separating the housing, installing the new battery, and pressing the internal reset button to initialize the transmitter. The operating temperature range is 32 F to 140 F (0 C to 60 C), with a maximum relative humidity of 90% non-condensing. The transmitter is intended for operation within these environmental limits and is not identified as waterproof. The included belt clip supports portable use, while the optional ACC605-BK10 replacement belt clip accessory provides additional clips for maintenance or equipment replacement. The EN1235S meets the manufacturer's published FCC and RoHS compliance requirements.

The EN1235S integrates with compatible Inovonics EchoStream receivers and wireless infrastructure, including the EN4000 universal serial receiver, EN4200 security-only serial receiver, EN4204R four-zone relay receiver, EN4216MR 16-zone receiver, and EN4232MR 32-zone receiver. Supported system configurations can also incorporate compatible Inovonics repeaters, such as the EN5040 and EN6040-T, to extend wireless coverage in buildings where construction materials, distance, or other environmental conditions affect signal propagation. Before operation, the transmitter must be registered with the receiving system using its factory-programmed identification number and tested to confirm proper alarm communication. Unlike the Inovonics EN1235D dual-button belt clip pendant, which requires simultaneous activation of two buttons, the EN1235S uses one activation button for straightforward alarm signaling. It also differs from the EN1235SF fixed-position hold-up transmitter, which is specifically designed for mounted alarm applications with additional tamper protection. The EN1235S provides a flexible single-button wireless signaling solution for commercial security, staff assistance, and personal alarm systems where a compatible EchoStream receiver and properly configured alarm response are available.