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The OPTEX EN-4204R is a 4-zone add-on wireless receiver with integrated relay output, designed to expand the detection and control capabilities of compatible wireless security and alarm systems. This add-on receiver picks up signals from paired wireless sensors and transmits zone status to a connected control panel via its onboard relay. It is suited for residential and light commercial installations where additional zone capacity is needed beyond what the primary receiver provides. Licensed security technicians and alarm system installers are the primary trade that specifies and installs this component.
The EN-4204R is used as a supplemental receiver in wireless alarm and access control system deployments. It is applicable in residential security builds, small commercial intrusion detection layouts, and any installation where the base receiver has reached its zone limit and additional wireless sensor coverage is required. It fits within broader wireless detection infrastructure rather than acting as a standalone controller.
Designed as an add-on expansion receiver for use within compatible OPTEX wireless receiver and repeater system configurations. No specific compatible model numbers were provided in the product data; verify compatibility with your existing OPTEX system before installation.
Installation is typically performed by a licensed alarm or low-voltage systems technician. De-energize the existing control panel and receiver system before connecting the EN-4204R. Follow applicable local low-voltage wiring codes and the control panel manufacturer guidelines when integrating the relay output. Verify zone assignments and pairing with wireless sensors after installation to confirm proper signal reception before restoring power.
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