The Edwards 4-CABL0509 EST4 Flex Interconnect Cable is an internal connection cable designed for Edwards EST4 fire alarm systems. It is part of the EST4 4-CABL family of purpose-built internal flex cables.
Product Functions
- Provides an internal EST4 interconnection
- Connects the 4-ANNCPU to the 4-LCDAUDTEL
- Designed for 4-MPLT mounting configurations
- Supports horizontally mounted 4-ANNCPU installations
- Used with EST4 audio and firefighter telephone controls
- Provides a dedicated factory-designed flex connection
- Designed for compatible EST4 cabinet configurations
- Used as an internal system cable rather than field circuit wiring
4-ANNCPU Connection
One end of the 4-CABL0509 connects to:
4-ANNCPU — Annunciator Central Processor Module
at: Connector J18.
The 4-ANNCPU serves as the control element for EST4 annunciator user-interface and control-display equipment. The 4-CABL0509 provides the required interconnection when the annunciator CPU is used with the 4-LCDAUDTEL in the specified mounting arrangement.
4-LCDAUDTEL Connection
The opposite end connects to:
4-LCDAUDTEL — Audio and Firefighter Telephone Control Display Module
at the module’s:
J1 connector.
The 4-LCDAUDTEL provides user-interface functions associated with EST4 audio and firefighter telephone operations.
Cabinet Compatibility
Edwards ordering information identifies the 4-CABL0509 for 4-MPLT installations in:
CAB7
CAB14
CAB21.
A documented installation example shows the 4-MPLT installed in the battery space of a 3-CAB7B, with the 4-CABL0509 running between the 4-ANNCPU and 4-LCDAUDTEL.



