2-1S E C T I O N 2Installing the Control Unit• • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • •In This Section© About the Control Unit© Before Installing the System© Mounting the Cabinet© Installing the Cabinet Lock© Grade A Mercantile Premises Listing© Grade A Mercantile Safe and Vault Listing© Installing the Control's Circuit Board• • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • •About the Control UnitThe control unit is the main circuit board of the system. It provides:• Dual microprocessor firmware IC chips (16-bit primary MPU, 8-bit secondary).• A non-volatile SRAM IC chip for storing the programmed data, so the data will not be lost if thesystem loses all power.• Dual RS-485 buses for connecting the operating panels, gateways, and printer interfaces.• 8 built-in hardwired points.• 8 built-in output triggers.• A built-in communicator and mounting space for an optional backup dialer or an optional ACCommunicator Module.• 2 built-in supervised bell outputs and an auxiliary relay.Before Installing the SystemBefore installing the control unit or any components of the system, go through the following steps tomake sure the system will meet the customer’s needs and that power requirements and wire runs willensure proper operation.System Layout Diagram1. Make a preliminary diagram showing the location of each component on the RS-485 buses. Includethe control unit, the RS-485 bus run(s), the gateways, operating panels, etc., as well as any powerunits that may be required.2. Indicate the cable distance between each device on the RS-485 bus run(s) and indicate the currentdrawn by each device.3. Review the power requirement information that is presented in the paragraphs that follow andfinalize the system layout diagrams, making changes as required.4. Check that the system components to be installed and their location are in agreement with thesystem layout for the installation to ensure proper operation of the system.5. Verify the electrical connections to the CWG and 24-hour, continuous-duty AC power outlet.
