CP-35

What is this control module used for?

It is the main control unit for a Siemens System 3 modular fire detection and control panel. It manages alarm and trouble indication, system reset and lamp testing, audible alarm control, and connections to compatible detection and output modules.

Which functions are provided on the front panel?

The control unit provides system power, alarm and trouble indicators, a lamp test/reset control, and switches for trouble silence and subsequent alarm silence.

Does the unit include an audible alarm circuit?

Yes. The CP-35 includes one supervised audible alarm circuit rated at up to 1.5 A. Additional compatible alarm extender modules may be required when separate circuits or greater alarm-device capacity are needed.

Does the control unit provide detection zones?

Yes. It incorporates two detection zones. Application requirements should be checked carefully, as these onboard zones are not intended for certain US Coast Guard-approved configurations where individual zone alarm and trouble test switches are required.

What power supply is normally used with the unit?

The control unit is normally paired with a Siemens PS-35 power supply, which converts the incoming AC supply into the 24 VDC power used by System 3 modules. The exact power arrangement depends on the panel configuration and regional input-voltage requirements.

Where should the module be positioned within the enclosure?

In a standard System 3 configuration, the CP-35 is installed on the left side of the enclosure's top row. The associated PS-35 power supply is positioned on the right side of that row.

Which enclosure types are associated with this control unit?

The System 3 platform uses modular enclosures such as the EA-32, EA-33 and EA-35. Enclosure selection depends on the number of module rows and spaces required for the complete panel configuration.

Can additional detection and control functions be added?

Yes. The modular System 3 design allows the control unit to operate with compatible zone, relay, alarm extender, switch, annunciator, battery and power-transfer modules. Modules must be selected and interconnected according to the approved system design.

How is module placement supervision completed?

System modules are connected through the panel bus. The unused receptacle on the final module is connected back to terminal 41 of the CP-35 using the specified supervision cable assembly, completing the module placement supervision circuit.

What are the typical current requirements?

Published System 3 calculation data lists approximately 150 mA in supervisory operation and 260 mA in alarm for the control unit. A configuration incorporating the BC-35 is listed at approximately 195 mA supervisory and 290 mA alarm. Total panel demand must also include all connected modules and alarm devices.

Can battery standby be incorporated into the panel?

Yes. Compatible System 3 battery charger, battery extender and metering modules can be incorporated where standby power is required. Battery capacity must be calculated from the complete panel's supervisory current, alarm current and required standby period.

What should be checked when replacing an existing unit?

Confirm the model marking, terminal arrangement, enclosure position, incoming power configuration, module bus connections, audible circuit loading and compatibility of every connected System 3 module. Installation and functional testing should be completed by appropriately qualified fire alarm personnel.