Foxtrot basic module power supply

For its proper function the module requires smoothed 24 VDC power supply. If a battery backup is required, the system can be supplied from a 27.2 VDC source. It is recommended to use the PS2-60/27 power supply. For detailed information regarding the source, see Chapter 2.1.1 The PS2-60/27 power supply . Maximum power consumption of the system (at the full load - with switched relay outputs, an additional submodule fitted and with active communication) is about 6 ÷ 10 W(depending on the type of basic module); without the fitted submodule it is around 2 ÷ 6 W. This does not apply to the basic CP-1000 and CP-1001 modules; for information on their power supply, see Chapter 2.7.1.

A table with the power consumption of the Foxtrot basic modules

1) All inputs and outputs are energized (closed inputs, connected sensors, closed relays, etc.), fitted with a submodule with a maximum permissible power consumption.

2) All inputs and outputs are energized (closed inputs, connected sensors, closed relays, etc.), no submodule is fitted, or a conventional submodule is fitted with the RS-232, RS-485, RS-422 interface.

There is a galvanic connection between the power supply voltage and the CH1 and CIB1 communication interfaces, and the TCL2 system channel, and mostly also with DI/AI inputs on the basic module (typically connectors on the top side of the module); this does not apply to the CP-1003 - see Chapter 2.7.2. These circuits are also galvanically connected with the power supply of the system, if the CH2 channel is fitted with a submodule with I/O circuits without galvanic isolation.

The common terminal is the GND (e.g. the A3 terminal in CP-1004).

During the application of this system it is necessary to take into account the common terminal (galvanic connection) of the above-mentioned I/O module parts - especially when powered from multiple locations, multiple power sources or if there is a risk of ground loops.

SELV:

If the power source meets the parameters of the SELV source in accordance with the EN 60 950 (ČSN 33 2000-4-41) standard, then all I/O circuits of the system meet the SELV requirements. This also applies if the relay outputs switch low voltage circuits (the isolation of relay outputs from the internal circuits of the system is 4 kVAC).

Determination of the power source output:

An optimal source to supply power to the control system itself has an output of minimum 15 W (which does not apply to the CP-1000). If other circuits are also powered from the same source, its power output must be proportionately increased. If a source with an unstabilized output is used, it is necessary to fully comply with the load permissible by the application's supply voltage range, especially in the case of using sources with a large excess capacity.

If you want to power the central module without a backup (a wiring example see Chapter 2.7.1.1, we recommend the DR-60-24 or DR-100-24 sources (depending on the total power consumption of the powered circuits).

If you want to power the central module with a backup battery we recommend the PS2-60/27 source (see Chapter 2.2.1 Backup power supply CP-1004, the PS2-60/27 source).

Protection of power supply:

The power input (A4 terminal) is not protected by an internal fuse. We recommend to install an upstream external fuse with a nominal value of T500L250V. This does not apply to basic CP-1000 and CP-1001 modules; for information on their power supply, see Chapter 2.7.1.