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APPENDIX 2

Input Connections

There are 8 input terminals on Dualcom (16 with the CS1050 Expander).

When Dualcom is triggered the voltages on the input terminals are 0 volts changing

to a positive voltage, (normally +4 volts to +12 volts), or they may be a positive

voltage changing to 0 volts. This is called ‘positive applied’ or ‘positive removed’

triggering.

The Inputs may be programmed to send an alarm call when a positive voltage is

applied to an input or when a positive voltage is removed. See the CS2054

NVM Programming Manual for details and the Self-learning feature on page 13.

The figure above shows the internal connections of the Dualcom inputs.

The +12 volt and 0v connections from the Control Panel or Power Supply is

connected to the +12v & - 12v terminals.

Each of the input terminals on Dualcom is connected to 0 volts by a resistor.

Therefore, by leaving an input terminal unconnected this will ensure that that

the input is connected to 0 volts.

The ‘Start+’ terminals on Dualcom is an output. It will give a positive’pull-up’

voltage which can be used to assist input triggering.

The ‘Start-’ terminal is hard connected to 0 volts and can be used to assist

input triggering.

Dualcom internal connections

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Connect Systems CS1001 Manual de Instalação Página 40