Technical Specifications
Auxiliary Power Input Specifications.
Auxiliary socket input voltage range:
8V to 24V dc (typically 12V)
Polarity:
Centre pin +ve
Reverse Polarity Protection:
Yes
Connector type:
Barrel socket, 2mm centre pin.
Maximum current draw:
500mA
Device Socket Output Specifications.
Volt-free contacts, polarity unimportant.
Each socket electrically isolated from others, although voltage offsets should be minimised, especially
in light of safety considerations.
Maximum applied voltage, either polarity:
24V dc
Maximum current:
300mA
Typical on-state resistance:
1
Ω
Maximum on-state resistance:
3
Ω
Switching technology:
Opto-isolated MOSFETs.
A technical note about using FREEDOM with one Switch.
When using the main switch to scan from device to device the switch is, in effect, carrying out two
separate functions and the unit cannot know which one the user intends when the switch is first
pressed. It must therefore wait until the user has released the switch to know the duration of the
press and, if it’s a short press to be directed to the device, only then can it relay it on to the device.
This leads to a slight delay which is equivalent to the duration of the press and in most cases will not
be noticeable. Figure 1 illustrates the effect:
Should the delay lead to difficulties, using FREEDOM in two switch mode is the solution, since this
eliminates the delay.
Figure 1: Effect of main switch press < Scan Time
Main switch input
Duration = t
Duration = t
Resulting output
to device
