8
Power supply (use is optional)
The AdderView Prism is supplied with a power supply and an appropriate
country-specific IEC power cord. There is no on/off switch so operation begins as
soon as the power supply is connected.
The use of the power supply is optional because the AdderView Prism can also
derive its power from the keyboard port of the host system or KVM switch.
Where up to four standard keyboards and mice are connected to the AdderView
Prism (and standard length cables are used), it is usually possible to power the
AdderView Prism purely from the host system or KVM switch. See opposite for
more information.
IMPORTANT: If the power supply will NOT be used, click switch 1 on the front
panel down to its ON position. See
Configuration switches - Power source
selection (switch 1)
for more information).
To connect the power supply
1 Connect the low voltage output connector from the power supply unit to
the power socket on the front panel of the AdderView Prism.
Indoor use on
ly
5V
1
ON 2
3
4
5
6
7
8
OPTIONS
1.5A
2 Connect the IEC connector of the supplied country-specific power cord to
the socket of the power supply.
3 Connect the power cord to a nearby main supply socket.
Do I need to use the power supply?
Thanks to smart power control, the use of the supplied external power supply is
optional for most applications because the AdderView Prism can be configured
to derive its power from the host system.
The following two main factors will determine whether you can use the
AdderView Prism with, or without the power supply:
1: Lengths of cables to host computer and to consoles
A
All
cables
2m or less
Power supply not required
B
Any
cables
2.2m or more
Power supply required
2: Power required by all connected keyboards and mice
A
Total requirement is 400mA or less*
Power supply not required
B
Total requirement is 420mA or more*
Power supply required
If
either
of the above factors meet the
B
scenario, then you need to use the
power supply.
* How to check power requirements
You can determine the overall power required by the connected keyboard and
mice by consulting their product labels. On the underside of almost all keyboard
and mice will be a label stating their power requirements.
This figure is usually represented as a voltage (e.g. 5V) and a current (e.g.
20mA).
• Most standard keyboards require around 50mA
• Most standard mice require around 20 - 25mA.
Add up the total current requirements for all connected devices. If the total
value is 400mA or less then you do not need to use the power supply (subject to
the cable lengths being 2m or shorter).
