Lindy CPU IP Access Switch Plus User Manual

The CPU IP provides a serial port for connection to one or more optional power 
control units. This allows you to control the mains power being supplied to the 
connected host(s) so that an authorised remote user can, if necessary, perform a 
complete cold reboot on a failed host system.
The control connector of the first power switch is connected, via serial cable, to 
the rear panel of the CPU IP. Any additional power switches are then connected 
via a ‘daisy-chain’ arrangement to the first power switch. Each power switch box 
is then given a unique address and access to each power port (4 or 8 ports on 
each power switch box) is gained using a combination of the switch box address 
and the port number. 

COM1

COM2

/ KVM

To connect and address the switch boxes
Note: The CPU IP can be powered on during this procedure, however, the switch 
boxes should be switched off.

1  Mount up to four switch boxes in positions where they are close to the 

computers that they will control and not too distant from the CPU IP 
(preferably within 2.5 metres).

2  Use a serial cable with an RJ10 and a 9-pin D-type connector (see 

 for specification). Connect the RJ10 plug to the socket marked ‘IN’ on the 

first switch box. Connect the other end to the socket marked ‘COM2’ on 
the CPU IP. 

8

IN

IN

IN

IN

OUT

OUT

OUT

8

8

8

7

7

7

7

6

6

6

6

5

5

5

5

4

4

4

4

3

3

3

3

2

2

2

2

1

1

1

1

IP

The power ports are connected to the power inputs of each computer and the 
power switch box(es) are then connected to a mains power supply.
IMPORTANT: Power switching devices have a maximum current rating. It is 
essential to ensure that the total current drawn by the equipment connected 
to the power switching device does not exceed the current rating of the power 
switching device. You must also ensure that the current drawn from any mains 
socket does not exceed the current rating of the mains socket.
Setting up, configuring and using power switching requires three main steps:

•  Connect and address the switch boxes 

ð

•  

•  

3  For each of the remaining switch boxes (if used), use a serial cable with RJ10 

end to the socket marked ‘OUT’ of the previous box and the other end to 
the socket marked ‘IN’ of the next box. 

4  Set the addressing switches on each switch box using the micro switches 

according to the switch box manual.

5  Connect IEC to IEC power leads between each port and the power input 

socket of each computer that requires power switching. Carefully note to 
which power ports, on which boxes, each computer is connected. If server 
systems have multiple power inputs, then each input must be connected via 
separate ports, which can be on the same, or different boxes.

6  Connect each box to a suitable mains power input. 

Now proceed to the configuration stage covered in the 

 section within the Configuration chapter.