Harman Martin VC-Feeder, User Manual

Safety information

5

PROTECTION FROM ELECTRIC SHOCK

• Follow carefully the directions given in the user manuals of all the 

devices that you intend to connect to the VC-Feeder, particularly the 
instructions, warnings and limits that apply to:
- system layout,
- connections to other devices,
- specified cables,
- maximum cable lengths, and 
- maximum number of devices that can be connected.

• The VC-Feeder accepts input power at 48 VDC nominal via its 

combined power/data input connector marked IN. Do not supply it with 
power at any other voltage.

• The VC-Feeder can relay power at 48 VDC nominal via its throughput 

connector marked THRU. Connect only devices that accept 48 VDC to 
the THRU connector.

• The VC-Feeder can supply power at 15 VDC nominal via its combined 

power/data output connector marked OUT. Connect only devices that 
accept 15 VDC to the THRU connector.

• A linked chain that consists of one or more VC-Feeders plus display 

devices can draw a safe maximum total current of 7.5 A. Do not create 
an interconnected chain of devices with a total combined current draw 
that exceeds this 7.5 A limit.

If the device used to supply the chain with DC power has a maximum 
current rating that is less than 7.5 A, it is the device’s maximum current 
rating that determines the maximum current for the chain. For example, 
the Martin Tripix Power IP66™ has a maximum current rating of 5 A. If 
you use the Tripix Power IP66 to supply a chain with DC power, do not 
create an interconnected chain of devices with a total combined current 
draw that exceeds 5 A.

This means that if the total current draw of a chain of devices has 
reached 

either

 the maximum current rating for the PSU output 

or

 7.5 A 

– 

whichever of these two figures is lower

 – you must begin a new 

chain that is connected to a new PSU output if you need to supply 
power to more devices.

If you take off DC power at the end of a chain of VC-Feeders, include 
the current draw of any additional devices in the current draw of the 
chain and do not exceed the maximum limits given above.

• Use only the cables specified by Martin™ for the devices concerned to 

interconnect them. Do not exceed the maximum lengths for cable runs 
specified in this manual and in display device user manuals. If the 
specified cables are not long enough for an intended cable run, consult 
Martin™ for assistance in finding or creating a safe alternative cable.