What are these at PSU output

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Hi,
What are these at output of TUNS500 PSU module power supply (attached)

Also, what if S+ and S- are not connected to +vout and -vout.....?.....and you start it up.....will it hit overvoltage and shut down?......or will it literally be damaged?

TUNS500 instruction manual page 7 calls for a 4.7 to 22r resistor as inrush limitation to a HV bus cap of 390-2000uF!....isnt that going to need relay switch out....or be very big. This is a 480W PSU, with vac in of 100-265vac.

Why doesnt it show a schem of the S+/S- connection to vout?

TUNS500F | Product Info. | COSEL Co., Ltd.

Features of TUNS500F. Can see an Item lineup of TUNS500F.
en.cosel.co.jp
 

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Apparently jumper bridging source and sense terminals. Relation to TUNS500 is unclear, the photo doesn't show a module power supply.
 
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Also, what if S+ and S- are not connected to +vout and -vout.....?.....and you start it up.....will it hit overvoltage and shut down?......or will it literally be damaged?
Click to expand...

If they are linking the output and sense connections, and I can't see where it relates to TUNS500F either, it would be very unusual if there wasn't a resistor in parallel to the sense link. The whole idea behind remote sensing is that the sense input draws minimal current so there is insignificant drop between it and the load so with a high impedance input, a resistor with much higher value than sense wiring would normally bridge them already.
Removing a sense link (which would ideally be at the load end of the output wiring) would normally just let the internal resistor take over. The voltage would remain fairly steady but the wiring losses would no longer be compensated.

Brian.
 
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