Farnell TOPS 3D - Page 11

The 6V 4A output is controlled over the range 4 to 6 volts by the
'voltage adjust pot.. The output can be turned on /off by the
switch to the left of the terminals. The SCR overvoltage crowbar
is permanently attached to the output terminals even with the
'output' switch in the 'off' position, so that the switch can be used
to reset the crowbar.
With the output switch in the 'on' position the 'overload' led will
be illuminated if 1) the current demand exceeds 4 amps, 2) the
SCR crowbar has triggered or 3) the output is in the foldback
state.
The + 17 and -17V outputs track one another and are controlled
by a single 10 turn potentiometer over the range 5V to 17 volts.
Both outputs which share a common 0' terminal can be switched
on or off independently by the appropriate switches. Each switch
incorporates an overload LED which illuminates should the current
demand exceed 1 amp.
7