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Shorted SCR Detection (optional), cont’d.
The latching and non-latching option is jumper selectable; the jumper is located on the plug-in
shorted SCR detection board. Latching and non-latching operation by the output at J1 - 5 & 6 is
controlled by J3 on the shorted SCR detection board 0135-28096. When this jumper is installed,
latching operation is achieved. The drawing below shows the Shorted SCR Detection board.
Heat Sink Over-Temperature
An external lamp or relay may be connected to J1 - 3 & 4 (see Fig. 2 on page 21) (this must be rated
for the instrument power applied to J1 - 1 & 2). This will provide an indication to the operator that
the heat sink is approaching an unsafe temperature level. The unit will enter a shutdown mode if the
temperature continues to rise.
UNIT SHIPPED IN NON-LATCHING MODE.