Precision Digital PD6310 - Manual (Page 25)

Model PD6210 & PD6310 Batch Controllers Instruction Manual
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Figure 10: Transmitter Powered by Ext. Supply or Self-Powered
The current input is protected against current overload by a resettable
fuse. The display may or may not show a fault condition depending on
the nature of the overload.
The fuse limits the current to a safe level when it detects a fault
condition, and automatically resets itself when the fault condition is
removed.
Figure 11: Voltage Input Connections
The controller is capable of accepting any voltage from -10 VDC to
+10 VDC.