64
Andover Controls
I/O x
330
II
I/O Channel (same for all 20 channels)
24V
500mA
Resettable
Fuse
Input/Output Circuitry
The following is a simplified schematic of each DM-20 Input/Output channel:
All 20 I/O channels resemble the circuit shown above.
The 24VDC power available to external devices includes an automatically resettable
fuse. This fuse is designed to open when an external device tries to extract more current
than is available. They reset when the current draw is back within range.
Note: In some extreme instances, the fuses may require that you remove power to
the module temporarily to reset their state.
DM-20
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