Echelon DM-21 Device Manager - Manual (Page 49)

Device Manager User’s Guide 4-9
Subsystem 8 + 5VDC GND GND GND
Subsystem 9 + 5VDC GND GND + 5VDC
Subsystem 10 + 5VDC GND + 5VDC GND
Subsystem 11 + 5VDC GND + 5VDC + 5VDC
Subsystem 12 + 5VDC + 5VDC GND GND
Subsystem 13 + 5VDC + 5VDC GND + 5VDC
Subsystem 14 + 5VDC + 5VDC + 5VDC GND
Subsystem 15 + 5VDC + 5VDC + 5VDC + 5VDC
Reset Circuit
The Device Managers incorporate an internal reset circuit. External resets to the
Device Manager are accomplished by cycling power to the module.
Service Pin Circuit
The Device Managers incorporate a front panel service switch and yellow service
LED. Additionally, ~Service is provided as an external signal. An external service
switch and LED may be added provided that the total current draw does not
exceed 20mA.
Power/Wink LED
The Device Managers incorporate a front panel combination Power/Wink LED
that is driven by the Neuron 3150 Chip.
Status LED
The Device Managers provide a status LED that flashes in a predefined pattern
to identify the health and activity of the module. The number of flashes of the
status LED specifies the current state of the Device Manager as shown in table
4.6.