M 2 M C o n t r o l
by Infranet Technologies GmbH
Ph: +49.40.69647-260
Tempowerkring 2
Fax: +49.40.69647-259
21079 Hamburg
Email:
Germany
Web: www.m2mcontrol.de
Technical Manual 1.02, C350 Professional
Page 10 of 38
Power supply
The C350 pro unit can be supplied with 8..36VDC from an external DC power source.
Positive power is applied to the SUPP pin and ground is connected to the PGND pin.
There are two SUPP pins as these also supplies the digital outputs. If the total current
consumption on the digital outputs exceeds 1A refer to digital output section for special
attention on the wiring. Otherwise one pin would be sufficient.
There are three different ground labels: Power Ground (PGND), Signal Ground (SGND)
and Analog Ground (AGND). The signal and analog grounds are filtered from the power
ground. Power ground must only be used as power supply return path. The signal ground
is used as ground reference for digital I/O’s and serial interfaces. And the analog ground is
used as a low noise analog ground reference for the analog inputs.
The C350 pro is protected against wrong polarity. If a chassis or system grounds are
connected to either SGND or AGND a wrong polarity on the supply lines will destroy the
internal GND connection. For avoidance of such a scenario a fuse can be installed on the
positive supply.
The C350 pro also contains an internal high capacity backup battery, which will supply the
unit if the external power supply should fail or be disconnected. By default the C350 is
powered down when a power fail occur. This setting however can be changed. Please
consult theM2M Control IDE on-line help for more information. The display will
automatically turn off when external power is removed.
When the wakeup/ignition input is activated with a logical high, the C350 pro unit will wake
up if it was in power down mode.
Please Note:
•
Minimum 12VDC supply is necessary for 0-10V analog output configuration.
•
Minimum 16VDC supply is necessary for digital inputs 1-4 to work as S0 compliant
inputs.
Power supply pins.
Pin
Name
Description
27 PGND
Power
ground
28
SUPP
Power supply, positive (+) connection
29
SUPP
Power supply, positive (+) connection
