Db9a pin-out – Alicat MC Series Mass Flow Controller User Manual
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Do not connect RS-485 to RS-232 units or cables. Damage will
occur! Check part number or contact factory to verify RS-485
functionality.
Due to variance in cable manufacturing, please identify proper
wiring/pins via continuity check & color when using blunt cut
multi-strand cables.
DB9A Pin-out
The following pin-out chart describes the safest and generally compatible
arrangement when connecting a non-Alicat DB9 wire to a DB9A equipped Alicat.
Not all features may be available between brands, but the common denominators
are featured in our DB9N offerings, along with some options for customization.
7641 N Business Park Dr. Tucson, AZ 85743
520-290-6060 Ph. 520-290-0109 Fax
7641 N Business Park Dr. Tucson, AZ 85743
520-290-6060 Ph. 520-290-0109 Fax
Female Connector Front View
9
9
Male Connector Front View
6
1
6
1
5
5
If your instrument was ordered with a DB9 connection, be sure to check the
Calibration Label on the device and reference the appropriate pin-out diagram.
Pin
Function
1
Not Connected
2
0-5 Vdc Output Signal (or 0-10 Vdc optional)
3
Power In (+Vdc)
4
Ground (common for power, digital communications, analog
signals and alarms)
5
Serial RS-232TX or RS-485 (+)
6
Analog Input Signal [4-20mA, 5Vdc, or 10Vdc] (short to ground
for remote tare function on non-controllers)
7
Ground (common for power, digital communications, analog
signals and alarms)
8
Ground (common for power, digital communications, analog
signals and alarms)
9
Serial RS-232RX or RS-485 (-)
Note: The above pin-out is applicable to all the flow meters and controllers
with the DB9A connector. The availability of different output signals
depends on the options ordered. Optional configurations are noted on the
unit’s calibration sheet.