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Page 39 of 47
External Alarms
The DB9 connector at the TOP of the connector panel has pins for external alarms. Alarms are
Normally On, dry contacts, which means the GroBot supplies power, and all you have to do is provide
a switch or relay that’s closed when things are good. This way, cutting a wire of unplugging a device
will trigger an alarm. Especially good for glass break sensors and door switches!
The connector pinout is:
Pin
Function
1
Alarm 1
2
Alarm 2
3
Alarm 3
4
Alarm 4
5
Alarm 5
6
Alarm 6
7
Alarm 7
8
Alarm 8
9
+6.0 Volts DC
Alarms are enabled and disabled by clicking on the Lock icon on the GroBot home page. If an alarm
trips, the GroBot will send you an email telling you about it.
External Pump Rack Cable
Your GroBot EVO comes with four (4) integrated dosing containers. If you want to connect another
External Pump Rack, you can order one from PurGro and it that comes with a standard cable 10 foot
long flexible cable. Should you decide to make or lengthen your cable, use #20 AWG (or larger)
stranded wire. Pinouts are below.
Pin
Function
2
Pump 5
3
Pump 6
4
Pump 7
5
Pump 8
6
+6.0 Volts DC
If you order a cable from Frye’s or CablesToGo or similar, we recommend wiring ALL pins just to
avoid confusion on the tech’s part. It’s simpler for all concerned.
Just tell them: “All pins, straight through, #18 or #20 AWG stranded. No shield is needed.”