Savant GPIO Trigger and Sense - How and when to use these!

This article is designed to explain the functions of the GPIO ports on any of the Savant products. Lets start with some basic information provided by Savant:

Input:The maximum GPIO input voltage is 28 VDC.

Output:A single GPIO port outputs a voltage from 3-12 VDC with a maximum current of 10mA when the voltage is at 3V, and 50mA or 150mA (depending on the CPU board) when the voltage is at 12 VDC.

 

This information does not describe which systems are able to provide 50mA@12vDC and which systems can provide 150mA@12vDC. So here is a table of Savant devices and what their GPIO ports are capable of doing:

 

-System 12, 24 & 36
  with the MainBoard Hardware revision of 29 and bellow
 

GPIO port 1-7 at 12vDC provides a max current of 50mA

 

-System 12, 24 & 36 
  with the MainBoard Hardware revision of 30 and above

-SSP-0600,1200, 2400 (all models)  
 

GPIO port 1-2 at 12vDC provides a max current of 150mA

GPIO port 3-7 at 12vDC provides a max current of 50mA

 

-RSC-0025
 

GPIO port 1-7 at 12vDC provides a max current of 10mA

 

-SSA
-SSM
-SSV
-SSC-0025
 

GPIO port(s) at 12vDC provides a max current of 150mA


GPIO Sense usage

Sence.png Sence_Lib.png
GPIO Sense Placed Component GPIO Sense Library Component

Here is how the GPIO Sense can work in the Savant System:

If you have a 'Dry Contact Closure', say from a Door Bell, You wire this directly into the Common/Ground, and GPIO Port number. This will cause the State in state centre to go from High to Low (1 to 0) when the contact is closed (door bell pressed). 

Here is what State Center looks like with the different Contact states:

Trig_State_High.png RelayOpen.png
  Relay Open
Trig_State_Low.png RelayClosed.png
  Relay Closed

 

GPIO Trigger usage

Trigger High.pngTrigger_Low.png GPIO Trigger.png
GPIO Trigger Placed Component GPIO Trigger Library Components

There are two different uses for the GPIO triggers:

GPIO High

This is used for devices that require a 12vDC feed to 'trigger' on. When this port is powered off, there is no voltage available. When the port is powered on there is 12vDC constant (depending on the attached wire: weight, length etc.). 


GPIO Low

This is used for devices that require a 0vDC feed to 'trigger' on. When this port is powered off there is 12vDC constant (depending on the attached wire: weight, length etc.). When the port is powered on there is 0vDC available. 

You wire the GPIO trigger (Both High and Low) in the following way:

Positive > GPIO port number 
Negative > Common/Ground
Have more questions? Submit a request

0 Comments

Please sign in to leave a comment.