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{scroll-pagetitle}Power{scroll-pagetitle}
h1. Typical Power Draw
The following table shows the typical power draw (in Watts) for the _FAC-2100_ under various conditions:

||Test Condition||18VDC Power||24VDC Power||28VDC Power||36VDC Power||
|Unit On, Idle (No Schema)|4.2|4.4|4.7|5.7|
|Additional Power for All
Front Panel LED On|2.8|2.8|2.8|2.8|
|Additional Power for Analog
and Digital Outputs On|0.25|0.25|0.25|0.25|
|Additional Power for 
3 Solid State Relays and
2 Mechanical Relays|1.3|1.3|1.3|1.3|
|Additional Power per mA
of Load on 28V Auxiliary Output|0.05|0.05|0.05|0.05|

h1. Power Connection Diagram
The diagram below shows the connections for powering the device.  Note that a chassis ground braid must be connected between the stud on the back of the device and an Earth/chassis grounding point to provide EMI and ESD protection.  The braid used during MIL-STD 461 EMI testing can be ordered using Fairmount Automation Part Number: 30110-015.

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{scroll-align-center}!DC Power Connection.png|border=0!
{*}Wiring the FAC-2100's DC Input Power{*}{scroll-align-center}


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*Warning:* An improperly grounded case could result in electrical shock or incorrect operation of the controller.


h1. Fuses
Each FAC-2100 has a fuse located in the rear of the device on the connector panel.  Refer to the [Parts List|PDG:Parts List (FAC2100)] section for the fuse specification and ordering information.  


h2. Auxiliary Output Power
The FAC-2100 contains a 28V isolated (from the DC input power source) output source available to power sensors, actuators, etc.  Most circular connectors on the back of the FAC-2100 contain pins that provide access to this source.  

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Note that the design of the Auxiliary Output Power source allows for multiple FAC-2100s to short together (no steering diodes are required) their power sources to provide a redundant source.  As an example, this feature can be useful when multiple controllers are reading the same powered sensor -- by connecting the Auxiliary Output Power from all controllers to the sensor it ensures that all controllers will be able to read the sensor if any or all others are offline.
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[!FA_Inclusion_Library^FAprev.png!|PDG:Grounding (FAC2100)] [!FA_Inclusion_Library^FAnext.png|PDG:align=right!|Analog Inputs (FAC2100)]
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