The diagram below shows the power supply connection to WEC1. Power to WEC can be from 12-24 Volts. A 12VDC adapter is supplied as a standard accessory. The digital inputs shown are dry contacts type. The 4 outputs are relay types with contact ratings of 30V, 2 amps DC max.  Also shown in this figure are four 4-20mA transmitters, 2-wire loop powered. Depending on the power requirement of the transmitter, a higher voltage may be needed.  In this case, change the power supply to a higher voltage type, but not higher than 30 volts.

The diagram below shows the wiring of WEC1 having a separate power supply for the analog inputs. In cases where the 4-20mA transmitters require an operating voltage of higher than 24 volts, this configuration is recommended. This figure also shows how to interface voltage source digital inputs. The example here shows that input X1, X2, X7, X8 are voltage source inputs. X3, X4, X5, X6 are dry contact inputs. Users can use dry contact or voltage source for any or all the inputs.

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Automatically Trigger Output
This feature will trigger and close the contact of Relay Output Y4 (WEC1) or Relay Output Y2 (WEC2) on alarm state. Whenever Digital Input changes from Normal to Alarm state or when Analog Input hits the alarm preset value. This allows external alarm for example a beacon or siren to trigger ON when any alarm detection.

The four channels of 4-20mA analog input interfaces to any industrial standards transmitter . Any such transmitters can be used with WEC1 to monitor temperature, humidity, pressure, current, voltage, power, etc. User can input the analog input settings according to the sensor's specification. The example below shows the Temperature Sensor (TS-70) and Humidity Sensor (HS-100) connection to A1 and A3 respectively. The user is able to query the analog readings as and when needed via SMS.

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