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Amtec Weather Station

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This information applies only to weather stations from Amtec. If your project has a weather station from another manufacturer,
you will need the appendix for that model.

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All weather stations come pre-configured to Modbus ID 51.

Installation: Mast and Tripod Assembly

  1. Remove tri-pod antenna from packaging.
  2. Expand tri-pod legs and insert antenna mast through hole at the top and secure nuts and bolts attached to tri-pod. ( Figure 1 )

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  3. Place NEMA enclosures flush against the antenna mast, with the bottom resting on the top supports of the tri-pod legs. Secure the top using one of the four U-bolts provided, tighten to ensure stability.  ( Figure 2 )

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  4. Attach the support arm directly above the weatherstation enclosure using two of the U-bolts provided.
  5. Remove the Temperature/Temperature and humidity device and using screws and bolts provided, attach the device in an inverted position to the
    longest of the adjacent sides of the support arm.

  6. (SEE ARM DIAGRAM ON RIGHT FOR REFERENCE)
    Approximately 5” from the top of the enclosure is the optimum placement for the bottom of the support arm. Use the other two U-bolts provided to secure the arm directly to the mast via the longer of the adjacent sides (the same side the temperature sensor is attached to, only mounted internally within the enclosure)

  7. Next attach the Pyranometer to the top of the support arm, assuring alignment with the three mounting holes on the arm and the sensor itself. Attach using bolts and nuts provided.

Configuration

  1. It is important that each Modbus device on a single network must have a unique address before the device is connected to the Modbus RS485 network.
  2. In the case of the Weather Station, the I/O modules come preconfigured with a Modbus address of 51 and 52 if a second module is needed. As these are somewhat unique addresses there should be little if any instances where a change in addressing is needed. If however Modbus addresses 51 or 52 are already in use, follow step 3 below for alteration.

  3. The Modbus address given is important to remember as this is the way to initially identify the device via the master. Therefore use the following guide
    for altering the addresses via a dip switch:

    The Dip Switches are activated by moving them into the ON position as noted on the devices. The sum of the value of the dipswitches is the address.
    In the below examples Modbus address 1 is set by simply turning switch 1 to the ON position, whereas Modbus address 40 is set by placing switch 4 and 6 to the ON position

  4. The following are the default factory settings for the Modhoppers:

    • Modbus Address Dip Switch 1,3,6, and 7 ON
    • Modbus Address Dip Switch 2,4,5, and 8 OFF
    • Modbus Channel 1,2, and 3 OFF -Channel 0 
    (If integrating with an existing Modhopper subsystem ensure that both devices are on the same channel to ensure communication).

    • All other dipswitches should be left in the off position
    The A8332-8F2D module only has 7 dipswitches which allow up to 128 possible Modbus addresses.

Wiring Instructions

The devices within (I/O and Power Supply) come pre wired and configured. The installer will need to attach the sensors and power supply, and modify
the Modbus addressing as described in the Installations section above.

Note: the plugs attached to each of the sensors. These plugs only fit into one of the receptacles on the enclosure, eliminating the possibility of incorrect wiring.  See the below diagram showing the internal wiring of the enclosure. Users should only have to access the inside of the enclosure when first providing power and running communication lines back to the AcquiSuite.

I/O-51
IN1- Temperature (Orange)
IN2- Humidity (Blue)
IN3- Pyranometer
IN4-Cell Temperature

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