Interface Assemblies

MEGA UniShield

BruControl MEGA Format UniShield – Model UM-1
This is a shield for MEGA format interfaces such as the Arduino MEGA, AdaFruit Grand Central, Arduino Due, or other MEGA format interface microcontrollers. It is a stacked design, containing a base board for I/O and a riser board for the interface. These are connected by ribbon cable, allowing for native shields to be used on top. It also contains an on-board 3 amp DC-DC buck converter to reduce the need for multiple power supplies on the control panel. The buck converter can be powered with 12 or 24 VDC and its output is adjustable from 3 to 12 VDC. It’s output can be switched to either supply the interface via its VIN pin (for example 6 – 9 VDC), supply the 5V pin directly (thereby bypassing the interface’s 5 V regulator to prevent an overheating regulator), or to supply an on-board terminal, creating a discrete DC-DC converter which can be used for other devices such as flow-meters, RTD-amplifiers, etc.

The base board contains 48 high-current outputs which are split into four banks, enabling each bank to be powered by different sources (e.g. 5, 12, 24 VDC). The current outputs limits are: 2.5 amps per output, 6 amps per driver (4 outputs each), 12 amps per bank (4 banks). This will eliminate the need for electro-mechanical relays to switch low-current DC. Therefore, contactors, valves, relays, DC pumps can be powered directly. This should reduce panel space and simplify wiring, reducing panel size and overall cost. PWM functions at up to 1000 Hz, enabling a DC pump without any additional hardware. The output drivers are fault tolerant – for example, will not be damaged by an accidental short-circuit.

Each I/O terminal set includes a high-current driver output and a “direct” pin, allowing for digital inputs. Fly-back diodes are included on driver outputs to damp inductive loads such as solenoids and relays, and reduce potential electrical noise. Drivers are enabled by default, but switches are included for all driver outputs to disable them.

The UniShield includes on-board pull-up resistors for I2C and 1-wire, so external devices such as 1-wire temperature sensors can be wired directly. It also contains terminals for power, analog inputs, SPI, I2C, AREF, grounds, and includes an extra reset button. The unit includes a DIN carrier for universal mounting.

The UniShield includes either an Arduino MEGA-2560 compatible interface or an AdaFruit Grand Central M4 (depending on the model), and has the current-version firmware loaded. Ethernet or Wi-Fi shields are also available options. Assembly is 152 x 87 x 65 mm (L x W x H).

Read the UM-1 Product Note for more details, configuration, and installation.

UM-1-G
  1. Model UM-1-M: MEGA UniShield, with MEGA-2560 interface: $359 US
  2. Model UM-1-G: MEGA UniShield, with AdaFruit Grand Central interface: $395 US
  3. Model UM-1-MW: MEGA UniShield, with MEGA-2560 interface and Wi-Fi w/external antenna: $389 US
  4. Model UM-1-GW: MEGA UniShield, with AdaFruit Grand Central interface and Wi-Fi w/external antenna: $425 US
  5. Model UM-1-ME: MEGA UniShield, with MEGA-2560 interface and integrated Ethernet: $389 US
  6. Model UM-1-GE: MEGA UniShield, with AdaFruit Grand Central interface and Ethernet shield: $425 US

BruControl ESP32 Format UniShield – Model UU-1-E
This is a shield for the ESP32 Development Board format interface. It is a stacked design, containing a base board for I/O and a riser board for the interface. The ESP32 Development board (included) plugs on top of the riser board and can easily be replaced. The riser and base boards are connected by ribbon cable for efficient packaging. It contains an on-board 3-amp DC:DC power supply (DDPS) to reduce the need for multiple power supplies in the control panel. The DDPS can be powered with 12 or 24 VDC and its output is adjustable from 3 to 12 VDC. It’s output can be switched to either supply the interface via its 5V pin or supply the inteface with 3.3V directly (thereby bypassing the interface’s 5 V regulator), or to supply an on-board terminal, creating a discrete DC-DC converter which can be used for other devices such as flow-meters, RTD-amplifiers, etc.

The base board contains 24 high-current outputs (20 are usable with the ESP32) which are split into two banks, enabling each bank to be powered by different sources (e.g. 5, 12, 24 VDC). The current outputs limits are: 3 amps per output, 6 amps per driver (4 outputs each), 15 amps per bank (2 banks). This will eliminate the need for electro-mechanical relays to switch low-current DC. Therefore, contactors, valves, relays, DC pumps can be powered directly. This should reduce panel space and simplify wiring, reducing panel size and overall cost. PWM functions at up to 1000 Hz, enabling a DC pump without any additional hardware. The output drivers are fault tolerant – for example, will not be damaged by an accidental short-circuit.

Each I/O terminal set includes a high-current driver output and a “direct” pin, allowing for devices to be connected directly to the interface pin. Fly-back diodes are included on driver outputs to damp inductive loads such as solenoids and relays to reduce potential electrical noise. Output drivers are enabled by default, but switches are included for each to disable them.

The UniShield includes on-board pull-up resistors for I2C and 1-wire, so external devices such as 1-wire temperature sensors can be easily wired. The unit is housed in a DIN carrier for easy and universal mounting.

The UniShield comes assembled and tested with an ESP32 interface and pre-loaded firmware. Choices include internal (on-board) or external antenna . Assembly is 92 x 87 x 58 mm (L x W x H).

Read the UUE-1 Product Note for more details, configuration, and installation. Also, here is a Close Look overview video:

UU-1E
  1. Model UU-1-EX: ESP32 UniShield, with interface and external antenna: $289 US
  2. Model UU-1-EW: ESP32 UniShield, with interface (on-board antenna): $279 US

Arduino MEGA 2560 w/ Screw Shield – Model AM
This assembled shield & interface saves the user from having to source multiple parts and assemble/solder the Screw Shield terminals and headers. Note that unlike the UniShield models above, this assembly does not have output drivers. It breaks out the native interface pins to screw terminals for ease of wiring, but current and voltage on these pins must remain within limits of the interface micro-controller.

AM-SD
AM-SD
AM-FD
  1. Model AM-SD: MEGA, Screw Shield, DIN clips. Use with Serial: $92 US
  2. Model AM-FD: MEGA, Screw Shield, Ethernet 2 shield, DIN clips: $139 US
  3. Model AM-WD: MEGA, Screw Shield, Wi-Fi shield w/internal antenna, DIN clips: $139 US
  4. Model AM-XD: MEGA, Screw Shield, Wi-Fi shield with external antenna, DIN clips: $149 US

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