UniFlex v2
The Integrated I/O option includes a rectangular 24-pin connector on the front panel which
contains connections for the I/O pins and the output driver power. The mating connector for
this is included in the accessory kit. The mating connector is a screw-free design, only requiring
a depress of a spring button to install a wire into it or release it.
The I/O Connector
provides connections to the 17 I/O
: 12 high current driver outputs, 1 analog
output of 0-10V range, 4 inputs (digital or analog, 3.3VDC max), 2 I2C pins, output driver power,
and ground. The user should connect these pins to appropriate devices (for example, valves,
flow meters, sensors, etc.). The pin mapping of these is provided in the Interface Wiring Map
(above). The user should consult the User Manual to understand how the Interface Wiring Map
translates to Device Elements in BruControl.
22 AWG wire or equivalent should be used with the I/O connector. To install a wire, strip off ½”
(12 mm) of insulation and optionally crimp on a wire ferrule. While depressing in the
corresponding pin button, insert the wire fully until it stops, then release the pin button. To
remove a wire, depress the pin button, remove the wire, and release the pin button.
The 12 high current driver outputs in the UniFlex can power external devices (power
consumers) such as relays or solenoids. These drivers are electronic switches, and require a
power source to switch to the power consumers. This source can either be the UniFlex internal
power supply or an external, user supplied one. The internal power supply is limited to 12VDC,
1A maximum, whereas an external power supply can range 5-24 VDC, and can have as much
current capability as needed for the application, so long as the driver output current limits
(below) aren’t exceeded.
There are 3 output driver power sets of pin on the I/O Connector: Internal Power Supply Out is
on pin 1, Power Supply In is on pins 2, 3, and 14 (all three must be used simultaneously as pin as
each pin is limited to 5A), and Ground is on pin 13. Connecting the Power Supply In pins and
Power Supply Out pin via jumper wires (between pins 1 and 2) takes the internal 12V supply
power and redirects it back to the output driver channels. The combined current output of all
12 channels ON when using the internal supply power must not exceed the 1A limit.
Alternatively, an external power supply may be used by leaving pin 1 disconnected and
connecting the external power supply positive output to pins 2, 3, and 14, and ground to pin 13.
This does not affect the other channels such as the analog output or the inputs.
The limits per high current driver output pin are 2 amps per driver output pin, 5 amps per driver
output pin bank, and 12 amps total.
The following is a schematic example of Integrated I/O wiring: