High Country Tek DVC80 - Manual (Page 10)

P/N: 021-00154, Rev. A.6 - updated for V4.7 Tools Page | 10
1.3 DVC7 Introduction
The DVC7 Programmable Valve Controller is the latest addition to the DVC family of modules. The DVC7 is
designed to be a low cost subsystem controller. The low cost DVC7 has enough processing power and input
output functionality to support a wide range of hydraulic applications. Should more capability be needed than
provided by a single DVC7, multiple interconnected DVC7s or the DVC5/10 and the DVC expansion modules
can be used.
The DVC7 comes in one version. It supports the RS232 connected D206 Graphical Display or DVC61 text
display or a handheld DP04 Pendant. The RS232 port on the DVC7 is used for loading and monitoring your
application program. Four light emitting diodes (LEDs) mounted around the connector on the DVC7 module
also are useful for monitoring your system’s execution.
The DVC7 has 3 Universal inputs (programmable to accept the most common sensor inputs), 2 analog inputs
(programmable for joysticks and potentiometers) and 3 digital/pulse inputs with digital input 1 able to be
configured as an SYSTEM ENABLE input.
New with the DVC7 and unlike the DVC5 and DVC10 the DVC7 has a single +5 volt regulated reference output
and ground. This reference can supply up to a total of 500ma of current. Multiple devices with varying current
requirements can be connected to this reference. Only the total load current of 500ma needs to be adhered
too.
In addition, the DVC7 has 6 High-Side (voltage and current sourcing) outputs and 2 PWM (pulse width
modulation) outputs for proportional and bang-bang valve control. The High-Side outputs provide +POWER
(system power typically 12-24 volts) when enabled by your program to the coils used to open or close your
valves. The PWM outputs serve two functions for proportional valve coil current closed loop control. First, they
provide the current return path from the negative side of the coil. This current is measured and compared to the
desired coil current. Given the difference between the desired and actual current the PWM pulse output duty
cycle (i.e. the percent of time current is allowed to flow through the coil) is adjusted to eliminate this error or
difference. The internal DVC7 circuitry and BIOS automatically adjust this PWM duty cycle and therefore the
effective voltage (and current) seen by the coil. This regulated valve coil current provides a constant valve
output (i.e. spool position), which is unchanged by coil resistance, connection length or power supply
fluctuations. The High-Side and PWM outputs can be used stand-alone or in conjunction with one another to
support the wide combination of valve types you may have in your system. From 2 to 8 valves depending on
the valve types can be controlled by a single DVC7. The DVC50 expansion module allows you to control more
valves if needed.
The DVC7 has four programmable LEDs two of which are located on each side of the connector. These LEDs
can be programmed in various ways depending on your application and module orientation in your system. For
instance the Module Status and Network Status LEDs can be programmed to be on either side of the connector
insuring their visibility in spite of the DVC7 orientation.
Also the DVC7 can connect to the CAN Bus via Device Net or J1939.
1.4 DVC10 Introduction
A single DVC10 module has a large number of inputs and outputs that allow it to work as a stand-alone unit or
be the main module for a large CAN Bus system with up to 14 DVC expansion modules. If your system is very
complex, additional DVC10s each controlling up to 14 expansion modules can share the CAN Bus and
communicate with other DVC10s. The RS232 port on the DVC10 is used for loading and monitoring your
application program. Light emitting diodes (LEDs) mounted on the DVC10 module and CAN Bus or RS232
connected DVC display modules can be used to monitor your system’s execution.
The DVC10 has 3 Universal inputs (programmable to accept the most common sensor inputs), 3 analog inputs
(programmable for joysticks and potentiometers) and 8 digital inputs (programmable for on/off switches).
Note: All universal and analog inputs have a corresponding Pot Reference output pin for ease of connecting or
switches.