EC20300 -- GENERAL INFORMATION APPLICATION: The EC20300 conveniently interfaces a PLC or transducer with a proportional solenoid. DESCRIPTION: The EC20300 has been designed to meet the various requirements of mobile and industrial hydraulic control applications. EC20300 controls are versatile, cost effective and easily integrated into new or pre-existing designs. Much of this is a result of the unique ability each card has to accept 4 different signals. The EC20300 can accept any of the following input types: Potentiometer, 0-10V, 0-5V, or 4-20mA. The control takes these signals and converts them into a PWM output suitable for a Brand EFC-Series valve or other proportional valves that meet the proper specifications.

EC20300 -- GENERAL SPECIFICATIONS
Voltage Supply	12-30 VDC
PWM Output Current	2.0 Amps Max Continuous
PWM Output Frequency	107Hz +/- 5 Hertz
Environmental Ratings	IP66 / NEMA 4
Operating Temperature	-40°C - 85°C (-40°F - 185°F)
Storage Temperature	-40°C - 85°C (-40°F - 185°F)

EC20300 -- INPUT SPECIFICATIONS
Potentiometer
Wiper Input Impedance	10K Ohms
Wiper Input range	0-10V
Potentiometer guidelines
Resistance	2K-10K Ohms
Minimum Power rating	1/8th Watt
0-10 Volt Input	Terminal block 2, Pin 9
Input Impedance	10K Ohms
Step response	Output current will equal: ((Input voltage x 0.1) (max current - min current)) + (min current) For every volt of input, output will change 1/10 its full range.
0-5 Volt Input	Terminal block 2, Pin 10
Input Impedance	10K Ohms
Step response	Output current will equal: ((Input voltage x 0.2) (max current - min current)) + (min current) For every volt of input, output will change 1/5 its full range.
4-20mA Input	Terminal block 2, Pin 11
Input Impedance	250 Ohms
Step response	Output current will equal: ((Input current - 4mA) (0.0625) (max current - min current)) + (min current) For every milliamp of input, output will change 1/16 its full range.
Enable Input	When Enable is left open (high) the unit is operational. When the enable line is connected to ground (low) the board output immediately goes to 0 Amps.
Input Impedance	Greater than 1M Ohms
High state EN pin voltage	1.04V +/- 0.1V, Reading taken with a 40M Ohm Load
Source current while pulled low	5.11uA
Ramping Enable Input	When Enable is left open (high) the unit is operational. When the enable line is connected to ground (low) the board output ramps down to the minimum output setting at the rate set by ramp adjustments.
Input Impedance	5.444K Ohms
High state REN pin voltage	5.98V +/- 0.15V Reading taken with a 40M Ohm Load
Source current while pulled low	5.11uA
Solid State Outputs (A & B) Input Specifications	A and B outputs are activated by applying power to the A on or the B on inputs located on Terminal Block 2, Pins 4 and 5.
Input Impedance	Greater than 20K Ohms
Output Off Input Voltage Range	0.0 – 1.1V
Output Undetermined (Unstable)	1.1 – 6.0V Caution, avoid input voltages that fall within this range.
Output On Input Voltage Range	6.0 – 30V
Solid State Outputs (A & B) Output Specifications	Terminal block 1, Pin 4 and Pin 5
Switched DC Output Current	2.5 Amps Max Continuous Each Output (A and B)
Switched DC Output Voltage	Voltage Out = Voltage Supply – 0.7 Volts

EC20300 -- ADJUSTMENTS
Minimum output or zero setting	Clockwise rotation increases minimum output 0 - 1.5 Amps
Maximum output	Clockwise rotation increases maximum output 0.05 - 2 Amps Maximum output will always be 50 mA greater then the minimum output
Ramping Down, or Fall Time	Clockwise rotation increases ramp time 0.1 - 12 Seconds
Ramping Up, or Rise Time	Clockwise rotation increases ramp time 0.1 - 12 Seconds

ADJUSTMENT PROCEDURES:

Adjustments are made by turning a trim pot screw. The trimmers are 25 turn, end to end devices. The trimmers have a built in slip clutches so over rotations do not damage them. It may be necessary to turn the adjustment screw several turns to observe a change in output. Start by adjusting the min output, and then adjust the max output to the desired level. The best way to fine tune adjustments is to observe the function response or speed. It is important to make adjustments in the following order.

1. Minimum output: Start by setting the master Potentiometer or input signal to zero. Turn the trimmer clockwise until the function begins to move. Now turn the trimmer back counter clockwise, one full rotation past the point of any visible movement.

2. Maximum output: Start by setting the master Potentiometer to the 100 position on the dial. Turn the trim pot counter clockwise to decrease function speed. Turn the trim pot clockwise to increase function speed. Function maximum speed will be limited to the max flow capabilities of your hydraulic system. Do not rotate the trim pot past the point of an observable increase in function speed.

3. Ramp up: This feature changes how quickly the valve can open. Clockwise turns increase the amount of delay. Counterclockwise turns decrease the amount of delay.

4. Ramp down: This Feature changes how quickly the valve can close. Clockwise turns increase the amount of delay. Counterclockwise turns decrease the amount of delay. Use discretion when making this adjustment, this will affect how quickly your function stops.

NOTE: Brand Hydraulics recommends a 10 amp fuse be placed within 18 inches of this controls power source. The fuse and power source are customer supplied parts. Also, ensure that all unused wires are capped, and electrically isolated from each other and ground.

Contents ©2003 BRAND HYDRAULICS. All Rights Reserved.

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