Apitech Valve Drive Board

M511 Apitech Valve Drive Board Completely Independent Adjustments Current Sourcing PWM Outputs 2 Current Ranges, MID and HI 1-1500 ma PWM Current Range Independent HIA and HIB adjustments Adjustable MID and LO currents Adjustable Ramp 0-5 seconds 3 Auxiliary Outputs - 1.5 Amp Current Rating Over-Signal and Short Circuit Protected The M511 Series Valve Drive Boards are designed specifically to drive Apitech valves. The boards have five adjustments that are factory pre-set to Apitech specifications. These are as follows: Lo, Mid, HiA, HiB, and Ramp. Further adjustments can be made with five trimpots. The adjustments are totally independent of one another, making calibration much easier than on similar products. The M511 series is epoxy encapsulated for superior environmental protection. M511s are compliant with CE labeling requirements. Parameter Min Typical Max Units Operating Temperature Range -40 85 C Power Supply Minimum 8.0 VDC Maximum 32 VDC Transient Reverse Polarity 400 VDC Current at Null 30 ma Regulated Voltage Minimum 4.75 5.0 VDC Maximum 5.0 5.25 VDC Current Output 100 ma Signal Input Input Resistance 20K Ω Input Null 2.5 VDC Input (Referred to GND) 1 2.5 4 VDC Over signal Max 4.3 VDC Over signal Min 0.7 VDC Signal Range Inputs Input Type Switch to Vs for High Range Input Current 4 ma Max Input Voltage 32 V Minimum Input Voltage 6 VDC Trip Point - Reset Point - PWM Outputs Frequency 30 33 36 Hz

Frequency Tolerance 10 % Minimum Duty Cycle (Adjustable) 10 25 % Maximum Duty Cycle (Adjustable) 75 95 % Short Circuit Current Limit 1.5 Amps Voltage Drop at Max Current 2.0 2.25 VDC Max Voltage 200 V Max Reverse Voltage 32 V Linearity 1 % A and B Auxiliary Outputs Signal Trip Point A( Referred to GND) 2.8 VDC Signal Trip Point B (Referred to GND) 2.2 VDC Max Current 1.5 Amps Short Circuit Current Limit Thermal Voltage Drop at Max Current 1.5 1.6 VDC Max Voltage 200 VDC Max Reverse Voltage 32 VDC Common Auxiliary Output Signal Trip Point(Referred to GND) 2.3 2.8 VDC Max Current 1.5 Amps Short Circuit Current Limit Thermal Voltage Drop at Max Current 1.5 1.6 VDC Max Voltage 200 VDC Max Reverse Voltage 32 VDC Timing and Delays Power Up Delay (PWM Output) 100 ms Power Off Delay (PWM Output) 0 Signal On Delay (Full Scale PWM Output) 1 ms Signal Off Delay (Full Scale PWM Output) 1 ms 2 Ramp EMC Ramp Range 0 5 Sec Asymmetry 1 Sec IEC 1000-4-3 (Radiated Susceptibility) 30 V/m IEC 1000-4-6 (Conducted Susceptibility) Operational Considerations: Supply Requirements: The M511 has been designed to accept a wide range of supply voltages. The board is capable of functioning properly when supplied with a DC voltage ranging from 8 volts to 32 volts. To ensure proper operation, the ripple should be limited to less than 15% of the supply voltage. Remember that the M511-11 can source as much as 4 amps from Vs with three outputs active. Vs and GND wiring should be sized appropriately to handle this type of load.

3 Signal Input: ** The signal input is a relatively low impedance input at 20K ohms. It is generally driven with a 500 ohm potentiometer and 180 ohm resistors, connected between PT+ and PT-. This will provide a varying signal at the wiper that is equal to 2.5 Volts at center, and change between 1 VDC and 4 VDC depending on the direction of rotation. However, the input can be driven with any DC source capable of supplying 2.5 VDC at neutral, and 1 VDC for full output in the B direction, and 4 VDC for full output in the A direction. For short lead lengths, shielded cable is not required. However for longer runs in noisy environments, shielded cable is recommended. For best performance, connecting the shield at the valve drive board to ground is appropriate. PWM Outputs: The PWM outputs are voltage sourcing outputs. The outputs are implemented as a high current, bipolar (Darlington) switch connected to Vs. The PWM outputs employ a crowbar type current limit circuit to shut down the outputs above 1.5 Amps. This provides plenty of design margin for Apitech valves which generally source under 400 ma at full flow and 12 VDC. The board is designed as to provide a pulse width modulated output at 33 Hz. The pulse width can be adjusted from a duty cycle of 10 to 95 %. The PWM outputs may be tied together to form a flow control type of configuration with no adverse operational effects.

4 Linearity: The input voltage vs. output duty cycle is excellent over all operating conditions. M511 input vs. output linearity 1.5 1 0.5 signal voltage 0-0.5-1 -1.5 75 72 70 67 64 61 58 56 52 49 46 44 41 38 34 0 34 37 40 43 46 49 52 55 57 60 63 66 69 72 74 duty cycle RDC MID Range: Ramp: As the output duty cycle is changed by the HI potentiometer, there is a second selectable gain range, called MID. MID operates exactly like the HI pot, when the HI ENABLE input is not connected to Vs. If HI ENABLE is connected to Vs, the output will range between the LO trim pot setting, and the HI trim pot setting. When the HI ENABLE is not connected to Vs, the output will range between the LO trim pot setting and the MID trim pot setting. The HI ENABLE input basically selects the gain of the valve drive board as set by the trim pots. This allow the user to have a coarse and a fine control of the output. Ramp is basically a limiting of the bandwidth of the signal channel. When ramp is set to off, the output responds immediately to the input signal. When ramp is set to the maximum setting, the output will take 5 seconds to ramp from the LO set point to the HI set point, or the MID set point, depending on which range is selected. However, if the HI ENABLE input changes state while the valve drive board is generating a PWM signal, the output will immediately seek the new output value, regardless of ramp value. The graph below shows the ramp linearity and symmetry:

5 DATA 1 2902 5 VOLT SUPPLY 5/14/97 3.5 3 2.5 2 1.5 1 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 VOLTAGE SECONDS HIA and HIB: PT+ and PT-:** Making Adjustments: Auxiliary Outputs: The valve drive board has independent HI adjustments for the A direction and the B direction. The PT+ and PT- outputs are intended to be connected to a 500 ohm potentiometer and 180 ohm resistors. PT+ is connected internally to 5 volts. The PT- is connected to GND. When connected across a 500 ohm network, the voltage at PT+ will provide full signal output in the A direction, and the voltage at PT- will cause full signal output in the B direction. The trim pots exhibit an extremely low dependence on one another. While the most of the trip pots are completely independent of each other, the LO pot does cause a minor change in the HI settings. For this reason, it is prudent to set the LO trim pot first and then set the others. The Auxiliary outputs are protected with a thermal shutdown technique. In the event of a short circuit, the output will not reset to normal operation unless the short has been removed, and either the power cycled or the joystick returns to neutral.

6 Dimensions: All Mounting holes are #6 clearance holes, in 4 places. Brackets are available for vertical mounting of assembly. P/N B-08553 is a bracket that picks up the four mounting holes of the valve drive board and converts them for mounting the assembly standing up. The bracket is shown below: Mating Connectors: The connector used on the M511 series is a PCD #ELFH11210. There are a range of mating connectors available from PCD, Phoenix Contact, Beau, LMI, AMP and Weimeuller. P-Q Controls can supply a limited selection of mating PCD connectors at an additional charge. P-Q part number A-09014-11 for 11 position connector.

7 Ordering Information: **M511 **M511IND No Lead Protection, Potentiometer Command With Lead Protection, Potentiometer Network Command, Model 212, 215 & 220 Controlled STANDARD WHEN USED WITH P-Q CONTROLS JOYSTICKS M511IND-XX-X Auxiliary Output Options Mid Range 02 none M Mid Range 03 A and B Auxiliary 10 Common Auxiliary 11 Common, A and B Auxiliaries Revised for the Sales Dept Rev B. 8/02/2001, HGK M511 VDB Specifications.doc

8 Typical Connections: M511 IND M511