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Download CONTROL AMPLIFIER FOR EHF3
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CONTROL AMPLIFIER FOR EHF3 ECAF-FB2 This control amplifier is constructed compactly by adopting a switching power supply and can operate with a wide range of power supplies (85 to 250 VAC (50/60 Hz) and 110 to 250 VDC). FEATURES 1. The amplifier incorporates six pressure setting units and can handle multistage pressure control on up to six channels. 2. The time settings for switchover among the channels can be made independently. 3. When there are multiple flow settings using one control valve, multiplestage setting and shock relief are possible without installing external setting units. ECAF-FB2 TIME CHART SPECIFICATIONS ECAF-FB2 Power supply voltage 85 to 250 VAC, 50/60 Hz, 110 to 250 VDC External input voltage 0 to +5 V Input Voltage input 2 inputs Contact input 6 contacts (input selection command), 12 VDC, 2.4 mA Feedback input Max. gain Input impedance Rated output current Time setting adjustment range Valve/coil resistance Mass Operating temperature range Max. power consumption ON: Contact close OFF: Contact open 1 input 1A/5V 10 kΩ 1A 0.07 to 7 s (CR time constant curve) 8 Ω at 20°C 1.8 kg 0 to 50°C 40 VA Input selection commands Model The cord connecting the valve coil connection terminal to the valve coil should have a current capacity of 1 A or larger, and the voltage drop in the connection cord should be limited to within 2 V. If the SOL connection terminal is disconnected with the power on, a surge voltage is generated and it may degrade the solenoid insulation. Simultaneous selection of more than one channel may cause trouble. An input selection command should be used for each channel, independently. For the external voltage input (VIN1, VIN2), use a shielded cable. The shielded cable should be connected as specified: VIN1 to terminal No. 10 and VIN2 to terminal No. 14. (Terminal Nos. 10 and 14 are connected in the amplifier). 234 EXTERNAL VIEW AND NOMENCLATURE ECAF-FB2 Terminal Functions 1 2 3 4 5 6 7 8 9 Power switch POWER pilot lamp Input selection indicating lamps Flow setting knobs (LEVEL) Rise time setting knobs (ON TIME) Fall time setting knobs (OFF TIME) Minimum pressure setting knob (BIAS) Maximum pressure setting knob (SPAN) Ammeter Mounting Hole Dimensions 2-M3 OR Ø3.5 Terminal No. Descriptions 1 CH1 2 CH2 3 CH3 Input selection command 4 CH4 5 CH5 6 CH6 7 IN1 8 Spare 9 COM 10 OV 11 Input signal IN1 12 +5V 13 FBIN Feedback input signal 14 15 OV Output to valve 16 17 Spare 18 19 Frame ground 20 Power input 85 to 250 VAC 110 to 250 VDC 21 Terminal Connection 85 to 250 VAC 110 to 250 VDC Potentiometer for minor feedback 235 The chained line indicates shielded cable. The alternate long and short dash line indicates the current controlled type flow control valve section.