Description Component series 2X Easy valve selection of the Rexroth valves for the industrial hydraulics Characteristic curves of the valves stored in the device Valve optimization via push-buttons All valve parameters adjustable Features For explosion-protected valves with one or two solenoids Not in accordance with the Explosion Protection Directive 2014/34/EU Command value input 0 ... ±10 V Reverse polarity protection of the operating voltage Ramp generator up and down is separately adjustable Zero point setting Command value adjustment Characteristic curve generator Clocked power output stage Output short-circuit-proof LED status displays Measuring sockets for: actual current value, internal current command/setting Product description General The valve amplifiers are intended for assembly on top hat rails. The electrical connection is established via 3 tension spring plug-in connectors. The supply voltage is 24 VDC. Power supply unit (1) The internal power supply unit has a making current limiter to prevent current peaks. Additionally, inverse-polarity protection is integrated. Command value, command value summing device [3] The "internal command value" comprises: "External command value", connected at the input of the differential amplifier (2) Zero point offset (4), "Z/B" adjustable in the standard setup For pressure valves, a positive command value results in a pressure increase at the valve. For valve types 4W..., the following applies: Via solenoid B, a command value of 0 ... +10 V results in a flow in the valve from P to A and from B to T. Via solenoid A, a command value of 0 … -10 V results in a flow in the valve from P to B and from A to T. In the expert setup, you can invert the command value (5) (see operating instructions 30232-01-B). In normal operation, the "internal command value" can be measured at the "v" measuring socket. Ramps A ramp limits the incline of the command value. You can choose between a single ramp (6) (one time for all ramps, default value) and a 4Q/2Q ramp (7) (different times for the possible ramps). The 4Q/2Q ramp times are set in the expert setup. The characteristic curve generator (9) does not influence the ramp time. Command value attenuator "G" (8) By means of the command value attenuator, the command value can be reduced. Characteristic curve generator (9) In the characteristic curve generator, the pre-set valve characteristic curve can be adjusted to the actual hydraulic and control-technical conditions. The following can be adjusted in the expert setup: Pilot current "B" Step "S" Maximum current "G" (separately possible for solenoid A and B) Current controller (10) The solenoid current is recorded, compared to the command value in the current controller and the difference is compensated. Clock generator (11) The clock generator creates the clock frequency "f" of the output stage. With Rexroth valves, the clock frequency sometimes changes dependent on the command value and/or the operating voltage. Powe
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