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Spare parts spare parts, the DCS control system of PLC system and the robot system spare parts,

Brand advantage: Allen Bradley, BentlyNevada, ABB, Emerson Ovation, Honeywell DCS, Rockwell ICS Triplex, FOXBORO, Schneider PLC, GE Fanuc, Motorola, HIMA, TRICONEX, Prosoft etc. Various kinds of imported industrial parts

BENTLY 3500/25 149369-01 module

The central unit is a micro-controller, which controls the entire sequence and realizes the functions of the controller. Configuration data, command values and parameters are saved in a non-volatile FLASH. Four binary-coded digital inputs are used for calling up parameter sets (command values) from the memory, in which a maximum of 16 sets can be saved. A call-up activates a command value for the swivel angle, pressure and power limitation as well as ramp times for swivel angle and pressure. Further control inputs assume the following functions: “Command valid“: Enable of the parameter set addressed by the current call-up (H-active) “Enable“: Activation of control (H-active) Remark: H-active = High-active Level L-active = Low-active Level L/H edge = Low/High edge The analog command values for swivel angle, pressure and maximum power are provided via differential inputs AI7, AI5 and AI4 [3]. With a positive swivel angle command value, the pump swivels “to the left” (= direction of flow P -> B). The digital call-up command values are added to the analog command values, and the sum of both are fed via the relevant ramp generator to the input of the controller.

Closed circuit

When the axial piston pump A4VSG...HS4 is operated in the closed circuit, a valve connection block is installed between the axial piston pump A4VSG.. and proportional valve 4WRE6-2X/822. The variant of this valve connection block also depends on the pump’s direction of rotation.

When several pumps deliver fluid into a system, they have to be connected in parallel. If pressure control is to be activated for them, it is useful to apply the master/slave principle. To this end, one pump is used as master, and all the other pumps are hooked up as slaves. One pressure transducer can be connected to several control electronics. In the case of pressure sensors with current interface, the resulting load impedance must be taken into account (load impedance per control electronics 100 Ω). The voltage drop across an input is 3.5 V at 20 mA and 1.7 V at 4 mA. The master board realizes closed-loop swivel angle control as well as closed-loop pressure control and power limitation. For this, the swivel angle, pressure and power command values have to be provided accordingly. The swivel angle command value (b2) of all slave boards is to be connected to the output (d32) of the master board. For master/slave operation, the swivel angle command value (b4) of all slave boards must be connected to the output (b28) of the master board. The pressure controller must then only be adapted on the master board. The slave boards are always operated using the resulting command value of the master board.