SIGNAL SPECIFICATIONS
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Atos digital controllers are CE marked according to the applicable directives (e.g. Immunity/Emission EMC Directive).
Installation, wirings and start-up procedures must be performed according to the prescriptions shown in table F003 and in the user manuals included in
the Z-SW programming software.
The electrical signals of the controller (e.g. monitor signals) must not be directly used to activate safety functions, like to switch-ON/OFF the machine’s
safety components, as prescribed by the European standards.
11.1 Power supply and wirings (V+ and V0)
The power supply must be appropriately stabilized or rectified and filtered: apply at least a 10000 mF/40 V capacitance to single phase rectifiers or a
4700 mF/40 V capacitance to three phase rectifiers.
The controller is protected against overloads by a internal safety fuse: 3,15 A fuse.
11.2 Position reference input signal (P_INPUT+, P_INPUT-)
The controller allows to regulate the axis position in closed loop according to an external voltage or current reference input signal (P_INPUT+ and
P_INPUT-), see 3.1. The analog input is a differential input type.
The input range and polarity are software selectable within the maximum range ±10 V
DC for voltage or 0 ÷ 20 mA for current; default setting is 0 ÷ 10 VDC.
Controller with fieldbus interface (-BC or -BP) can be software set to receive reference value directly by the machine electronic control unit (fieldbus
master); in this case the analog reference input signal can be used for start-up and maintenance operations.
11.3 Pressure or force reference input signals (F_INPUT+, F_INPUT-)
For alternated position/force (or position/pressure) control the Z-ME-KZ receives a second analog voltage or current reference input signal
(F_INPUT+,F_INPUT-) dedicated to the force (or pressure) closed loop control (see section ).The analog input is a differential input type.
The input range and polarity are software selectable within the maximum range ±10 V
DC for voltage or 0 ÷ 20 mA for current; default setting is 0 ÷ 10 VDC.
Controller with fieldbus interface (-BC or -BP) can be software set to receive reference value directly by the machine electronic control unit (fieldbus
master); in this case the analog reference input signals can be used for start-up and maintenance operations.
11.4 Position transducer input signal
A position transducer must be always directly connected to the controller: digital SSI (SSI clock+, SSI clock-, SSI data+, SSIdata-), digital Encoder
(Inc Ua1, Inc /Ua1, Inc Ua2, Inc /Ua2,Inc Ua0, Inc /Ua0), potentiometer or a generic transducer with analog interface (P_TR+, P_TR-) can be used.
For transducers with analog interface the input range and polarity are software selectable within the maximum range ±10 V
DC for voltage or 0 ÷ 20 mA for
current; default setting is 0 ÷ 10 V
DC.
Refer to position transducer characteristics to select the transducer type that maches the specific application requirements (see
7.1).
11.5 Force / pressure transducer input signal (F_TR1+, F_TR1-, F_TR2+, F_TR2-)
Analog remote pressure transducers or load cell with maximum ±10 V
DC signal range must be directly connected to the controller in case of alternated
postion/force (or position/pressure) control.
Refer to pressure/force transducer characteristics to select the transducer type that mach the specific application requirements (see
7.2).
The input range and polarity are software selectable within the maximum range ±10 V
DC for voltage or 0 ÷ 20 mA for current; default setting is 0 ÷ 10 VDC.
11.6 Analog valve monitor input signal (VALVE_MONITOR+, VALVE_MONITOR-)
The controller allows to monitor the regulation of the proportional valve which operates the hydraulic flow to the actuator (VALVE_MON+,VALVE_MON-).
The analog input is a differential input type.
The input range and polarity are software selectable within the maximum range ±10 V
DC for voltage or 0 ÷ 20 mA for current; default setting is 0 ÷ 10 VDC.
11.7 Control output signal (CONTROL_OUTPUT+)
The error signal processed by the control algorithms generates the control output signal (CONTROL_OUTPUT+) for the external driver of the proportional
valve which operates the hydraulic flow to the actuator.
The output range and polarity are software selectable within ±10 V
DC (for voltage) or 0 ÷ 20 mA (for current) maximum range referred to the analog
ground (AGND); default setting is ±10 V
DC.
11.8 Position monitor output signal (P_MONITOR+)
The controller generates an analog voltage output signal proportional to the actual axis position; the monitor output signal can be software set to show other
signals available in the controller (e.g. analog reference, fieldbus reference, position error, valve spool position).
The output polarity is software selectable within ±10 V
DC maximum range referred to the analog ground (AGND); default setting is ±10 VDC.
The P_MONITOR signal is also present on the front panel at test point X1.
11.9 Pressure or force monitor output signal (F_MONITOR+)
For alternated position/force (or position/pressure) control, the Z-ME-KZ generates an analog voltage output signal proportional to the actual pressure or
force applied to the actuator end; the monitor output signals can be software set to show other signals available in the controller (e.g. analog reference, force
reference).
The output polarity is software selectable within ±10 V
DC maximum range referred to the analog ground (AGND); default setting is ±10 VDC.
The F_MONITOR signal is also present on the front panel at test point X2.
11.10 Enable Input Signal (ENABLE)
To enable the controller, a 24V
DC voltage has to be applied on pin d18 referred to pin b28.
When the Enable signal is set to zero the controller can be software set to perform one of the following actions:
- move forward or backward in open loop - default setting
- move forward and maintain in closed loop a predefined actuator’s position (hold position)
- maintain the actuator actual position in close loop control
- disable the controller functioning (control output set to zero)
11.11 Fault output signal (FAULT)
Fault output signal indicates fault conditions of the controller (alarm active, reference or transducer signal cable broken, max error exceeded, etc.).
Fault presence corresponds to 0 V
DC, normal working corresponds to 24 VDC (pin d22 referred to pin b28).
11.12 Power supply signal for potentiometer position transducer (VREF -10V
DC, VREF +10VDC)
Power supply for potentiometer position transducer may be generated from the controller card using the VREF -10V
DC and VREF +10VDC signal @ max 30 mA.
11.13 Power supply for incremental encoder position transducer (Inc +5VDC, GND)
Power supply for incremental encoder position transducer may be generated from the controller card using the +5V
DC @ max 100 mA.
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