CNC-Step Zero-4 User manual

stand: 6/16/2021
Operating Instructions
Zero-4 / 5-Channel Stepper Controller
Rev. 2.1
Article: 1911 0011
Motor current X/Y/Z: 3.5A
https://www.cnc-step.de/

Operating Instructions
Zero-4 / 5-Channel Stepper Controller
CNC-STEP GmbH & Co. KG ▪ Siemensstrasse 13-15 ▪ 47608 Geldern ▪ Germany
Page 2
Support: +49 (0)2831/91021-50
6/16/2021
Zero-4 / 5-Channel Stepper Controller
Brief description
The "Zero-4" control is a further development of the well-known "Zero-3" control.
It contains the complete electronics required to operate a milling machine with up to 4 axes and up
to 5 stepper motors. The hardware interface "CncPod" and the control software KinetiC-NC are
already included.
The connection to the PC takes place directly via the network interface (LAN). This manual
describes the installation, commissioning, and maintenance of the controller.

Operating Instructions
Zero-4 / 5-Channel Stepper Controller
CNC-STEP GmbH & Co. KG ▪ Siemensstrasse 13-15 ▪ 47608 Geldern ▪ Germany
Page 3
Support: +49 (0)2831/91021-50
6/16/2021
List of contents
1GENERAL.....................................................................................................................5
1.1 Symbol description...................................................................................................................5
2FEATURES...................................................................................................................6
3SECURITY MEASURES...............................................................................................7
3.1 Organizational measures for security ....................................................................................7
3.2 Personnel selection and qualification, basic obligations.......................................................8
3.3 Safety.........................................................................................................................................8
3.4 Safety instructions for specific operating phases ..................................................................9
3.4.1 in normal operation..............................................................................................................9
3.4.2 for set-up, maintenance, repair, disposal...........................................................................10
3.5 Indications of special dangers ...............................................................................................11
3.5.1 electrical energy.................................................................................................................11
3.5.2 Gas, dust, sparking.............................................................................................................11
3.5.3 Hydraulics, pneumatics, steam..........................................................................................12
3.5.4 Oils, fats, gases, and other chemical substances................................................................12
3.6 Safety.......................................................................................................................................12
3.7 Possible hazards to people.....................................................................................................13
3.8 Obligations of the plant operator..........................................................................................13
4COMMISSIONING.......................................................................................................14
4.1 list.............................................................................................................................................14
4.2 mains connection....................................................................................................................14
4.3 Connection of the machine (front)........................................................................................14
.........................................................................................................................................................15
4.3.1 Motor connector (X1, X2, Y, Z)........................................................................................15
4.3.2 Control signals (ST)...........................................................................................................16
4.3.3 Axis of rotation / tangential knife (C) ...............................................................................17
4.3.4 Status LEDs.......................................................................................................................18
4.4 Connections back (PC and accessories) ...............................................................................19
4.4.1 External consumers (sockets)............................................................................................19
4.4.2 External emergency stop ...................................................................................................19
4.4.3 Grounding connection .......................................................................................................20
4.4.4 Other connections..............................................................................................................20

Operating Instructions
Zero-4 / 5-Channel Stepper Controller
CNC-STEP GmbH & Co. KG ▪ Siemensstrasse 13-15 ▪ 47608 Geldern ▪ Germany
Page 4
Support: +49 (0)2831/91021-50
6/16/2021
4.4.4.1 Sensor inputs XLR 1-5................................................................................................20
4.4.4.2 PC connection (LAN) .................................................................................................21
4.4.4.3 Connection frequency converter (FU) for RF spindles...............................................21
4.4.4.4 In / Out........................................................................................................................22
4.5 commissioning.........................................................................................................................23
5CLEANING AND MAINTENANCE..............................................................................24
5.1 Working inside the housing...................................................................................................25
5.1.1 Open the chassis ................................................................................................................26
5.1.2 Replacement of fuses.........................................................................................................26
5.1.3 Setting the DIP switches....................................................................................................27
5.1.4 Closing the chassis.............................................................................................................27
6TECHNICAL DATA.....................................................................................................28
6.1 Absolute limits........................................................................................................................28
6.2 Electrical connection values ..................................................................................................28
6.3 Housing dimensions................................................................................................................29
7CUSTOMER SERVICE ...............................................................................................30

Operating Instructions
Zero-4 / 5-Channel Stepper Controller
CNC-STEP GmbH & Co. KG ▪ Siemensstrasse 13-15 ▪ 47608 Geldern ▪ Germany
Page 5
Support: +49 (0)2831/91021-50
6/16/2021
1General
The present stepper motor control was designed based on all common and known guidelines at the
time of development and tested very elaborately and carefully. Nevertheless, a guarantee for error-
free function cannot be given. The developers guarantee that the Control Zero-4 in conjunction with
suitable mechanical components in the sense of the description and user manual is basically suitable
for the intended purpose.
Any liability for consequential damages or damages resulting from loss of profit, business
interruption, loss of information, etc. is excluded. The stepper motor control Zero-4 is a component
that can only run in conjunction with a suitable personal computer and software. It is by no means
an independent control.
Since mistakes, despite all efforts, can never be completely avoided, we are grateful for every hint.
1.1 Symbol description
NOTE: Information concerning the economic use of the installation
ATTENTION: Special information or rules and prohibitions for damage prevention.
Information or rules and prohibitions for the prevention of personal injury or extensive
property damage.
Ban on people with pacemakers
This sign faces activities in areas that are prohibited for people with pacemakers.
Warning of dangerous electrical voltage
This sign presalts activities on voltage-carrying system components.
Warning of hot surface
This sign presalens activities in dealing with hot objects.

Operating Instructions
Zero-4 / 5-Channel Stepper Controller
CNC-STEP GmbH & Co. KG ▪ Siemensstrasse 13-15 ▪ 47608 Geldern ▪ Germany
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Support: +49 (0)2831/91021-50
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2Features
Up to 4 axes or up to 5 stepper motors can be controlled. For one of the axes, two motors can be
used in parallel (X1, X2)
The phase current for the motors of the X, Y and Z axes can be set together to either 2.8 or 3.5A.
The phase current of the C-axis can be set separately in 4 steps between 1.4 and 3.5A. At a
standstill, the motor current is automatically lowered to 66%.
The step resolution can be selected for each axis separately between 1/5 and 1/10 micro step. This
corresponds to 1000 or 2000 steps per revolution for standard stepper motors (1.8° full step).
The 15-pin Sub-D connector of the C-axis has a 24V PWM output and a 12V power supply for
controlling tangential cutting modules. (z.B.TCM-4 or ETO-3) with or without oscillating knives.
If no oscillating knife is used, alternative a holding brake can be connected to the ST plug. By
switching the corresponding DIP switch, the 24V output on the ST connector is activated.
Both together is not possible!
Via a 9-pin Sub-D socket, the 4 reference or limit switches, as well as an emergency stop switch can
be connected. On a 25-pin Sub-D socket at the back, a 0...10V analog signal is available for speed
control with an (external) frequency converter.
Via two relays, the mains voltage for external consumers can be switched on and off by the software
at two sockets on the back. The sockets can each be loaded with 8A and are secured separately.
Via 12 LEDs on the front panel, the current operating status of the controller can be recognized at
any time.

Operating Instructions
Zero-4 / 5-Channel Stepper Controller
CNC-STEP GmbH & Co. KG ▪ Siemensstrasse 13-15 ▪ 47608 Geldern ▪ Germany
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Support: +49 (0)2831/91021-50
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3Security measures
3.1 Organizational measures for security
•Keep the operating instructions constantly at hand at the place of use of the system (in the
tool compartment or the container provided for this purpose)!
•Observe the generally valid legal and other binding regulations for accident prevention and
environmental protection in addition to the operating instructions! Provide appropriate
instructions to the operator.
•Supplement the operating instructions with instructions including supervisory and reporting
obligations to consider operational peculiarities, e.g., regarding work organization, work
processes, personnel employed.
•Use personal protective equipment as required or required by regulations. Make them
available to the operating staff!
•Regularly check the safety- and hazard-conscious work of the staff in compliance with the
operating instructions!
•Staff are not allowed to wear open long hair, loose clothing, or jewelry, including rings.
There is a risk of injury for example by getting stuck.
•Always observe all safety and hazard instructions on the system!
•Always keep all safety and hazard information on the system in complete readable
condition!
•Ensure cleanliness and order at the plant!
•Shut down the system immediately in the event of changes in its operating behavior and
report the fault to the competent body or person!
•Do not make any changes, additions, and conversions to the plant, without permission!
•Spare parts must comply with the technical requirements laid down by the manufacturer.
This is always guaranteed with original spare parts.
•Comply with prescribed deadlines or deadlines specified in the operating instructions for
recurring inspections and maintenance!
•To carry out maintenance measures, workshop equipment appropriate to the task is
necessary.

Operating Instructions
Zero-4 / 5-Channel Stepper Controller
CNC-STEP GmbH & Co. KG ▪ Siemensstrasse 13-15 ▪ 47608 Geldern ▪ Germany
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Support: +49 (0)2831/91021-50
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NOTE: Please pay attention to the manufacturer documentation of the supplier
companies.
NOTE: Please note the special safety instructions in the individual chapters!
3.2 Personnel selection and qualification, basic obligations
•Define the plant operator responsibility also regarding traffic regulations and enable him to
refuse safety-violating instructions from third parties!
•Use only trained or instructed personnel. Clearly define the responsibilities of the staff for
operation, set-up, maintenance, and repair!
•Work on / with the plant may only be carried out by reliable personnel. (Observe the legally
permissible minimum age!)
•Make sure that only personnel commissioned for this purpose will work at the plant!
•Allow personnel to be trained, to be trained, to be instructed or in the context of a general
training only under the constant supervision of an experienced person at the plant!
•All work on the electrical system may only be carried out by the trained and qualified
personnel for this purpose.
3.3 Safety
The stepper motor control Zero-4 is partially exposed to high thermal loads. Any modifications and
changes to the control system are made at the risk of the operator and lead to the loss of any
warranty and warranty claims.
The controller is provided with a forced ventilation. The heat-developing components reach
temperatures of over 70°C in the normal operating state. Pay attention to adequate air supply. In
particular, the ventilation openings must not be closed, covered, or penetrated.
Furthermore, all applicable electrical regulations and CE standards must be complied with.
Especially when connecting the supply voltage, extreme caution is appropriate. For the connection
of motors and end/reference switches, use separate and shielded cables. For motor cables, we
recommend a cable cross-section of at least 0.5 mm².

Operating Instructions
Zero-4 / 5-Channel Stepper Controller
CNC-STEP GmbH & Co. KG ▪ Siemensstrasse 13-15 ▪ 47608 Geldern ▪ Germany
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Support: +49 (0)2831/91021-50
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3.4 Safety instructions for specific operating phases
3.4.1 in normal operation
•Before switching on the system, make sure that only authorized persons are in the work area
of the system!
•Refrain from any safety-related way of working!
•Take all measures to ensure that the system is only operated in safe and functional
condition!
•Operate the system only if all protective devices and safety-related devices, e.g., detachable
protective devices, emergency stop devices, extraction devices, are available and functional!
•Check the system at least once per shift for externally recognizable damage and defects!
Report any changes that have occurred immediately to the competent authority or person! If
necessary, shut down the system immediately!
•Shut down the system immediately in case of malfunctions! Have faults eliminated
immediately!
•Observe the control indicators during the switching on and off processes according to the
operating instructions!
NOTE: Please note the special safety instructions in the individual chapters!

Operating Instructions
Zero-4 / 5-Channel Stepper Controller
CNC-STEP GmbH & Co. KG ▪ Siemensstrasse 13-15 ▪ 47608 Geldern ▪ Germany
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Support: +49 (0)2831/91021-50
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3.4.2 for set-up, maintenance, repair, disposal
•Comply with the setting, maintenance and inspection activities and dates prescribed in the
operating instructions! These activities may only be carried out by qualified personnel.
•Inform the operating staff before the start of the execution of special and maintenance work!
Appoint a supervisor!
•For all work, observe the switching on and off processes in accordance with the operating
instructions and the instructions for maintenance work!
•Secure the maintenance area, if necessary, over a wide area!
•If the system is completely switched off during maintenance and repair work, it must be
secured against unexpected reactivating. For example, by locking the main switch or
attaching a
•Warning sign on the main switch.
•For assembly work above body height, use only safety-related ascent aids. Do not use plant
parts as ascent aids! For maintenance work at a higher altitude, use fall protection devices!
•Keep all handles, kicks, railings, pedestals, stages, and ladders free of pollution!
•During maintenance and repair work, tighten loosened screw connections again and again!
•If the disassembly of safety devices is required during set-up, maintenance and repair, the
reassembly and inspection of the safety devices must take place immediately after
completion of the maintenance and repair work.
•Ensure safe and environmentally friendly disposal of operating and auxiliary materials as
well as replacement parts!
NOTE: Please note the special safety instructions in the individual chapters!

Operating Instructions
Zero-4 / 5-Channel Stepper Controller
CNC-STEP GmbH & Co. KG ▪ Siemensstrasse 13-15 ▪ 47608 Geldern ▪ Germany
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Support: +49 (0)2831/91021-50
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3.5 Indications of special dangers
3.5.1 electrical energy
•Work on electrical systems or equipment may only be carried out by an
electrical specialist or by instructed persons under the direction and supervision
of an electrical specialist in accordance with the electrotechnical rules.
•People with pacemakers are not allowed to enter the control cabinet areas!
•Plant components on which inspection, maintenance and repair work is carried
out must - if prescribed - be switched voltage-free. First check the unlocked
parts for freedom from tension, then ground and short-circuit as well as isolate
adjacent parts under tension!
•Use only original fuses with prescribed current! In the event of disturbances in
the electrical power supply, switch off the system immediately!
•Inspect or check the electrical equipment of the system regularly. Eliminate
defects, such as loose connections, damaged or brittle cables, etc. immediately.
•If work on voltage-carrying parts is necessary, then call in a second person
who, in an emergency, operates the emergency stop or the main switch with
voltage release. Lock off the work area with a red and white safety chain and a
warning sign. Use only voltage-insulated tools!
NOTE: Please note the special safety instructions in the individual chapters!
3.5.2 Gas, dust, sparking
•Carry out welding, burning, and grinding work on the system only if this is expressly
approved. There may be a risk of fire and explosion!
•Clean the system and its environment of dust and combustible substances before welding,
burning, and grinding and ensure sufficient ventilation (risk of explosion)!
•When working in enclosed rooms, please observe all existing national regulations!

Operating Instructions
Zero-4 / 5-Channel Stepper Controller
CNC-STEP GmbH & Co. KG ▪ Siemensstrasse 13-15 ▪ 47608 Geldern ▪ Germany
Page 12
Support: +49 (0)2831/91021-50
6/16/2021
3.5.3 Hydraulics, pneumatics, steam
•Work on hydraulic equipment may only be carried out by people with
special knowledge and experience in hydraulics!
•Check all cables, hoses, and screws regularly for leaks and externally
recognizable damage! Eliminate damage immediately! Oil spraying out
can lead to injuries and fires.
•Open system sections and pressure lines to (hydraulics, compressed air,
coolants) make them pressure less before the start of the repair work
according to the assembly descriptions!
•Lay and assemble hydraulic, coolant and compressed air lines
professionally! Do not swap the connections! Fittings, as well as length
and quality of the hose lines must meet the technical requirements.
3.5.4 Oils, fats, gases, and other chemical substances
•When handling oils, fats, gases, and other chemical substances, observe
the safety regulations applicable to the product!
•Be careful when handling hot operating and auxiliary substances (risk of
combustion or scalding)!
3.6 Safety
•Emergency stop device with emergency stop buttons on control housing. (Emergency stop
chain according to valid regulation)

Operating Instructions
Zero-4 / 5-Channel Stepper Controller
CNC-STEP GmbH & Co. KG ▪ Siemensstrasse 13-15 ▪ 47608 Geldern ▪ Germany
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Support: +49 (0)2831/91021-50
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3.7 Possible hazards to people
Remaining danger points
•The safety devices on the system are based on many years of experience and comply with
the relevant regulations. Nevertheless, hazards in dealing with systems cannot be completely
ruled out.
•The operating and service personnel should know the remaining danger points exactly and
always carry out the work on the plant accordingly attentively to avert risks to life and limb
of persons, or impairments of the plant and other tangible assets.
•The safety devices or measures shall be fully effective only when the installation is used as
intended. Special care should be taken with the operating modes with limited safety
equipment (set-up, maintenance, repair).
3.8 Obligations of the plant operator
•Plant safety can only be implemented in operational practice if all necessary measures are
taken. It is subject to the duty of care of the operator of the plant to plan these measures and
to control their execution.
•The plant operator is obliged to maintain the protective devices on the plant and its
periphery as at the time of commissioning.
•Through appropriate instructions and controls, the user must ensure cleanliness and clarity
of the workplace. The operator is also encouraged to bring safety-conscious behavior close
to and educate the operating personnel through internal, application-specific specifications
and protective measures.

Operating Instructions
Zero-4 / 5-Channel Stepper Controller
CNC-STEP GmbH & Co. KG ▪ Siemensstrasse 13-15 ▪ 47608 Geldern ▪ Germany
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Support: +49 (0)2831/91021-50
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4commissioning
4.1 list
The control should be set up in such a way that the controls on the front side, in particular the
emergency stop switch, are always freely accessible. It is important to ensure a continuous air
supply to the ventilation openings on the housing.
Suitable measures (enclosure, protective walls, extraction...) must ensure that the control remains
free of chips, dust, and liquids (oil, cooling water). Metallic chips and cooling water can cause short
circuits. Dust can affect ventilation and thus cause overheating. Both can lead to irreparable damage
and fire hazards.
4.2 mains connection
The controller is equipped with a universal power supply and can be operated without changes to
mains voltages from 115 to 240V AC voltage. If you operate the device abroad, be sure to use only
suitable and approved power cords and socket adapters. These must have a protective conductor
connection and be designed for a load of up to 16A.
4.3 Connection of the machine (front)
At the front are the connections for the positioning motors (plugs X1, X2, Y and Z), the 4th axis
such as axis of rotation or tangential unit (plug C), if available, and the end position and emergency
stop switches (plug ST). Before you connect the connectors, make sure that the assignment of each
contact corresponds to the scheme listed below.
•In the case of incompatible connections, there is a risk that parts of the
controller will be damaged or destroyed.
•Furthermore, the functionality of the system can be limited here by and
safety functions that serve to protect life and limb can be overridden.
•Plug on or off only when the control is switched off!
•Always lock the plugs with the screws located on the plug housing. The
electronics are protected against short circuits and interruption of the
motor lines. However, unreliable contacts can lead to incorrect
positioning and/or arc formation, which can result in tool breakage,
destruction of the workpiece or impairment of the service life of the
system.

Operating Instructions
Zero-4 / 5-Channel Stepper Controller
CNC-STEP GmbH & Co. KG ▪ Siemensstrasse 13-15 ▪ 47608 Geldern ▪ Germany
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1 - On-off switch
2 - Hardship-Off button
3 - Connection’s machine
4 – Status LEDs
4.3.1 Motor connector (X1, X2, Y, Z)
Pin No.
signal
Color *
1+6
Motor winding A+
yellow
2+7
Motor winding A-
green
3+8
Motor winding B+
brown
4+9
Motor winding B-
white
5
Earth, screen
* Color of the wires of the 4-wire motor connection cable
For motors with 3A or higher current, a cable cross-section of at least0.34mm² must be used, and
both pins must always be connected per wire.
For motors with smaller current,0.25mm² and one pin are sufficient.
The shielding can alternatively be connected to pin 5 or the tin collar of the plug.
The engine outputs are short-circuiting resistant (winding and ground closure).
Fig.1: Connection’s front
1
2
3
4

Operating Instructions
Zero-4 / 5-Channel Stepper Controller
CNC-STEP GmbH & Co. KG ▪ Siemensstrasse 13-15 ▪ 47608 Geldern ▪ Germany
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4.3.2 Control signals (ST)
On this plug, limit switch and emergency stop are connected.
Emergency stop must be an opener.
In contrast to the Zero-3, the switch inputs are now designed for PNP sensor types.
When using mechanical or magnetic (reed) switches, the switch must be connected between +24V
(pin 9) and pin 1 to 5. This is compatible with the Zero-3, where pin 9 was signal mass !
For inductive sensors, the following applies: blue wire at pin 6 (-), black ones at pin 1 to 4, brown
ones (+) at pin 9.
Pin No.
signal
Color*
Software PIN
1
Limit switch C or length switch
grey
LPT1 - PIN15 (-)
2
Limit switch X
pink
LPT1 - PIN13 (-)
3
Limit switch Y
green
LPT1 - PIN12 (-)
4
Limit switch Z
brown
LPT1 - PIN10 (-)
5
Emergency stop (closed = OK, open =
stop)
white
LPT1 - PIN11 (-)
6
Signal mass
7
optional holding brake (+24V)
8
optional holding brake (mass)
9
+24V sensor supply
frame
Shielding, if available.
Attention: do not connect to PIN9!
( was mass, is now +24V!
yellow
* Color of the wires of the 6-wire ST connection cable
The holding brake, if available, please only connect to pin 7 and 8. The mass of pin 8 may not be
used as a signal mass or for other purposes, since it runs together with pin 7 via a suppression
choke.
In the case of asymmetric currents, this leads to EMC problems. Pin7's 24V are generated by PWM
from the 48V power supply and may only be used for a holding brake or other passive consumers,
not for sensors or sensitive electronics.

Operating Instructions
Zero-4 / 5-Channel Stepper Controller
CNC-STEP GmbH & Co. KG ▪ Siemensstrasse 13-15 ▪ 47608 Geldern ▪ Germany
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4.3.3 Axis of rotation / tangenti al knife (C)
The 4th axis can be used either for an axis of rotation (sub-apparatus) or for a tangential knife. So
that this axis can also be retrofitted afterwards without having to intervene in the existing wiring, all
the necessary additional signals are also available on this connector.
Pin No.
signal
Software PIN
1+9
Stepper motor winding A+
2+10
Stepper motor winding A-
3+11
Stepper motor winding B+
4+12
Stepper motor winding B-
7+8
Oscillation motor +12...24V (max. 3A)
14+15
Oscillation motor mass
13
Limit switch C (input low-active - NPN)
LPT1 - PIN15 (-)
5
Signal mass, screen
6
Fan, sensor +12V max. 150mA
Stepper motor, oscillation motor and 12V output are short-circuit resistant. Since the 12V supply is
also used internally, however, malfunctions of the control are possible in the event of a short circuit.
Pins 5 and 14-15 (ground) are internally connected but should be moved separately to prevent
interference from the limit switch signals by the motor.
The limit switch can be an opener or closer to ground. The polarity can be selected in the software
KinetiC-NC.
Because of the necessary compatibility with the tangential knife, the PIN assignment remains the
same as with the Zero-3.
12V can still be used for the fan. The reference switch remains low-active (NPN) or a mechanical
switch is connected between pin 5 and 13.

Operating Instructions
Zero-4 / 5-Channel Stepper Controller
CNC-STEP GmbH & Co. KG ▪ Siemensstrasse 13-15 ▪ 47608 Geldern ▪ Germany
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4.3.4 Status LEDs
To indicate the operating status, several LEDs are arranged on the front panel (numbers from left to
right).
LED
No.
color
symbol
meaning
1
green
Power (control turned on)
2
green
Ready (PC software ready, toggle signal)
3
yellow
Running (power cut when off)
4
yellow
Relay 1 (spindle on)
5
yellow
Relay 2 (cooling, suction)
6
red
Emergency stop (mushroom button or ext.
Entrance)
7
red
Disturbance X1 axis
8
red
Disturbance X2 axis
9
red
Disturbance Y-axis
10
red
Perturbation Z-axis
11
red
Disturbance C-axis
12
red
Disturbance oscillation motor or brake
Some special states are indicated with flashing signals:
•Overheating: LEDs 7-12 flash simultaneously
•Overvoltage: LEDs 1 and 7-12 flash simultaneously
•Undervoltage: LED 1 flashes
PC
!

Operating Instructions
Zero-4 / 5-Channel Stepper Controller
CNC-STEP GmbH & Co. KG ▪ Siemensstrasse 13-15 ▪ 47608 Geldern ▪ Germany
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Fig.3: External emergency
stop
Fig.: miniXLR 4-pin
4.4 Connections back (PC and accessories)
1 - Mains connection 110-230V
2 - Socket Rel.1
3 - Socket Rel. 2
4 - External distress - from Connector
5 - Connections PC and accessories
6 –Grounding connection to the
machine
4.4.1 External consumers (sockets)
To the two sockets at the back, two 230V consumers can be connected. The left socket seen from
behind is switched with relay 1 and is usually intended for the spindle motor. The right socket is
switched with relay 2 and can be used either for a vacuum cleaner, a coolant pump, or other
aggregates.
The maximum current consumption of each individual consumer must not exceed 8A. The sum of
the current consumption must not exceed 13.5A (16A minus the maximum own consumption).
Please note that the maximum current consumption may be higher than the nominal power of the
device would suggest. The maximum current consumption, which also considers start-up and
reactive currents, can be found on the type of plate or in the documents of the manufacturers.
Exceeding the maximum current leads to the triggering of the fuses located inside the housing.
4.4.2 External emergency stop
Here an external emergency stop button can be connected. If no external emergency stop is
connected, the supplied bridging plug must be plugged in.
1 - Bridging plug
(Bridge over PIN 1 + 3)
1
2
3
4
5
6
Fig.2: Connections back
1

Operating Instructions
Zero-4 / 5-Channel Stepper Controller
CNC-STEP GmbH & Co. KG ▪ Siemensstrasse 13-15 ▪ 47608 Geldern ▪ Germany
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Fig.5: In / Out
Fig.: miniXLR 3-pin
4.4.3 Grounding connection
For machines with grounding connection, the grounding cable of the machine is
connected here.
e.g., High-Z series from year of construction 03/2015
4.4.4 Other connections
The controller offers various connection options for accessories.
4.4.4.1 Sensor inputs XLR 1 -5
The xlr1 to xlr5 connectors can be used for PNP inductive sensors or mechanical switches.
Mechanical or magnetic switches (reed) must be connected between pin 1 and 3.
For inductive sensors: brown wire on pin 1 (+), blue (-) on pin 2, black on pin 3.
Pin No.
signal
1
+24V supply
2
mass
3
Signal
The PIN allocation of the 5 XLRinputs in the software is:
XLR
Application
Software Pin
1
Security door enclosure
LPT2 - PIN5 (-)
2
Tool length button
LPT2 - PIN6 (+)
3
3D Finder
LPT2 - PIN7 (+)
4
2-hand operation
LPT2 - PIN8 (+)
5
reserve
LPT2 - PIN9
Fig.4: Grounding
connection