4.2 Electric
Warning
Use power supplies which guarantee reliable electrical isolation of the operating
voltage as per IEC/EN 60204-1. Consider also the general requirements for PELV
circuits in accordance with IEC/EN 60204-1.
Note
Long signal lines reduce the resistance to interference.
Connect the SMAT-8M to the analogue control input with a connecting cable
which is as short as possible (max. length of connecting cable
è
chapter 11).
1. Make sure that the operating voltage is switched off.
2. If a connecting cable with an open end is used: connect the wiring as shown in
Fig. 4.
3. If a 4-pin plug connector M8x1 is used: the maximum torque to be applied when
securing the plug is 0.3 Nm.
Circuit diagram (normal operation)
Fig. 4
Pin allocation
Pin
Allocation
Wire colours
1)
Plug
1
Operating v24 V DC
Brown (BN)
M8x1, 4-pin
2
Analogue output 0 V
White (WH)
3
0 V
Blue (BU)
4
Analogue output 0 … 10 V
2)
Black (BK)
1)
Using a connecting cable with open end
2)
The analogue output is connected to the operating voltage in order to initialise the measuring range
.
5
Commissioning
5.1 Commissioning without additional initialisation
The SMAT-8M can be put into operation immediately without any additional initial
isation.
1. Switch on the operating voltage.
è
The LED lights up (depending on the piston position
è
Fig. 11).
è
The device is ready for operation.
5.2 Commissioning with initialisation of the measuring range
Note
The initialisation carried out at the factory is a one-time pre-initialisation. Every
new initialisation must be carried out manually.
Customer-specific initialisation is possible for specialised applications (enlarging
the working range, increasing repetition accuracy on grippers and compact cylin
ders,
è
catalogue).
Note
External magnetic fields, e.g. from magnetic tools or external structures, affect
the measurements of the SMAT-8M.
When determining the measuring range, move the SMAT-8M without using a
tool if possible or use non-magnetic tools.
Initialise the SMAT-8M in the genuine application environment.
During initialisation, the measuring range of the SMAT-8M is set to the magnetic
properties of the drive.
Re-initialise the SMAT-8M every time the drive is changed.
Use a connecting cable with an open end, e.g. NEBU-M8G4-...-LE4.
Use a separate terminal for the connection to pin 4.
Note
Repetition accuracy is better in the middle of the measuring range than at the
edge.
For critical applications, position the SMAT-8M so that the relevant measuring
points are close to 5.5 V.
Circuit diagram (initialisation)
Fig. 5
Initialising the measuring range when using the SMAT-8M on standard cylinders
Cylinders with a stroke of at least 40 mm are called standard cylinders in this docu
ment.
1. Switch off the operating voltage.
2. Manually move the piston of the standard cylinder into one of two end positions.
Secure the piston rod to prevent it twisting.
3. Connect the SMAT-8M to the operating voltage using the connecting cable with
an open end
(
è
Fig. 5). Use a separate terminal for the connection to pin 4.
4. Switch on the operating voltage.
è
The red LED flashes, and the SMAT-8M is ready for initialisation.
Fig. 6
5. Manually insert the SMAT-8M into the slot opposite the position of the piston
(
è
Fig. 6).
6. Slowly push the SMAT-8M in the slot in the direction of the piston until the green
LED lights up.
7. Secure the SMAT-8M in this position (
è
chapter 4.1).
8. Disconnect pin 4 from the operating voltage, without interrupting the operating
voltage on pin1.
è
The initialised values are saved in the SMAT-8M. They will be retained even
in the event of power failure.
è
The red LED goes out.
è
The green LED lights up. The SMAT-8M is ready for operation.
9. Connect the SMAT-8M to the analogue control input (
è
Fig. 4).
10. If necessary, push the SMAT-8M into the desired measuring position.
Note
If the initialisation process terminates prematurely, the SMAT-8M goes into its
non-initialised status and must be re-initialised. The previous initialisation can
not be reproduced.
If initialisation was not finished correctly or an adequate signal was not detected,
both LEDs will flash at the same time (
è
chapter 9).
Initialising the measuring range when using the SMAT-8M on compact cylinders
1. Switch off the operating voltage.
2. Manually move the piston into the mid-position of the piston stroke.
3. Connect the SMAT-8M to the operating voltage using the connecting cable with
an open end
(
è
Fig. 5).
Use a separate terminal for the connection to pin 4.
4. Switch on the operating voltage.
è
The red LED flashes, and the SMAT-8M is ready for initialisation.
Fig. 7
5. Manually insert the SMAT-8M into the slot at the start of the slot (
è
Fig. 7).
6. Slowly push the SMAT-8M in the slot in the direction of the piston until the green
LED lights up (
è
Fig. 7).
7. Keep pushing the SMAT-8M along until the green LED goes out again.