Festo CMMT-AS-C2-11A-P3 S1 Series Operating Instructions Manual page 7

Always connect PE connection on the mains side (PE rail in the control cabinet) at
the following positions:
– PE pin of the connection [X9A]
– PE connection (earthing screw) next to the upper slot of the cooling element
The cross section of the PE conductors must be at least equal to the cross section
of the mains conductors L at [X9A]. Wire individually wired devices in a star shape.
Observe the requirements for cross-wiring for cross-wired devices. Recommenda-
tion: use copper earthing strap (advantageous for EMC).
1. Equip PE conductors for the earthing screw with a suitable cable lug.
2. Tighten earthing screw with a TORX screwdriver of size T20 (tightening torque
1.8 Nm ± 15 %).
Fig. 6: PE connection (earthing screw)
7.6 Information on EMC-compliant installation
A mains filter is integrated into the device. The mains filter fulfils the following
tasks:
– Guarantees the device's immunity to interference
– Limits the conducted emissions of the device
The device fulfills the requirements of the relevant product standard EN 61800-3
with suitable installation and wiring of all connecting cables.
The category that the device fulfils is dependent on the filter measures used and
the motor cable length. The integrated mains filter is designed so the device fulfils
the following categories when operated as an individual device:
CMMT-AS... PWM required measures
[kHz]
Category C2: operation in the first environment (residential area)
-C2-11A-P3 8 Line choke
-C3-11A-P3 8 – (none)
-C5-11A-P3
Category C3: operation in the second environment (industrial area)
-C2-11A-P3 8 – (none)
-C3-11A-P3
external mains filter
-C5-11A-P3
Tab. 15: Category according to the cable length
Required measures
Measures Description
Line choke A line choke with three partial windings must be installed for mains supply lines
(3 x ³3.7 mH) L1, L2 and L3 (3 x ³ 3.7 mH) to comply with the mains harmonics requirements
in accordance with EN 61000-3-2 – accessories.
External mains Install a suitable external mains filter - Accessories.
filter
Tab. 16: Installation measures to achieve the specified category
To install a line choke è 7.7 Connection examples.
– If set-up and commissioning are performed by a professional with the neces-
sary experience for setting up and commissioning drive systems, including
their EMC aspects, category C2 devices can be used in the first environment
(residential area).
– For operation of category C2 devices, limit values for the harmonic currents
in the network (EN 61000-3-2 or EN 61000-3-12) apply, depending on the
connected load of the machine. Please check whether this is the case for
your facility/system. As a rule, compliance with the limit values for harmonic
currents requires the use of external filter measures, e.g. installation of a line
choke.
– Category C3 devices are intended for use in the second environment only
(industrial environment). Use in the first environment is not permitted.
This product can generate high frequency interference, which may make it neces-
sary to implement interference suppression measures in residential areas.
In practice, the combination of the components used and their properties influ-
ence the achievable length of the motor cable è Manual Assembly, Installation.
1 PE connection (earthing screw)
1
Max. permissible motor
cable length [m]
10
10
50
100
7.7 Connection examples
Connection plan, 3-phase mains connection
1
2
3
4
5
6
7
Fig. 7: Connection example
Braking resistor
1
Circuit breaker or 3 x fuses
2
Main switch/main contactor
3
Line choke if required (for cate-
4
gory C2)
STO connection example
The safety sub-function STO (safe torque off ) is triggered by an input device that
makes the safety request (e.g. light curtain).
1 2
Fig. 8: STO sample circuit
1 Input device for safety request
(e.g. light curtain)
2 Safety relay unit
Information on the sample circuit
The safety request is passed on to the servo drive on 2 channels via the inputs
#STO-A and #STO-B at the connection [X1A]. This safety request results in the
2-channel switch-off of the driver supply to the servo drive's power output stage.
The safety relay unit can use the STA diagnostic output to monitor whether the
safe status has been reached for the safety sub-function STO.
PELV fixed power supply for 24 V
5
supply
Encoder 2 (optional)
6
Encoder 1
7
3
4
3 Servo drive CMMT-AS
4 Drive axle