QUESTION:
What precautions should be taken when connecting a motor temperature sensor (PTC / KTY)?
ANSWER:
MICROMASTER 430 / 440
SINAMICS G120 CU240
PTC (resistor with a positive temperature characteristic)
The PTC is connected to the control terminals 14 and 15 of the MICROMASTER.
PTC monitoring is activated with the parameter setting P0601 = 1.
KTY (semi-conductor thermo-sensor (diode))
The KTY84 must be connected so that the anode of the diode is connected to terminal 14 and the cathode to terminal 15.
KTY monitoring is activated with the parameter setting P0601 = 2.
See also FAQs: 737975027231021
G110
KTY not available
PTC
The PTC-temperature sensor must be fitted to the motor and connected to the inverter control terminals as shown in the Figure.
To enable the trip function set up one of the digital inputs using DIN0 (P0701) or DIN1 (P0702) or DIN2 (P0703) to a value of 29 (external fault).
MM420
KTY not available
PTC
The PTC-temperature sensor must be fitted to the motor and connected to the inverter control terminals as shown in the Figure.
To enable the trip function set up one of the digital inputs using DIN0 (P0701) or DIN1 (P0702) or DIN2 (P0703) to a value of 29 (external fault).
EMC
In order to avoid EMC noise from being coupled-in to the drive converter electronics – and the associated disturbances – it is not permissible to use free, unscreened, conductors in the motor cable to connect the temperature sensor to the drive converter.
The temperature sensor must be connected to the drive converter using a separate cable (if at all possible, this cable should be shielded). Terminate the ends of the cable neatly, ensuring that unscreened wires are as short as possible.
Separate the sensor cable from the power cables as much as possible, using separate trunking, cross them if necessary at 90º to each other.
Use screened or armored cables for the motor connections and ground the screen at both ends using the cable clamps.
Cable lengths
As long as the above mentioned instructions are observed, PTC / KTY cables of several 100m can be used; for longer cable lengths, the conductor cross-section should be increased to avoid measurement errors. The possible signal cable cross-section of the terminals please find in the several operating instructions.
Additional information is provided in the relevant operating instructions:
Question:
What should be considered when using the relay outputs DO 0 and DO 2 of the CU230P-2?
Answer:
230V AC can be switched using the relay outputs DO 0 and DO 2 of the Control Unit. These terminals can therefore be at 230V AC - independent of the voltages present in the power module.
For this reason, when working at the inverter appropriate protective measures must always be carefully observed.
Cables with double insulation must always be used for control unit relay outputs DO 0 and DO 2 when 230V is connected to these terminals in order to ensure operational safety.
Written by:
Industry Sector, I DT MC CS
What cable lugs should be used to connect a SINAMICS G120?
For SINAMICS G120 with Power Modules PM240 Sizes D-F, PM250 Sizes D-F and PM260 FS F, Line Supply & Motor Connections ring-type cable lugs according to DIN46234, as described in the attachment, should be used.
This FAQ applies to the SINAMICS G120 Control Units without “-2” in the product name.
Please note
This FAQ only works for the IOP, it does not apply to the BOP-2!
The IOP can be used together with the CU240S..., CU240E in two different ways.
1. The IOP can be connected to the CU240S..., CU240E via IOP Handheld.
What do I need?
IOP Handheld (order number: 6SL3255-0AA00-4HA0)
PC-Connection Kit for CU240S/E (order number: 6SL3255-0AA00-2AA1)
2. The IOP can be used as a door mounted option with the CU240S..., CU240E control units, but only with an additional cable and an external power supply for the IOP.
What do I need?
IOP (order number: 6SL3255-0AA00-4JA0)
Door Mounting Kit for the IOP (order number: 6SL3256-0AP00-0JA0)
PC-Connection Kit for CU240S/E (order number: 6SL3255-0AA00-2AA1)
"Knorrtec" Connection Cable for CU240S/E, connecting the external power supply of IOP (order number see PDF)
External DC +24V, (e.g. SITOP PSU100C; order number: 6EP1331-5BA00)
Warning Do not connect 24V DC directly to the IOP, or demage will result!
Notes
The "Knorrtec" connection cable is fitted with a DC/DC coupler (with galvanic separation, 24VDC, 50 mA) to allow the use of a external +24V DC power supply.
Wiring and cable specification, contact details and order number can be found in the attached PDF-file.
The responsibility for this cable lies with the Siemens solution partner Knorrtec.
The screen termination kit has been designed to allow the termination of control, mains and power cables to ensure the correct electrical grounding to the inverter.
Extent of supply:
The screening kit includes:
• a shield bonding plate for the required Power Module
• a shield bonding plate for a Control Unit
• connection elements and clamps for mounting
• mounting device for Brake Relay or Safe Brake Relay for frame sizes FSB to FSF
Order no. :
Product Description
6SL3262-1AA00-0BA0
Screening Kit for PM240 FSA
6SL3262-1AB00-0DA0
Screening Kit for PM240 FSB
6SL3262-1AC00-0DA0
Screening Kit for PM240 und PM250 FSC
6SL3262-1AD00-0DA0
Screening Kit for PM240 und PM250 FSD und FSE
6SL3262-1AF00-0DA0
Screening Kit for PM240 und PM250 FSF
6SL3262-1FD00-0CA0
Screening Kit for PM260 FSD
6SL3262-1FF00-0CA0
Screening Kit for PM260 FSF
The mechanical data of the Screen Termination Kit are listed in the following table for the respective sizes of the power module (PM).
Measures of the Screen Termination Kit
Frame size PM
Height:
Breadth:
Depth:
Weight:
Degree of protection:
Ambient temperature in operation:
PM240 FSA
99.2 mm
73 mm
62 mm
0.438 kg
IP20
-10 to +50°C
PM240 FSB
90.7 mm
153 mm
72.5 mm
0.527 kg
IP20
-10 to +50°C
PM240 & PM250 FSC
89.3 mm
189 mm
91.5 mm
0.63 kg
IP20
-10 to +50°C
PM240 & PM250 FSD
215 mm
275 mm
96 mm
1.5 kg
IP20
-10 to +50°C
PM260 FSD
101 mm
275 mm
88 mm
IP20
-10 to +50°C
PM240 & PM250 FSE
215 mm
275 mm
96 mm
1.5 kg
IP20
-10 to +50°C
PM240 & PM250 FSF
290 mm
350 mm
160 mm
2.5 kg
IP20
-10 to +50°C
PM260 FSF
302.2 mm
350 mm
160 mm
IP20
-10 to +50°C
Further notes:
ID: 23621093 “SINAMICS G120 Screen Termination Kit PM240 Power Modules”
The issue only arises when P0756=1 – "Voltage input 0 – 10V unipolar with monitoring"
The Analogue input monitoring works by defining a voltage dead band. To detect a wire break the dead band is normally set to monitor around 0V. However, the design of the Analogue input (AI0+ and AI0-) is such that both inputs float to approximately 2.6V. If there is no connection to an input e.g. in the event of a wire break there will be a voltage potential between the analogue input terminals. A set-point will be generated. If default scaling values are used, this will be approximately +\-13Hz, depending which wire is broken.
1. For a wire break on AI0+ the set-point will generate a positive set-point.
2. For a wire break on AI0- the set-point will generate a negative set-point.
3. For a wire break on both AI0+ and AI0- the potential difference will be 0V, so no set-point will be generated.
The following Control Units are affected:
CU240E 6SL3244-0BA10-0BA0
CU240S 6SL3244-0BA20-1BA0
CU240S DP 6SL3244-0BA20-1PA0
CU240S DP-F 6SL3244-0BA21-1PA0
CU240S PN 6SL3244-0BA20-1FA0
CU240S PN-F 6SL3244-0BA21-1FA0
Solution:
The following solution can be used to resolve this undesirable behavior:
Connect a 10kΩ resistor (see diagram, 10kΩ +/- 1%) between terminals X3 and X4 of the Control Unit. Parameterize the analog input as follows:
Various encoder types (e.g. 1XP8001-1 (HTL) and 1XP8001-2 (TTL)) can be used to sense the required speed and position signals.
The MICROMASTER 4 pulse encoder module is designed so that all of the usual digital HTL and TTL pulse encoders can be used with the MICROMASTER 430/440 series of drive inverters.
The same is true for the SINAMICS G120 with CU240S series, whereby the evaluation of the encoder signals is integrated in the CU240S.
Help when selecting cables to match 1XP8001-1 encoders is provided in the following.
This FAQ applies only to the SINAMICS G120/G120D Power Module PM240/PM240-2 and MICROMASTER 4 inverters.
The connecting of the brake resistor changes by different frame sizes:
Frame sizes A- C To mount the brake resistor onto a MICROMASTER 440 or SINAMICS G120:
for frame sizes A and B a 3 x 1.5 mm², 0.55m long silicon cable is used.
for frame size C, a 3 x 1.5 mm², 0.91m long cable is used.
The cable is shielded designed for a temperature of 200°C and a voltage of 1000V, and is UL listed (UL-file E69837).
Frame sizes A and B use cable lugs to connect the cable.
Frame size C has conductor end sleeves (but not the protective conductor).
Note
In order that the braking resistor with cable lugs can be connected to frame sizes A and B, the cover must be removed in order to access the connecting terminals. Additional information on connections with cable lugs is provided in the Assembly Manual, Power Module PM240 in the Chapter "Installing a braking resistor" (Entry-ID: 52593268). A simpler solution involves replacing the cable lugs by conductor end sleeves.
Frame sizes D- F
For this frame sizes there is no cable provided on the system side.
We recommend the following for frame sizes D - F:
Frame size D: Cross-section 6 mm², shielded, cable lug, an M6 terminal is provided.
Frame size E: Cross-section 16 mm², shielded, cable lug, an M6 terminal is provided.
Frame size F: Cross-section 35 mm², shielded, cable lug, an M6 terminal is provided.
Frame sizes FX and GX
Frame size FX & GX do not have an integrated braking chopper. Braking operation can only be implemented using an external braking module.
Information
All of the resistors are equipped with temperature monitoring (UL-file E43273). Non-shielded 0.5 – 2.5 mm² cables can be connected.
Information regarding the assembly and to select and dimension the resistor brake is provided in the Operator Instructions of the inverter.
MM4: Operating Instructions under "Functions", "Dynamic braking" Beitrags-ID: 24294529
G120: Function Manual under "Dynamic braking" Beitrags-ID: 52614597
Massbild_PM240_FSA.pdf
