Sinamics PM240-2 braking chopper duty cycle update

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With immediate effect the maximum braking chopper duty cycle of Sinamics PM240-2 FS (Frame Size) D to F 3AC 200 V, 3AC 400 V and 3AC 690 V is upgraded from 5% to 50% based on 240 seconds cycle under 40 °C ambient temperature. The update is released both from IEC and UL/CSA perspective. The overview table for the maximum braking chopper duty cycle of Sinamics PM240-2 is presented in Table 1-3.

When the updated braking chopper duty cycle (> 5%) of Sinamics PM240-2 is used, users must pay attention to following points.

Users must select a suitable braking resistor by themselves. Key parameters for selecting the braking resistor can be found from Table 1-3. User must be aware of the resistance tolerance for the self-selected braking resistor. The tolerance should be in the range of -7% to +7%.
Braking resistors provided by Siemens (see ordering information from Chapter 8.6 of Hardware Installation Manual, see 109756015) are only for 5% duty cycle.
It is strongly suggested by Siemens that users select a braking resistor with a thermal switch. There is no I²t protection for the braking resistor from Sinamics PM240-2.
There is a derating of the braking chopper duty cycle of Sinamics PM240-2 FSD to FSF against ambient temperature. Detailed in Figure 1. The derating profile must be considered by users when they engineer the braking chopper.

Sinamics PM240-2 1/3AC 200V braking chopper duty cycle

Article no. 6SL321	Frame Size	Rate LO Power (kW)	Rated HO power (kW)	Minimum braking resisitance (ohm)	Peak braking power (kW)	Maximum braking duty cycle	Rated braking power (kW)
0-1PB13-0XL0	FSA	0.55	0.37	200	0.55	100%	0.55
■-1PB13-8XL0	FSA	0.75	0.55	200	0.75	100%	0.75
0-1PB15-5XL0	FSB	1.1	0.75	68	1.1	100%	1.1
0-1PB17-4XL0	FSB	1.5	1.1	68	1.5	100%	1.5
■-1PB21-0XL0	FSB	2.2	1.5	68	2.2	100%	2.2
0-1PB21-4XL0	FSC	3	2.2	37	3	100%	3
■-1PB21-8XL0	FSC	4	3	37	4	100%	4
■-1PC22-2XL0	FSC	5.5	4	20	5.5	100%	5.5
■-1PC22-8XL0	FSC	7.5	5.5	20	7.5	100%	7.5
0-1PC24-2UL0	FSD	11	7.5	7.5	11	50%	5.5
0-1PC25-4UL0	FSD	15	11	7.5	15	50%	7.5
■-1PC26-8UL0	FSD	18.5	15	7.5	18.5	50%	9.25
0-1PC28-0UL0	FSE	22	18.5	4.5	22	50%	11
0-1PC31-1UL0	FSE	30	22	4.5	30	50%	15
■-1PC31-3UL0	FSF	37	30	2.5	37	50%	18.5
0-1PC31-6UL0	FSF	45	37	2.5	45	50%	22.5
■-1PC31-8UL0	FSF	55	45	2.5	55	50%	27.5

Table 1

■ = 0: IP20
■ = 1: Push Through

X = U: unfiltered
X = A: filtered

Sinamics PM240-2 3AC 400 V braking chopper duty cycle

Article no. 6SL321	Frame Size	Rate LO Power (kW)	Rated HO power (kW)	Minimum braking resisitance (ohm)	Peak braking power (kW)	Maximum braking duty cycle	Rated braking power (kW)
0-1PE11-8XL1	FSA	0.55	0.37	370	0.55	100%	0.55
0-1PE12-3XL1	FSA	0.75	0.55	370	0.75	100%	0.75
0-1PE13-2XL1	FSA	1.1	0.75	370	1.1	100%	1.1
0-1PE14-3XL1	FSA	1.5	1.1	370	1.5	100%	1.5
0-1PE16-1XL1	FSA	2.2	1.5	140	2.2	100%	2.2
■-1PE18-0XL1	FSA	3	2.2	140	3	100%	3
0-1PE21-1XL0	FSB	4	3	75	4	100%	4
0-1PE21-4XL0	FSB	5.5	4	75	5.5	100%	5.5
■-1PE21-8XL0	FSB	7.5	5.5	75	7.5	100%	7.5
0-1PE22-7XL0	FSC	11	7.5	30	11	100%	11
■-1PE23-3XL0	FSC	15	11	30	15	100%	15
0-1PE23-8XL0	FSD	18.5	15	25	18.5	50%	9.25
0-1PE24-5XL0	FSD	22	18.5	25	22	50%	11
0-1PE26-0XL0	FSD	30	22	15	30	50%	15
■-1PE27-5XL0	FSD	37	30	15	37	50%	18.5
0-1PE28-8XL0	FSE	45	37	10	45	50%	22.5
■-1PE31-1XL0	FSE	55	45	10	55	50%	27.5
0-1PE31-5XL0	FSF	75	55	7.1	75	50%	37.5
0-1PE31-8XL0	FSF	90	75	7.1	90	50%	45
0-1PE32-1XL0	FSF	110	90	5	110	50%	55
■-1PE32-5XL0	FSF	132	110	5	132	50%	66

Table 2

■ = 0: IP20
■ = 1: Push Through

X = U: unfiltered
X = A: filtered

Sinamics PM240-2 3AC 690V braking chopper duty cycle

Article no. 6SL321	Frame Size	Rate LO Power (kW)	Rated HO power (kW)	Minimum braking resisitance (ohm)	Peak braking power (kW)	Maximum braking duty cycle	Rated braking power (kW)
0-1PH21-4XL0	FSD	11	7.5	31	11	50%	5.5
0-1PH22-0XL0	FSD	15	11	31	15	50%	7.5
0-1PH22-3XL0	FSD	18.5	15	31	18.5	50%	9.25
0-1PH22-7XL0	FSD	22	18.5	31	22	50%	11
0-1PH23-5XL0	FSD	30	22	31	30	50%	15
0-1PH24-2XL0	FSD	37	30	31	37	50%	18.5
0-1PH25-2XL0	FSE	45	37	21	45	50%	22.5
0-1PH26-2XL0	FSE	55	45	21	55	50%	26.5
0-1PH28-0XL0	FSF	75	55	10.5	75	50%	37.5
0-1PH31-0XL0	FSF	90	75	10.5	90	50%	45
0-1PH31-2XL0	FSF	110	90	10.5	110	50%	55
0-1PH31-4XL0	FSF	132	110	10.5	132	50%	66

Table 3

■ = 0: IP20
■ = 1: Push Through

X = U: unfiltered
X = A: filtered

Figure 1

In addition, the following information can be useful for engineering the braking chopper of Sinamics PM240-2.

Wiring a braking resistor to Sinamics PM240-2
The information of wiring a braking resistor can be found from the HIM Chapter 4 and Chapter 8.6.
General braking chopper engineering guideline, see 22101908
Even so the guideline above is released for Micromaster, the engineering principle is still valid for Sinamics PM240-2. However, the parameterization (e.g., P1237 to define the braking chopper duty cycle profile) and I²t protection are not applied for Sinamics PM240-2 anymore.

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Drive Technology Converters Low voltage converters Standard Performance Frequency Converter SINAMICS G120 Built-In Units Power Modules

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