3 608 878 300 Tightening Technology | Bosch Rexroth AG 79/641
System 350 | 3 608 878 300/2019-03
Mains voltages
The BT356 card rack field has been designed for 230 V nominal voltage. The SB356 system box has
been designed for a nominal voltage of 380 V to 500 V (400 V at factory):
We recommend using autotransformers, as long as this is not forbidden by any other guidelines. Select
the transformer performance so that all of the card rack fields in a tightening cell can be powered up
together.
Power supply connected loads of card rack fields/system boxes partially equipped with tightening channels
If the card rack fields/system boxes are not fully equipped, the mains connected load can be configured
in accordance with the following tables.
Connected load
1-phase
Connected load
3-phase
Table 4–10:
BT356 SB356
Input nominal voltage 3(1
1
) x 230 V ± 10 %,
50 - 60 Hz
1 For connected loads (according to table 4–11) up to 1250 VA, the
connection can also be single-phase. If the connected loads are
higher, we recommend a 3-phase connection via a transformer.
3 x 400 V ± 10 %,
50 - 60 Hz
(380 V to 500 V)
2
2 Adjustable via X1N4 interface on SB356
NOTICE
Overvoltage
Destruction of devices
A transformer is always necessary if a BT356 is connected to an industrial network
(see also figure 4–29).
All three mains phases must be connected with a mains balanced to earth.
Table 4–11: Single-phase connected load depending on size and number of channels for card rack fields
Number of servo amplifiers in card rack field
1 2 3 4 5
LT353 and/or LTS350D with EC302 500 VA 700 VA 900 VA 1050 VA 1200 VA
LT353 and/or LTS350D with EC303 600 VA 950 VA 1250 VA – –
LT354 and/or LTS350D with EC304 700 VA 1200 VA – – –
LT355 and/or LTS350D with EC305 1200 VA – – – –
Table 4–12: 3-phase connected load depending on size and number of channels for card rack field/system box
Number of servo amplifiers in card rack field/system box
1 2 3 4 5 6
LT353 and/or LTS350D with EC302 500 VA 700 VA 900 VA 1050 VA 1200 VA 1350 VA
LT353 and/or LTS350D with EC303 600 VA 950 VA 1250 VA 1500 VA 1750 VA 2000 VA
LT354 and/or LTS350D with EC304 700 VA 1200 VA 1700 VA 2100 VA 2500 VA –
LT355 and/or LTS350D with EC305 1200 VA 1800 VA 2500 VA – – –
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