7.9.1 DC Bus topology
Fuse types see section "Fuses" on page 30. More information can be found on page
Fuses
in the Product-WIKI.
Connection with Y connectors
The sum of the rated currents for all of the servo amplifiers connected in parallel to an
S700 must not exceed 48 A. If, based on this, the upper current limit is not exceeded, this
amplifier (with 6 mm² connections) can be connected using a Y connector.
Without intermediate circuit fuses, other devices can become damaged or destroyed if,
for example, a device fails due to an internal short circuit. If multiple amplifiers are con-
nected in parallel, then it is usual to insert intermediate circuit fuses between groups of
amplifiers (with a group consisting of two or three devices, depending on the strength of
the current) in order to limit any possible consequential damage. Fuses cannot avoid
damage by current peaks completely.
Connection with busbars
This wiring does not require Y joints. If a device fails due to a short-circuit, only its inter-
mediate fuses are tripped and the rest of the network continues uninterrupted. The relati-
vely solid busbars can conduct significantly larger currents, because the compensating
current does not flow through the connector as above. For this reason, almost as many
servo amplifiers as desired can be connected in parallel in this form. This arrangement is
frequently also useful for connecting capacitor modules.
S701x2-S724x2 Instructions Manual 71
Kollmorgen 07/2014 Electrical installation
S700 S700 S700 S700 S700 S700
DC DC DC DC DC DC
S700 S700 S700 S700 S700 S700
DC DC DC DC DC DC
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