User manual

4 Conguration | Current demand and power supply
22 1432790000/08/12.2015Manual u-remote
4.5 Current demand and power supply
The u-remote system uses three internal current paths:
The I
SYS
system current path supplies the communication
part of the I/O modules; it is fed from the coupler input sup-
ply and cannot be interrupted by any module. The maximum
current-carrying capacity of II
SYS
allows a u-remote station to
be expanded with a maximum of 64 active modules without
having to refresh the power.
The I
IN
input current path supplies the input circuit of the
input modules as well as the connected II
S
sensors. The cur-
rent must be refreshed with UR20-PF-I (power feed in) mod-
ules as required. These UR20-PF-I modules isolate the input
current path towards the left (towards the coupler), and as a
result start a new electricity segment towards the right.
The I
OUT
output current path supplies the output circuit
of the output modules with power, as well as the con-
nected I
L
actuators. The current must be refreshed with the
UR20-PF-O (power feed-out), as required. These UR20-PF-O
modules isolate the output current path to the left (towards
the coupler), and as a result start a new electricity segment
to the right.
The design of the power supply being used
must take start-up peaks into account.
Power supply derating
The power supply is restricted according to the temperature.
The following values apply for the horizontal and vertical po-
sitioning of the u-remote station:
Horizontal Vertical
Coupler power
supply
60°C / 140°F : 2 x 8A
55°C / 131°F : 2 x 10A
55°C / 131°F : 2 x 6A
50°C / 122°F : 2 x 8A
Power-feed
module power
supply
60°C / 140°F : 1 x 10A 55°C / 131°F : 1 x 8A
Temperature-dependent values for the power supply
ATTENTION
Equipment may become damaged if improperly
rated circuit protection is used!
▶ In order to achieve spezification according to UL248-14
use a UL-approved Type-B automatic circuit breaker
(e.g. ABB Typ S201-B16) or use a fuse with a maxi-
mum of 10A protection (e.g. ESKA Art. Nr. 522.227).
ATTENTION
Equipment may become damaged by overcurrent!
▶ Auxiliary supplies as well as signal inputs and outputs
may not be used for supplying the station.