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3.3.1 ATEX & IECEx Marking
II 3 G
For Relay Modules:
II 3 G
3.4 Spring-style System Cabling
RSTi-EP modules (except HD modules) and network adapters are equipped with the spring-style
connector system. Single-strand and fine-strand lines with wire-end ferrules can be inserted without
the need for a tool. Lines with a cross-section measuring between 0.14 mm
16) can be connected.
The external dimensions of the crimped wire-end ferrules must conform to IEC‑60947-1.
3.5 Current Demand and Power Supply
The RSTi-EP system uses three internal current paths:
The I
system current path supplies the communication part of the I/O modules; it is fed from the
SYS
network adapter input supply and cannot be interrupted by any module. The maximum current-
carrying capacity of I
SYS
modules without having to refresh the power.
The I
input current path supplies the input circuit of the input modules as well as the connected I
IN
sensors. The current must be refreshed with EO-7631 (power feed in) modules as required. These EP-
7631 modules isolate the input current path towards the left (towards the network adapter), and as a
result start a new electricity segment towards the right.
The I
output current path supplies the output circuit of the output modules with power, as well as
OUT
the connected I
actuators. The current must be refreshed with the EP-7641 (power feed-out), as
L
required. These EP-7641 modules isolate the output current path to the left (towards the network
adapter), and as a result start a new electricity segment to the right.
Note: The design of the power supply being used must take start-up peaks into account.
3.5.1 Power Supply Derating
The power supply is restricted according to the temperature. The following values apply for the
horizontal and vertical positioning of the RSTi-EP station:
Network Adapter power supply
Power-feed module power supply
GFK-2958E
Ex nA IIC T4 Gc, DEMKO 16 ATEX 1591X
Ex nA IIC T4 Gc, IECEx ULD 16.0022X
Ta: -20 °C to +60 °C
Ex nA nC IIC T4 Gc, DEMKO 16 ATEX 1591X
Ex nA nC IIC T4 Gc, IECEx ULD 16.0022X
Ta: -20 °C to +60 °C
allows a RSTi-EP station to be expanded with a maximum of 64 active
Temperature-dependent Values for the Power Supply
60 °C / 140 °F : 2 x 8 A
55 °C / 131 °F : 2 x 10 A
60 °C / 140 °F : 1 x 10 A
RSTi-EP User Manual
Horizontal
Chapter 3: Configuration
and 1.5 mm
(AWG 26 –
2
2
Vertical
55 °C / 131 °F : 2 x 6 A
50 °C / 122 °F : 2 x 8 A
55 °C / 131 °F : 1 x 8 A
S
29
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