GE RSTi-EP

Chapter 3: Configuration
GFK-2958E RSTi-EP User Manual 29
3.3.1 ATEX & IECEx Marking
II 3 G Ex nA IIC T4 Gc, DEMKO 16 ATEX 1591X
Ex nA IIC T4 Gc, IECEx ULD 16.0022X
Ta: -20 °C to +60 °C
For Relay Modules:
II 3 G 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
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
2
and 1.5 mm
2
(AWG 26 –
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 ISYS system current path supplies the communication part of the I/O modules; it is fed from the
network adapter input supply and cannot be interrupted by any module. The maximum current-
carrying capacity of ISYS allows a RSTi-EP station to be expanded with a maximum of 64 active
modules without having to refresh the power.
The IIN input current path supplies the input circuit of the input modules as well as the connected IS
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 IOUT output current path supplies the output circuit of the output modules with power, as well as
the connected IL actuators. The current must be refreshed with the EP-7641 (power feed-out), as
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:
Temperature-dependent Values for the Power Supply
Horizontal
Vertical
Network Adapter 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