Fail-Safe Modules
7.8 1 F-RO DC24V/AC24..230V/5A Digital Electronic Module
ET 200S Distributed I/O System - Fail-Safe Modules
Installation and Operating Manual, 08/2008, A5E00103686-07
185
Technical Specifications
•
In the I/O area for inputs
2 bits
•
In the I/O area for outputs
--
Length of cable
•
Unshielded for load contact
200 m, maximum
•
Shielded for load contact
200 m, maximum
•
Control cable (input)
10 m, maximum
Maximum achievable safety class
•
In accordance with IEC 61508
SIL3
•
In accordance with EN 954
Category 4
•
In accordance with ISO 13849
PLe
Fail-safe performance characteristics
SIL3
•
Low demand mode (average probability of
failure on demand)
< 1.00E-05
•
High demand/continuous mode (probability of
a dangerous failure per hour)
< 1.00E-09
•
Acceptance ID
cULus, CE, C-Tick
Voltages, Currents, Potentials
Control voltage
20.4 to 28.8 VDC (supplied from fail-safe output of
an F-DO)
Total current at both channels
•
Horizontal installation
–
Up to 40 °C
–
Up to 50 °C
–
Up to 60 °C
8 A
6 A
5 A at max. control voltage 24.8 VDC
3 A at max. control voltage 28.8 VDC
•
Vertical installation
–
Up to 40 °C
6 A
Electrical isolation
•
Between channels and backplane bus
Yes
•
Between channels and control voltage
Yes
•
Between channels
Yes
•
Between channels/control voltage and shield Yes
Permissible potential difference between
•
Shield and ET 200S bus connection
75 VDC/60 VAC
•
Control voltage and shield
75 VDC/60 VAC
•
ET 200S bus connection and control voltage 75 VDC/60 VAC
•
Channel 1 and shield, ET 200S bus
connection, control voltage, channel 2
250 VAC
•
Channel 2 and shield, ET 200S bus
connection, control voltage, channel 1
250 VAC