Safety Characteristics - Festo CPX-FVDA-P2 Operating Instruction

Safety characteristics

1)
Max. cyclical request rate
Mean time to dangerous failure (MTTF )
d
Probability of a dangerous failure per hour
(PFH )
D
Max. useful life
Min. request rate for each output channel
(CH0, CH1, CH2)
– With test pulses switched on
– With test pulses switched off
Measures to avoid common cause failures
(CCF)
Safety protocol
Safe shutdown of the output channels
IEC 61508
EN ISO 13849
EN 62061
1) In order to guarantee the safety level, a minimum switch-on period of 1 minute must be ensured every 8
operating hours for each output channel used.
2) Profile for Safety Technology on PROFIBUS DP and PROFINET IO; Version 2.4, March 2007
Tab. 14: Safety characteristics
Please note that compliance with the named standards is limited to the output
module CPX-FVDA-P2. From the perspective of the output module, all disconnect-
able parts of a CPX terminal and/or valve terminal are treated as an external load.
Electrical characteristic values
Nominal operating voltage
Permissible voltage fluctuations
Operating voltage when tapping busbar 24 V
and 0 V (integrated reverse polarity protec-
VAL
tion)
Residual ripple (within tol.)
Voltage drop bypass time U
VAL
Intrinsic current consumption at nominal oper-
ating voltage
Undervoltage monitoring U
VAL
Overvoltage monitoring U
VAL
Electrical isolation between V (or 5 V CBUS)
EL/SEN
and V
VAL
Electrical isolation between output channel
(CH0, CH1, CH2) – and internal bus
Electrical isolation between output channel –
output channel
Potential reference of the output channels
Max. power supply CH0, CH1, CH2 (load current
per output channel)
Max. load current per unswitched voltage U
(auxiliary supply)
Max. peak current per output channel
Max. total current per module
Max. switching frequency of the output channels
Max. voltage drop per output channel under con-
tinuous load
Wire break detection (CH0, CH1, CH2)
Max. cable length (CH1, CH2)
Max. load capacity against FE
Max. load capacity P-M
Max. load inductivity
Fuse protection (short circuit)
Max. test pulse duration
Max. voltage drop during test pulse
1) When using the output module in the pneumatic interface - without external voltage zones - deactivate the
wire break detection function.
Tab. 15: Electrical characteristic values
CPX-FVDA-P2
[rpm] 1
> 750
[years]
< 1.0 x 10
[1/h] –9
[years] 20
[1/week] 1
[1/day] 1
– Comply with operating voltage limits
– Comply with temperature range
è Tab. 17 Further characteristic
values
è Fig. 7
– Combine a maximum of 2 output
channels in a common safety pilot cir-
cuit
PROFIsafe Profile version 2.4
Level of safety function
SIL 3
Cat. 3, PL e
SIL CL 3
CPX-FVDA-P2
[V DC] 24
[%] –15 ... +20
[V DC] 20.4 ... 28.8
VAL
[Vss] 2
[ms] 2
[mA] typ. 65 for valves (from U
typ. 25 for electronics (from U
[V] < 19.5 for t>250 ms
> 29.5 for t>250 ms
[V]
[V rms] min. 500
Yes, with intermediate supply
no
U
VAL
[A] 1.5
è Fig. 7
[A] 2.5
VAL
5 for t < 30 ms
[A]
[A] 5
[Hz] 1
[V] 0.6
can be parameterised, detection
point I approx. 50 mA
L
[m] 200
[nF] 400
[μF] 22
[mH] 1000 at 150 mA, 100 at 600 mA;
Characteristic curve
è Fig. 4
Integrated electronic fuse
[μs] 300
[V] 6
2)
Fig. 4: Maximum permissible load inductivity at the output channels
Functional characteristic values
Module code
Sub-module code
Compatible with fast start-up (FSU)
Start-up time until module ready
Diagnostics of external channel fault
Response time for external channel errors
Response time to switch off command (typ.)
Internal PROFIsafe processing time (T
Tab. 16: Functional characteristic values
NOTICE
• Use the following diagram if the load current is known.
)
VAL
)
EL/SEN
Fig. 5: Internal response time as a function of the minimum load current
NOTICE
• Internal response time as a function of the resistive minimum load
1)
Fig. 6: Internal response time as a function of the resistive minimum load
CPX-FVDA-P2
193d (C1h)
8d (08h)
Yes
< 2
[s]
Periodic inspection
– for function
– for external supply
– for cross circuit
[min] < 1
< 10
[ms]
< 50
) [ms]
DAT
I [mA]
Last
R [Ohm]
Last