D1032
- SIL 2 Switch / Proximity Detector Repeater Relay Output
G.M. International ISM0041-14
8
Functional Safety Manual and Application
Application for D1032Q
Input signal state
Pins 13-14 (In 1 - Ch.1) or 15-16 (In 2 - Ch.2) or
9-10 (In 3 - Ch.3) or 11-12 (In 4 - Ch.4)
Output relay contact state
Out 1 or Out 2 or Out 3 or Out 4
Proximity sensor is OFF or switch is open
Open (De-energized relay)
Proximity sensor is ON or switch is closed
Closed (Energized relay)
The input line is broken
Open (De-energized relay as safe state condition)
The input line is in short circuit
Open (De-energized relay as safe state condition)
Channel status
yellow LED state
OFF
ON
OFF
OFF
Channel fault
red LED state
OFF
OFF
ON
ON
Safety Function and Failure behavior:
D1032Q is considered to be operating in Low Demand mode, as a Type A module, having Hardware Fault Tolerance (HFT) = 0.
The failure behaviour of D1032Q is described by the following definitions:
□
fail-Safe State: it is defined as the output being de-energized (so that the output relay is de-energized).
□
fail Safe: failure mode that causes the module / (sub)system to go to the defined fail-safe state without a demand from the process.
□
fail Dangerous: failure mode that does not respond to a demand from the process (i.e. being unable to go to the defined fail-safe state), so that the output remains energized.
□
fail “No Effect”: failure mode of a component that plays a part in implementing the safety function but is neither a safe failure nor a dangerous failure. When calculating the SFF,
this failure mode is not taken into account;
□
fail “Not Part”: failure mode of a component which is not part of the safety function but which is part of the circuit diagram and is listed for completeness. When calculating the SFF,
this failure mode is not taken into account.
Failure rate date: taken from Siemens Standard SN29500.
Description:
For this application, input line fault (open or short) detection is enabled and the direct input to output transfer function is selected, setting the internal dip-switches in the following mode
(see pages 11-12 for more information):
OFF operation
ON operation
The module is powered by connecting 24 Vdc power supply to Pins 3 (+ positive) - 4 (- negative). The green LED is lit in presence of the power supply line. Input signals from field are
applied to Pins 13-14 (In 1 - Ch.1), Pins 15-16 (In 2 - Ch.2), Pins 9-10 (In 3 - Ch.3), Pins 11-12 (In 4 - Ch.4). The relay contact outputs are both normally open (or relay de-energized as
safe state condition) for OFF operation, while they are both closed (or relay energized) for ON operation.
The following table describes, for each channel, the state (open or closed) of its output when its input signal is in OFF or ON state, and it gives information about
turn-on or turn-off of the related channel status LED and channel fault LED:
Failure category
Failure rates (FIT)
λ
dd
= Total Dangerous Detected failures
0.00
λ
du
= Total Dangerous Undetected failures
58.13
λ
sd
= Total Safe Detected failures
0.00
λ
su
= Total Safe Undetected failures
149.34
λ
tot safe
= Total Failure Rate (Safety Function) =
λ
dd
+
λ
du
+
λ
sd
+
λ
su
207.47
MTBF (safety function, one channel) = (1 /
λ
tot safe
) + MTTR (8 hours)
550 years
λ
no effect
= “No Effect” failures
151.43
λ
not part
= “Not Part” failures
296.50
λ
tot device
= Total Failure Rate (Device) =
λ
tot safe
+
λ
no effect
+
λ
not part
655.40
MTBF (device, one channel) = (1 /
λ
tot device
) + MTTR (8 hours)
174 years
λ
sd
λ
su
λ
dd
λ
du
SFF
0.00 FIT
149.34 FIT
0.00 FIT
58.13 FIT
71.98%
PFDavg vs T[Proof] table
(assuming Proof Test coverage of 99%), with determination of SIL supposing module contributes >10% of total SIF dangerous failures:
PFDavg vs T[Proof] table
(assuming Proof Test coverage of 99%), with determination of SIL supposing module contributes
≤
10% of total SIF dangerous failures:
Failure rates table according to IEC 61508:2010 Ed.2 :
Failure rate table:
Systematic capability SIL 3.
T[Proof] = 1 year
T[Proof] = 3 years
PFDavg = 2.55 E-04 - Valid for
SIL 2
PFDavg = 7.65 E-04 - Valid for
SIL 2
T[Proof] = 10 years
PFDavg = 2.55 E-03 - Valid for
SIL 2
Dip-switch position
1
ON/OFF state
ON
2
ON
3
ON
4
ON
5
ON
6
ON
7
ON
8
ON
D1032Q
(Ch.1, Ch.2,
Ch.3, Ch.4)
Field Input: proximity is OFF
or switch is open
Field Input: proximity is OFF
or switch is open
Channel 1
Channel 2
Out 2
5
6 Common Channel 2-4
1
2 Common Channel 1-3
Out 1
Supply
24 Vdc
3 +
- 4.
Out 1 relay is de-energized,
out contact is open
Safety
PLC Input
13
14
In 1
15
16
In 2
Out 2 relay is de-energized,
out contact is open
Out 4
8
6 Common Channel 2-4
7
2 Common Channel 1-3
Out 3
Out 3 relay is de-energized,
out contact is open
Out 4 relay is de-energized,
out contact is open
Safety
PLC Input
Safety
PLC Input
Safety
PLC Input
D1032Q
(Ch.1, Ch.2,
Ch.3, Ch.4)
Field Input: proximity is ON
or switch is closed
Field Input: proximity is ON
or switch is closed
Channel 1
Channel 2
Out 2
5
6 Common Channel 2-4
1
2 Common Channel 1-3
Out 1
Supply
24 Vdc
3 +
- 4.
Out 1 relay is energized,
out contact is closed
Safety
PLC Input
13
14
In 1
15
16
In 2
Out 2 relay is energized,
out contact is closed
Out 4
8
6 Common Channel 2-4
7
2 Common Channel 1-3
Out 3
Out 3 relay is energized,
out contact is closed
Out 4 relay is energized,
out contact is closed
Safety
PLC Input
Safety
PLC Input
Safety
PLC Input
Field Input: proximity is OFF
or switch is open
Field Input: proximity is OFF
or switch is open
9
10
In 3
11
12
In 4
Field Input: proximity is ON
or switch is closed
Field Input: proximity is ON
or switch is closed
9
10
In 3
11
12
In 4
Channel 3
Channel 4
Channel 3
Channel 4
