ABB AC500-S Safety User Manual page 148

AC500-S Safety Modules
AI581-S analog safety input module > Circuit examples
2 analog sensors (4 ... 20 mA), external sensor power supply
2-channel evaluation
Sensor power supply on channel 1 (I0)
Sensor power supply on channel 2 (I2)
1), 2)
SIL/Cat./PL
3)
SIL
Sensor
4...20mA
Sensor
4...20mA
24VDC
Fig. 58: Circuit example AI581-S, 2 analog sensors (4 ... 20 mA)
1) - MTTFd = High, DC = High
2) - Max. reachable (ISO 13849, IEC 62061, EN 954) ➔ without error exclusion (you can reach higher levels
up to PL e, SIL 3, Cat. 4 with error exclusion)
3)
- Max. reachable SIL acc. IEC 61508 (Type A components are required) ➔ without error exclusion (you
can reach higher levels up to SIL 3 with error exclusion)
148
GND
In AI581-S module
External 24 V DC (Sensor)
External 24 V DC (Sensor)
SIL 3/Cat.4/PL e
SIL 3
1.0 I0- PWR 2.0I0+ 3.0 I2-
1.1 FE 2.1 3.1 FE
1.2 I1- 2.2I1+ 3.2 I3-
1.3 FE 2.3 3.3 FE
1.4 2.4 3.4
ADDR
1.5 2.5 3.5
x10H
4
3 5
6
2
1.6 7 2.6 3.6
1
0 8
F 9
E A
3.7
1.7 2.7
D B
C
ADDR
1.8 UP 2.8UP 3.8 UP
x01H
4
5
3
2 6
2.9ZP
1.9 ZP 3.9 ZP
1 7
0 8
F 9
A
E
D
B
C
ERR1
UP 24VDC 2W
1.0 2.0
1.1 2.1
1.2 2.2
1.3 2.3
1.4 2.4
1.5 2.5
1.6 2.6
1.7 2.7
1.8 2.8
1.9 2.9
AC500-S
AI581-S
4.0I2+
4.1
4.2I3+
4.3
4.4
4.5
4.6
4.7
4.8UP
4.9ZP
ERR2
4SAI
Safety Analog Input
3.0 4.0
3.1 4.1
3.2 4.2
3.3 4.3
3.4 4.4
3.5 4.5
3.6 4.6
3.7 4.7
3.8 4.8
3.9 4.9
30.03.2017