Data Value Unit
Connections terminals 1.8 ... 4.8 (UP) +24 V
Connections terminals 1.9 ... 4.9 (ZP) 0 V
Rated value (-15 %, +20 %, without ripple) 24 V DC
Max. ripple 5 %
Protection against reversed voltage Yes
Rated protection fuse for UP (fast) 10 A
Electrical isolation per module
Mechanisms in which I/Os are processed periodically refreshed
Current consumption from UP at normal operation with +
24 V DC (for module electronics)
0.18 A
Inrush current from UP at 30 V (at power up) 0.1 A2s
Inrush current from UP at 24 V (at power up) 0.06 A2s
Data Value Unit
DC supply interruptions < 10 ms
Time between 2 DC supply interruptions, PS2 > 1 s
Data Value Unit
Operating temperature* 0 ... +60 °C
Storage temperature -40 ... +85 °C
Transport temperature -40 ... +85 °C
Humidity without condensation max. 95 %
Operating air pressure > 800 hPa
Storage air pressure > 660 hPa
Operating altitude < 2000 m above sea level
Storage altitude < 3500 m above sea Data Value Unit
Degree of protection IP 20
Housing according to UL 94
Vibration resistance acc. to EN 61131-2 (all three axes),
continuous 3.5 mm
2 ... 15 Hz
Vibration resistance acc. to EN 61131-2 (all three axes),
continuous 1 g *
15 ...150 Hz
Shock test (all three axes), 11 ms half-sinusoidal 15 g
MTBF 102 years
Data Value Unit
Number of input channels per module 16
Terminals of the channels I0 to I7 2.0 ... 2.7
Terminals of the channels I8 to I15 4.0 ... 4.7
Terminals of reference potential for all inputs (minus pole of
the process supply voltage, signal name ZP)
1.9 ... 4.9
Electrical isolation from the rest of the module (I/O bus) Yes
Input type acc. to EN 61131-2 Type 1
Input delay (0 ➔ 1 or 1 ➔ 0), configurable 1 ... 500 ms
Data Value Unit
Input signal voltage 24 V DC
Signal 0 -3 ... +5 V
Undefined signal > +5 ... < +15 V
Signal 1 +15 ... +30 V
Data Value Unit
Input voltage +24 V, typically 7 mA
Input voltage +5 V > 1 mA
Input voltage +15 V > 4 mA
Input voltage +30 V < 8 mA
Data Value Unit
Number of test pulse channels per module (transistor test
pulse outputs)
Terminals of the channels T0 to T3 1.0, 1.2, 1.4, 1.6
Terminals of the channels T4 to T7 3.0, 3.2, 3.4, 3.6
Terminals of reference potential for all test pulse outputs
(minus pole of the process supply voltage, signal name ZP)
1.9 ... 4.9
Terminals of common power supply voltage for all outputs
(plus pole of the process supply voltage, signal name UP)
1.8 ... 4.8
Output voltage for signal 1 UP - 0.8 V
Length of test pulse 0 phase 1 ms
DI581-S
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