simatic s7-400 - Teknika Otomasyon

SIMATIC S7-400
Digital modules
© Siemens AG 2008
SM 421 digital input modules
5
■ Technical specifications (continued)
6ES7 421-7BH01-
0AB0
Input current
• for signal "0", max.
(permissible quiescent current)
6ES7 421-1BL01-
0AA0
6ES7 421-1EL00-
0AA0
6ES7 421-1FH20-
0AA0
1.3 mA 1mA 6mA;
AC: 6 mA; DC: 2 mA
6ES7 421-7DH00-
0AB0
• for signal "1", typ. 6 mA; 6 to 8 mA 7mA 2 mA; 2 to 5 mA 10 mA;
4 mA; 4 to 10 mA
at 120 V: 10 mA AC,
1.8 mA DC;
at 230 V: 14 mA AC, 2
mA DC
Input delay (for rated value of
input voltage)
• for standard inputs
- programmable Yes Yes
- Rated value 0.5 ms; 0.5 / 3 / 10 /
20 ms
Cable length
• cable length, shielded, max. 1 000 m;
1000 m/3 ms;
70 m/0.5 ms;
30 m/0.1 ms;
30 m/0.05 ms
1 000 m 1 000 m 1 000 m 1 000 m
• Cable length unshielded, max. 600 m;
600 m: 3 ms;
50 m: 0.5 ms;
20 m: 0.1 ms;
20 m: 0.05 ms
Encoder
Connectable encoders
600 m 600 m 600 m 600 m;
600 m: 3, 10, 20 ms;
100 m: 0.5 ms
• 2-wire BEROS Yes Yes Yes Yes Yes
- permissible quiescent
current (2-wire BEROS), max.
3mA 1.5 mA 1mA 5mA;
AC: 5 mA
0.5 mA;
0.5 to 2 mA
Status information/alarms/
diagnostics
Alarms
• Diagnostic alarm Yes; parameterizable Yes; parameterizable
• Process alarm Yes; parameterizable Yes; parameterizable
Diagnoses
• Diagnostics
Yes;
internal/ external fault
Yes;
internal/ external fault
Isolation
Isolation checked with 500 V DC 500 V DC 1500 V AC 1500 V AC 1500 V AC
Isolation
Galvanic isolation, digital inputs
• between the channels, in 8 32 8 4 1
groups of
• between the channels and the Yes Yes Yes Yes Yes
backplane bus
Dimensions
Dimensions
• Width 25 mm 25 mm 25 mm 25 mm 25 mm
•Height 290 mm 290 mm 290 mm 290 mm 290 mm
•Depth 210 mm 210 mm 210 mm 210 mm 210 mm
Weights
• Weight, approx. 600 g 500 g 600 g 650 g 600 g
5/64 Siemens ST 70 · 2009