User Manual

Technical specifications
A.4 Specifications for the digital inputs and outputs
Easy Book
302 Manual, 03/2014, A5E02486774-AF
A.4
Specifications for the digital inputs and outputs
A.4.1
24 VDC digital inputs (DI)
Table A- 25 Specifications for the digital inputs (DI)
Technical data
CPU, SM and SB
High-speed SB (200 KHz)
Type
• CPU and SM: IEC Type 1 sink
(Sink/Source)
• SB 1223: IEC Type 1 sink
(Sink only)
SB 1221 200 KHz and SB 1223 200 KHz:
Source
Rated voltage 24 VDC at 4 mA, nominal 24 VDC SB: 24 VDC at 7 mA, nominal
5 VDC SB: 5 VDC at 15 mA, nominal
Continuous permissible
voltage
30 VDC, max. 24 VDC SB: 28.8 VDC
5 VDC SB: 6 VDC
Surge voltage 35 VDC for 0.5 sec. 24 VDC SB: 35 VDC for 0.5 sec
5 VDC SB: 6 V
Logic 1 signal (min.) 15 VDC at 2.5 mA 24 VDC SB: L+ minus 10 VDC at 2.9 mA
5 VDC SB: L+ minus 2.0 VDC at 5.1 mA
Logic 0 signal (max.) 5 VDC at 1 mA 24 VDC SB: L+ minus 5 VDC at 1.4 mA
5 VDC SB: L+ minus 1.0 VDC at 2.2 mA
Isolation (field side to logic)
500 VAC for 1 minute
500 VAC for 1 minute
Isolation groups
• CPU: 1
• SM 1221 DI 8: 2
• SM 1221 DI 16: 4
• SB 1223 DI 2: 1
• SM 1223: 2
• SB 1221 DI 4: 1
• SB 1223 DI 2: 1
Filter times 0.2, 0.4, 0.8, 1.6, 3.2, 6.4, and 12.8 ms
(selectable in groups of 4)
0.2, 0.4, 0.8, 1.6, 3.2, 6.4, and 12.8 ms
(selectable in groups of 4)
Number of inputs on
simultaneously
• SM 1221 and SM 1223 DI 8: 8
• SM 1221 and SM 1223 DI 16: 16
• SB 1223 DI 2: 2
• SB 1221 DI 4: 4
• SB 1223 DI 2: 2
Cable length (meters)
• 500 m shielded, 300 m unshielded
• CPU: 50 m shielded for HSC
50 m shielded twisted pair