07AC91 ABB input and output unit

Model ABB 07AC91
Series AC31 PLC, CS31 bus remote I/O
Module Type Analog Input/Output (AI/AO) Module
Power supply 24 VDC
Working temperature -20 ° C to+60 ° C
Protection level IP20
Dimensions 125 mm × 75 mm × 25 mm
Weight 0.2 kg
Bus interface CS31 (RS-485), electrical isolation
Configuration method DIP switch setting working mode
2、 Dual mode channel configuration (key)
1. 12 bit mode (default, high precision)
8-channel analog input (AI): single channel independent configuration
Signal: ± 10 V/0… 20 mA/4… 20 mA
Resolution: 12 bits
Accuracy: ± 0.02% F.S. (25 ℃)
8-channel analog output (AO): single channel independent configuration
Signal: ± 10 V/0… 20 mA
Resolution: 12 bits
Response time:<1 ms
2. 8-bit mode (high-density)
16 channels: Paired configuration as AI or AO
Signal: 0… 10 V/0… 20 mA
Resolution: 8-bit
Data packaging: 2 analog values/1 bus word
3、 Electrical and Performance Parameters
Input current: AI typical 2-10 mA
Output load:
Current type (0/4-20 mA): ≤ 500 Ω
Voltage type (0/± 10 V): ≥ 10 k Ω
Isolation: CS31 bus and on-site electrical isolation
Sampling rate: 100 times per second per channel
Wiring: Screw terminals, pluggable; Wire diameter 0.08-1.5 mm ²
4、 Typical applications
Process control (temperature, pressure, flow acquisition)
Mechanical automation, packaging production line
Metallurgical, chemical, power, and water treatment systems
Building automation (temperature, humidity, pressure difference monitoring)

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