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概念
产品：
AO-8, AO-V-8, AS-L, DI-16, DO-FA-12, DO-FC-8, AS-P, PS-24V, RTD-DI-16, UI-16, UI-8/AO-4, UI-8/AO-V-4, UI-8/DO-FC-4
功能：
I/O 通信, 硬件
产品版本：
2.0, 2.1, 3.0, 3.1
2019/5/22
I/O Bus Restrictions
The I/O bus imposes restrictions on the number of devices that can be connected to the bus and what type of devices that are allowed on certain positions.
The following restrictions apply to the I/O bus:
Position 1 reserved for a power supply
Position 2 reserved for a SmartX AS-P server or Automation Server
Maximum one SmartX AS-P server or Automation Server per I/O bus
Maximum 32 devices per I/O bus
注释：
Even when connected by an S-cable, no more than 32 devices are allowed on the I/O bus.
Terminal Bases
I/O Bus
I/O Bus Parts
Power Budget
Configuring an I/O Module