Maximum Number of Nodes |
31 in traditional systems, 62 in V2.1 |
Number of I/O Points |
248 I/O points (4In, 4Out per node) in V1.0, 434 (8In, 3Out per node) in V2.1 |
Maximum Cable Length |
100m without repeaters, 300m with repeaters |
Power |
24VDC |
Medium |
Unshielded 2 wire cable for both power and data |
Wiring Technology |
Insulation displacement for speed and ease of installation. |
Topology |
Tree Structure |
Typical Data Rate |
All 31 nodes can be interrogated in 5msec. 10 msec for 62 node systems. |
Error Detection |
The AS-i master automatically detects invalid slave transmissions and schedules repeats |
Configuration |
Slaves are automatically configured with a Slave Address by the Master or a Programming Tool. Masters can interrogate the network to identify connected slaves or receive an external list of slave addresses. |
Addressing |
Each slave gets a specific address set by the AS-i Master or Programming Tool |
Master-Slave Operation |
A Master polls each slave sequentially and awaits a response. |
Hot Swap of Slave Devices |
Supported |
Multiple Master Operation |
Not Supported |
Troubleshooting |
AS-i Masters automatically monitor system voltage levels and slave operation and report this data to the controller. |
PLC Programming |
No special knowledge of AS-i bus or device structure is required to program a PLC to use AS-i bus data. AS-i data is simply remote IO data to the PLC. |
Discrete Device Support |
Supported |
Analog Device Support |
Limited support in V1 and V2.1 using multiple bus cycles (12-bit analog across five bus cycles) |
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