Issue
Maximum Limits for SmartStruxure Lite Design (Scalability, Capacity)
Product Line
EcoStruxure Building Expert
Environment
SmartStruxure Lite Multi-Purpose Manager (MPM)
Cause
What are the maximum number of communication between managers and end device
Resolution
Guidelines: number of end devices per node
Wired
● 6 wired inputs (Ohms / Volts, Analog or Digital)
● 6 wired outputs (4 analog 0-12VDC, 2 digital) The analog output ports has a maximum nominal load of 50mA each.
● Need more? Modbus I/O extenders, SEC-TE, etc.
Wireless devices
● In theory: almost unlimited (no physical constraints)
● In practice: limited by range and strength of wireless signal
● EnOcean: Rule of thumb is within room (up to 75ft in building – line of sight)
● ZigBee: Rule of thumb is within room (up to 150ft in building – line of sight)
Limited by application
● Frequency of transmission
● Efficient handling of data queues
Guidelines: number of end devices per node
BACnet - with the current basic client capabilities, the maximum number of devices supported on a single BACnet network is 1000.
Modbus
Limitations for ModBus connectivity per MPM is 31 devices but depends on polling rate and amount of points:
● Using pre-defined objects, polling rate is 30s / device
● Using Lua script, polling rate variable
ZigBee or EnOcean for the end devices?
ZigBee
● Longer range
● Reliability built-in the protocol (ack, retries, …)
● Requires a battery
● Multiple channels available (possible to isolate networks / groups)
EnOcean
● Self-powered (no battery)
● Easy to deploy
● Lower range
● Reliability must be ensured at the application level
● No retries
● ZigBee coordinator is a device that sets up the network, is aware of all the nodes within its network. Every ZigBee network must contain a network coordinator.
● ZigBee router can act as an intermediate router, passing on data from other devices.
● ZigBee end-device is part of the network, but doesn’t re-route information to neighbors.
How many devices can I use?
ZigBee
● A ZigBee network should not have more than 75 ZigBee devices in total (coordinator, router and end devices);
● A ZigBee network should not have more than 24 ZigBee routers (+1 coordinator)
● A ZigBee node (coordinator or router) should not control more than 10 peripheral end devices.
EnOcean
● Using pre-built objects:
● 4 Thermostats
● 20 Switches
● 20 Relays
● The maximum number of devices added to each MPM is 49
●The maximum number of EnOcean devices added to each MPM is 49
●The maximum number of EnOcean devices with the same EEP added to each MPM is 49 .This only applies to firmware 2.13.1 and later, the limit for previous firmware is 20. An Exception is the following limits for devices/widgets per MPM:
20 EnOcean Switches
20 EnOcean Relays
4 EnOcean Thermostats
The AV and BV variables
The MPM-UN controller comes with 100 AV's and 100 BV's.
MPM has capacity for up to 700 AV's and 700 BV's. After the initial 100 are consumed, add Value Banks of 100 for each AV and BV. Value Banks will be added as sub-devices under the main MPM.
Maximum data Points: MPMs can have up to 750 data points per monitor.
What is the maximum size for background graphics?
The maximum size of a background picture (in dashboard or section map) is 2Mbyte with a maximum resolution of 1920 x 1080 (Width x Height).
For analog inputs with a signal range in Ohms has no reading limit. You just need to configure the table in the AIC object assigned to referred input.
