MC311 Minicom
Maximum of 40 inputs as follows:
8 universal (analogue or digital) inputs.
Configured as analogue inputs:
Full scale range 0 - 10 volts
Resolution 8 bit (40mV per step)
Configured as digital inputs:
Dry switch closure to ground. Sinks about 2mA when switch closed. Outputs
Maximum of 40 outputs as follows:
4 digital outputs and 4 universal analogue or digital outputs.
Individual LEDs on each output. LED intensity indicates output level.
Digital outputs switch between 0 and 12 volts. Current source capability is up to 100mA per output, limited by power supply capacity. Current sink current is up to 300mA per output. Positive DC voltage only. An optional relay output board can be used with the processor.
Analogue outputs are pulsewidth modulated 0 to 10 volts. Current source and sink specifications as per digital outputs.
Other hardware features
On-board battery backed real time clock keeps track of current date and time.
Clock accuracy is better than ± 1 minute per month.
Battery backed memory saves system setups and logged data.
High quality detachable input/output terminals for ease of connection.
Onboard firmware
The MC311 minicom contains a rich set of algorithms which can be used to implement complex control systems without the need for writing any programs. This allows the MC311 to keep a plant running even if the network it is connected to fails.
Communication to the MC311 is either via a standard RS232 link at 9600 baud or via Sphere Systems 41 kb RS485 network.
The MC311 implements time clocks for the time control of outputs.
The MC311 has extensive data logging capabilities and all analog input and output channels can be logged at user selectable data rates. Digital inputs and outputs can also be logged.
The MC311 implements after-hours fallback, economy plant on/off cycling, load shedding and lead/lag algorithms.
8 level priority system for both analogue and digital outputs.
The MC311 implements a comprehensive alarm system.
Dimensions: 62mm wide x 208mm long
Board mounting: Snap track - no screws required.
Environmental: 5 - 50C, 10% - 90% non-condensing
Nominal 15V DC @ 250mA, unregulated via screw terminals or Plug In connectors.
Data - 20 way Flat ribbon. 3 metres maximum.
All electronics and power supplies can be mounted in plastic or metal sealed enclosures to meet environmental requirements. No fans, heat sinks or other heat dissipation methods are required. Field wiring connections can be provided through plugs, sockets or penetrations in the enclosure meeting expected environmental requirements.
Enclosures will be sized to accommodate the equipment to be housed.
Specifications are subject to change without notice.