POLVISION
38 Harris Road, MALAGA 6090
WESTERN AUSTRALIA
Phone:
08 9209 2554 (AU)
+61 8 9209 2554 (international)
041 791 8873 (mobile)
E-mail:
Miniature Logic Controller
The POLVISION Miniature Logic Controller is a microprocessor based unit designed for continuos operation in any environmental conditions. It acts as an interface between digital/analog sensors and controls and a host computer.
MLC_V4.0
The MLC_V4.0 is connected to the computer via one half duplex serial channel.
This channel can be of the RS-232 type at short distances (up to 15m) or of the RS-485 type for distances up to 1000m.
MLC_V4.0 is a low current device that can be powered from the mains using separate mains adaptor or by solar panels.
Total power consumption of the MLC_V4.0 is below 0.5W.
Specifications
| Digital Input/Output: | 8, CMOS, 0 - 5V |
| Analog Inputs: | 3, 8bit resolution, 0V - 5Vdc |
| On-board Temperature Sensor: | 5°C - 70°C, resolution 1°C |
| External Temperature Sensor: | 5°C - 70°C, resolution 1°C |
| Communications Port: | RS-232 - 3 wire @ 9600kB,
or RS-485 - 2 wire @ 9600kB |
| Temperature Range: | 0°C - 70°C |
| Humidity | up to 90%, no condensation permissible |
| Power Requirement: | 8 - 15Vdc unregulated |
| Power Consumption: | < 0.5W |
Note: Standard digital outputs of the MLC_V4.0 are of 0-5V TTL/CMOS logic with maximum source current of 100mA and sink current of 20mA.
Set of Commands of the Miniature Logic Controller MLC_V4.0
A command consists of the start character (<), unit unique number, a command identifier, parameters and the end character (>).
Each command has 6 characters.
| <9d2r> |
Unique number is 9 Digital Input/Output: 2 (0 - 7) Function: Read Return string is: <9D2=L> or <9D2=H> |
| <9d3l> |
Unique number is 9 Digital Input/Output: 3 (0 - 7) Function: Set to "0" (L) Return string is: <9D3=L> |
| <9d4h> |
Unique number is 9 Digital Input/Output: 4 (0 - 7) Function: Set to "1" (H) Return string is: <9D4=H> |
| <9an1> |
Unique number is 9 Analog input: 1 ( 0, 1 or 2) Function: Read Return string is: <9A1=FF> for 5Vdc, <9A1=00> for 0Vdc |
| <9an3> |
Unique number is 9 Analog input: 3 (3 = on board temperature sensor) Function: Read Return string is: <9A3T=25C> |
| <9an4> |
Analog input: 4 (4 = external temperature sensor) Function: Read Return string is: <9A4T=23C> |
| <Xccc> or <xccc> |
Command to read unique number of a card Only one card can be connected !!! Return string is: <9> |
| ? |
Sets beginning of a command string Note: It is strongly recommended that the "?" command (3Fh) is sent prior to any other command. |
Options: 12bit Analog/Digital Converter
The 12bit Analog-to-Digital converter is based on the LTC1288 micropower, successive approximation sampling A/D IC. It is mounted externally to the MLC_V4.1 and is supplied from an on-board very stabile voltage source.
| <9p00> |
External 12bit A/D Channel 0 Function: Read Return string is: <9P0FFF> |
| <9c00> |
External 12bit A/D Channel 1 Function: Read Return string is: <9C0FFF> |
Ordering information, product availability and pricing
Please email to ask for product information, pricing or availability.