Microlink 3000 is a modular system for measurement and control. The 301x range of modules provide digital input to the computer and output control by the computer. It features both logic level TTL and 5 V CMOS inputs and outputs, and also switching functions through relays and transistors. The range comprises 6 modules. Each module has 2 versions, one having light-emitting diodes to show the state of the input or output lines. Labels for the LEDs can be engraved on a blank panel.
There are 6 modules in the 301x range
The modules plug into a Microlink frame.
The 3010 provides 32 general purpose input and output lines, arranged as 4 ports of 8 lines. Each port can be either an input or an output port. The outputs can drive up to 15 LSTTL loads (6 mA). At power-up all lines are configured as inputs.
The 3010 has 4 auxiliary input lines. These normally provide a valid data line associated with each of the ports. They are contact closure compatible.
The 3011 module provides 4 independent change-over power relays, each with a 0.1 uF + 100 ohm suppression network.
When you use power relays for switching significant loads, note that the contact ratings quote non-reactive loads. This is because inductive or capacitive loads produce current and voltage spikes when they are switched which may be many times the steady state load. If the load to be switched is highly inductive or capacitive, then either the rating of the relay should be much reduced, or measures should be taken to limit the size of the switching transients by addition of further diodes and so on. At power-up all relays are open.
Operating time 8 msec Release time 2.5 msec Contact rating 10 A at 30 V DC or 230 V AC
The 3012 provides 8 independent change-over reed relays. At power-up the relays are in the normally closed position. The relays have a contract resistance of 0.15 Ohm and an insulation resistance coil to contact of 10 000 MOhm. Reed relays are commonly used as signal switches or control switches.
Operating time 1 msec Release time 1 msec Contact rating at 200 V DC 3 W non-reactive
The 3013 provides 16 isolated digital input lines. The inputs will switch TTL to 24 volts and require an input current of 5 mA. The module provides 240 V AC isolation between inputs and the system.
The 3014 provides 16 isolated digital output lines. The outputs will sink 1.5 mA and switch 30 V. The module provides 240 V AC isolation between outputs and the system.
The 3015 provides 4 independent coaxial relays suitable for switching video signals of up to 450 MHz. The front panel has BNC sockets for normally open, normally closed and pole for each relay. The characteristic impedance of the socket is 50 Ohm and the maximum working voltage is 250 V at 50 Hz.
Operating time 20 msec Release time 8 msec Contact rating 1 A at 250 V AC
You can control the Microlink 3000 with Windmill, Streamer, SCAN1000 or Excel software. The serial Microlinks (those that communicate over RS232 or RS485) can be OPC-enabled. With the addition of their OPC-server software you can use them with any OPC client software such as Hexatec's Saturn SCADA software and National Instruments' LabVIEW. Another option is to program the Microlink yourself: ask for our programming manuals and example programs.
For more details on the Microlink 3000 system: