Tibbo EM1000 - M1 S: Four 24 V Isolated Inputs, Common Ground

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299 Programmable Hardware Manual (PHM)

There are three green LEDs which are connected to three control lines. LEDs light

up for the LOW state of control lines (i.e. when current passes through the diodes

of the opto-couples).

7.2.9.15

#04-8, M1S: Four 24V Isolated Inputs, Common Ground

Function: Four opto-couple inputs with the '-' terminal connected to the system

ground, independent '+' terminals

Form factor: M1S

Category: Input module

Special needs: ---

Power requirements: 5V/40mA

Mates with: #19, #20, #21 (limited use)

See also: #04-1, #04-2, #04-3, #04-4, #04-05, #04-06, #04-07, #54

Details

This Tibbit is optimized for the nominal input voltage of 24V. If no external resistor is

added these inputs activate at about 13V. Forward current should not exceed

10mA, and this caps the maximum input voltage at around 30V. Add external

resistors if you need to apply higher input voltage.

Note that these are not "isolated inputs" -- they share the ground line with the rest

of your system. Still, the optical stage isolates your system from noise, ESD, spikes,

and other external influences.

Combine this Tibbit with terminal block devices -- #20 (nine terminal blocks) or #21

(four terminal blocks).