292Tibbo Project System (TPS)
© Tibbo Technology Inc.
7.2.9.8
#04-1, M1S: Two Isolated Inputs
Function: Two optically isolated inputs with independent terminals. Inputs are fully
isolated from system ground.
Form factor: M1S
Category: Input module
Special needs: ---
Power requirements: 5V/30mA
Mates with: #19, #20, #21
See also: #04-2, #04-3, #04-4, #04-05, #04-06, #04-07, #04-08, #54
Details
If no external resistor is added these inputs activate at about 2V. Forward current
should not exceed 10mA, and this caps the maximum input voltage at around 5V.
Add external resistors if you need to apply higher input voltage.
Combine this Tibbit with terminal block devices – #20 (nine terminal blocks) or #21
(four terminal blocks).
LEDs
There are two green LEDs which are connected to two control lines. LEDs light up
for the LOW state of control lines (i.e. when current passes through the diodes of
the opto-couples).
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