Matrix-orbital LK162-12 Legacy Bedienungsanleitung PDF herunterladen (Seite 16)

LK162-12 rev 4 16

Figure 2-8 General Purpose Outputs

Maximum allowable current is 20mA, which is enforced by the current limiting resistor. If the device being

switched has a resistance of 240 ohms or more the corresponding resistor may be shorted.

Note: The GPOs do not have any over current or over/under voltage protection so care must be taken when

using them. For instance if the external device is a relay it must be fully clamped (using a diode and

capacitor) to absorb any generated back electro-motive force (EMF).

10 - 100 u

1N4001

Relay

coil

GPO

Figure 2-9 Clamping a Relay

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Matrix-orbital LK162-12 Legacy Bedienungsanleitung Seite 16