Matrix-orbital LK204-25 Legacy Uživatelský manuál stáhnout pdf (Strana 12)

Figure 2-10 General Purpose Outputs

Maximum allowable current is 20 mA, 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. Solder a small

jumper wire (wirewrap wire is good) from the feedthrough hole to the corresponding negative pin for the

GPO in question.

Jumper wire

Figure 2- 11 Bypassing 240 ohm resistor

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).

LK204-25 rev 1

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Matrix-orbital LK204-25 Legacy Uživatelský manuál Strana 12