Matrix-orbital LK202-25 Legacy Uživatelský manuál stáhnout pdf (Strana 11)

LK202-25 rev 3 11

Each output is wired as shown in Figure 2-8. The + terminal is connected directly to the module positive

supply, the – terminal is connected through a 240 ohm current limiting resistor and the electronic switch

to ground.

+ 5 VDC

240 ohm current limiting resistor

load

GPO 1

GPO 2

GPO 3

GPO 4

GPO 5

GPO 6

Power

Figure 2-8 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 2-9 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).

1 2 ... 6 7 8 9 10 11 12 13 14 15 16 ... 36 37

Žádné komentáře

Matrix-orbital LK202-25 Legacy Uživatelský manuál Strana 11