Black Box DB9F/RJ-45 (IC624A-M) manual Switch S1 Summary Table factory defaults in bold

RS-232/485 CONVERTER

3.1.1DIP SWITCH S1 SETTINGS

DIP switch S1 is used to configure receive impedance (termination), 2-wire/4-wire operation and “echo” enable/disable. Table 3-1shows the factory-default settings for switch S1. Following Table 3-1is a detailed description of each switch.

Table 3-1. Switch S1 Summary Table (factory defaults in bold)

Position	Function	OFF Position	ON Position
S1-1	RCV impedance (termination)	16 K ohms, typ.	120 ohms
S1-2*	2-wire/4-wire	4-wire	2-wire
S1-3*	2-wire/4-wire	4-wire	2-wire
S1-4	Echo Mode	Echo OFF	Echo ON

*Switches S1-2 and S1-3 should be switched simultaneously.

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