Emerson ROC827 instruction manual Dial-up Modem Communications Module, EIA-485 RS-485 Module

ROC827 Instruction Manual

Figure 5-5. EIA-422/485 (RS-422/485) J4 Jumper

Table 5-11. EIA-422 (RS-422) Module

Jumper	Terminated		Not Terminated
	TER Out Half	Full	TER Out Half Full
J3		x			x
J4	x			x
J5		x			x
J6	x			x

Table 5-12. EIA-485 (RS-485) Module

Jumper	Terminated	Not Terminated
	TER OUT Half	Full TER OUT Half Full
J3	x			x
J4	x		x
J5	x			x
J6	x		x

5.9Dial-up Modem Communications Module

The dial-up modem module interfaces to a Public-Switched Telephone Network (PSTN) line, and requires a telephone line connection. The module provides a telephone interface on the host port that is capable of both answering and originating telephone calls. The module also provides electronics that conserve power when the phone line is not in use.

Issued Mar-06 Communications 5-12