Software Owner's manual

Chapter 3
Installation
3–8
Modem Configuration Information Continued
You will need to check the modem’s user’s guide for the codes applicable to,
and appropriate for your modem.
Modem sites having more than one device are similar to sites with one
device except that a Catalog Number 1400–CC RS–232C to RS–485
converter must be used and the Powermonitor communications card must be
configured for RS–485 communications.
The connection diagram for this configuration is shown in Figure 3.4.
Telephone modems must be configured in the manner described on Page 3–7.
Figure 3.4
Modem Connection to Sites with One or More Powermonitors
Telephone
Network
Site 1
To Feeders,
Transducers, or
Pulse Initiations
Telephone
Line
Telephone
Line
Telephone
Line
Telephone
Line
Modem
RS–232C
RS–485
Powermonitor #1
Powermonitor #2
Powermonitor #32
To Feeders,
Transducers, or
Pulse Initiations
Catalog
Number
1400-CC
RS–232C
RS–485
Powermonitor #1
Powermonitor #2
Powermonitor #32
To Feeders,
Transducers, or
Pulse Initiations
RS–232C
RS–485
Powermonitor #1
Powermonitor #2
Powermonitor #32
Site 3
Site 2
IBM PC with Hayes Modem
RS–485
RS–485 RS–485
Modem
Modem
Catalog
Number
1400-CC
Catalog
Number
1400-CC
Connection To Multiple
Powermonitor Sites Via The
Telephone Network