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Nexus Monitor with Internal Modem Option
10.1: Hardware Overview
The Nexus 1250/1252 Monitor with the INP2, Internal Modem Option, has all the components of the
standard Nexus Monitor PLUS the cabability of connecting to a PC via standard phone line. No
additional hardware is required to establish a virtually unlimited connection from a PC to a Nexus
1250/1252 with INP2, Internal Modem Option.
If desired, the internal expansion port of the Nexus 1250/1252 can be configured with an internal
56K bps modem. This gives Nexus Dial-In and Dial-Out capability without additional hardware.
This is ideal for small remote applications.
When the device is configured with INP2 , Port 2 becomes a gateway allowing other Modbus-based
serial devices access to the phone line. Additional connections can include a daisy chain of standard
Nexus Monitors. A Daisy Chain can include up to 31 meters. If more are desired, the installation of
a repeater allows additional meters. (See section 5.14 for repeater details.)
Daisy Chain
Electro Industries/GaugeTech
Chapter 10
RS-485
Figure 10.1: Nexus with Internal Modem Option
Doc # E107706 V1.25
RJ-11
Originate Modem
PC
(or Internal to PC)
10-1
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