Telenetics MIU Dial or Leased Line modem with RS-485 - Manual (Page 3)

Install Op and Diags for MIU Modems and RS485 (0049-0002-010A) Page 1 of 16
1. PRODUCT OVERVIEW
The CIU (MIU\XXX485) is an industrial modem with an RS-232 to RS485 converter module for
direct connection to industrial RS485 Interface units. Though similar to commercial modems, the
MIUXXX\485 contains special features that make it particularly well suited for industrial
applications. (MIUXXX is for any dial or lease line modems such as MIU14.4L)
These capabilities include:
Environment The CIU has been designed explicitly for use in industrial environments.
In addition to an extended temperature range (-40 to +85 o C), the
MIUXXX\485 includes surge, shock, vibration, and safety parameters
superior to those of conventional commercial modems.
Industrial The CIU uses standard industrial connectors for RS485 data and RS232
interfaces. These connectors allow reliable interconnect to other
industrial components. Furthermore, the CIU data lines are provided at
RS-232 and RS485 signal levels for both stand-alone and embedded
applications.
2. PRODUCT DESCRIPTION
The CIU provides Dial telephone communication capabilities for the industrial
environment. It can be operated stand-alone or as a component of a larger industrial
system.
2.1 Telephone Interface
The CIU telephone interface operates over two wire lines available in North America. The
telephone line interface is environmentally benign, allowing use in Class I, Division 2
applications.
2.2 Data Interface
The CIU data interface provides RS-232 compatible serial signaling. The data interface
interconnects to industrial controllers at RS-232E, RS422 or RS485 data interface are
available as options.
2.3 Power
The MIU accepts either regulated 48.0 to 220 volts DC, or regulated 48.0 to 220 volt AC
power inputs. Unregulated 12.0 to 24.0 volt DC power input is available as an option.
2.4 Mechanical
The CIU consists of two printed circuit boards: A single two sided baseboard and a
RS485 module is a single two sided package 5-3/8 x 4 x 1-3/8 suitable for desktop or wall
mounting.
2.5 Surge
The MIUXXX\485 has double the surge protection of IEC801-4 voltage
requirements.
(5KVac)