SECTION 1
COMMUNICATION INTERFACE MODULE
PM055 Rev 2 00/08/31
Thomson Technology
7
6. Port
3A/B
Detail pin numbers and usage designations for Port number 3A/B are as follows:
RS-485 half-duplex
(Pending)
RS-422 full-duplex
(Pending)
RS-232
(DCE)
Direction
RJ45 #
DB9 #
Sa Txa
CD
Output
1
1
Sb Txb
Tx
Output
2
2
Sb' Rxb
Rx
Input
3
3
Sa' Rxa
DSR
Input
4
4
Ground Ground
GND
Passive
5
5
NC NC
DTR
Output
6
6
NC NC
CTS
Input
7
7
NC NC
RTS
Output
8
8
RI
n/c
n/a
9
7.
CIM Operation Functions
The CIM module provides the following main functions when used in a communication
system:
RTU & Modbus™ Device Interface: The CIM is the main communication interface
component between a Modbus™ compliant device and the remote terminal units. The
CIM provides the necessary hardware interface (i.e. COM Ports) as well as the
Modbus™ software protocol interface.
Protocol Data Processing: The CIM receives incoming communication signals from
various types of RTUs and processes the data into the specific Modbus™ language as
required for the application. The processed data then gets transferred to the applicable
port and transmitted to a remote Modbus™ compliant device.
CIM Configuration: The CIM stores vital information in non-volatile FLASH memory
pertaining to a specific RTU site as defined by the user. Stored information includes, site
name, site passwords, and auto callout phone numbers (3).
RTU Polling: The CIM module will automatically poll connected RTUs to determine their
operating status and to signal an auto callout (callout is only operational when the
modem feature is operational) to the remote Modbus™ compliant device to alert a user
of an abnormal condition.
Содержание CIM 3.0
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