Chatsworth Products Remote Infrastructure Management (RIM-1000) - Manual (Page 130)

Remote Infrastructure Management System - Version 1.0 / July 2014
130 www.chatsworth.com
4.2.1 EIA-232
The EIA-232 COM Port 1 on the RIM-1000 is used to connect the RIM-1000-as a Modbus Master-to one Modbus Slave device, or
it is used to connect a Modbus Master device to the RIM-1000 as a Modbus Slave. The Modbus EIA-232 (DTE) is active over COM1
(DB9 male connector). The EIA-232 port allows communications between the RIM-1000 and one other device (point to point
connection). The EIA-232 port has maximum cable length of 50 feet (15.2m).
Table 4.1 COM1 DB9 Male Pin Out
Figure 4.1 RIM-1000 Modbus EIA-232 Connection to an EIA-232 DCE Device
Pin Description
1 Data Carrier Detect
2 Receive Data
3 Transmit Data
4 Data Terminal Ready
5 Signal Ground
6 No Connection
7 Request to Send (internally connected to Pin 8)
8 Clear to Send (internally connected to Pin 7)
9 No Connection