Rockwell Automation 1771-DMC_DMC1_DMC4_DXPS Control Coprocessor User Manual - Manual (Page 13)

Chapter 1
Introducing the Control Coprocessor
1-3
Table 1.B describes the hardware elements for the main module.
Table 1.B
MainĆModule Hardware Elements
Hardware
Element
Description
RESET Switch
Use the reset switch to reinitialize the control coprocessor
When the serial expander module is installed, use the keyswitch to reinitialize the coprocessor
LEDs Four status indicators provide information on the CPU, COMM0 port, COMM1 port, and battery
COMM0 Port
This is a 9Ćpin, optically isolated, serial communication port that supports communication
defined by EIA RSĆ232C standards
Use this port to connect:
• personal computers
• terminals
• other peripheral devices
COMM1 Port
This is a 25Ćpin, optically isolated, serial communication port that supports communication
defined by EIA RSĆ232C, Ć423, and Ć485 standards
You can also use this port with most RSĆ422A equipment as long as:
• termination resistors are not used
• the distance and transmission rate are reduced to 200 ft at 19.2 kbps
Use this communication port to connect peripheral devices such as:
• personal computers
• terminals
• barĆcode readers
• weigh scales
• printers
Battery
This battery provides backup power for control coprocessor memory during power failure or
normal down time
Use the 3.0 volt lithium battery (cat. no. 1770ĆXYC) that is provided with your coprocessor
Ethernet Port
(1771ĆDMC1 and
1771ĆDMC4 only)
The 1771ĆDMC1 and 1771ĆDMC4 versions of the control coprocessor include an Ethernet
communication port that connects to thickĆwire, thinĆwire, or twistedĆpair networks via a standard
15Ćpin transceiver connection
These modules use TCP/IP protocol and have resident FTP and TELNET utilities
You can program client/server applications for an Ethernet port using the TCP/IP socket library;
an Internet socket library is supplied with the PCBridge software
A downloadable driver is also availableĊas a part of the PCBridge softwareĊthat provides
INTERCHANGE t server functionality; when the coprocessor is attached to a standard PLCĆ5
processor, this provides Ethernet connectivity
Optional RAM
You can install additional RAM in the main module to expand user memory
The following single inline memory modules (SIMMs) are available:
Memory Size Catalog Number
256 Kbytes 1771ĆDRS
1 Mbyte 1771ĆDRS1
4 Mbytes 1771ĆDRS4
Hardware Overview
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