Guralp Systems CMG-DCM build <10,000 - Manual (Page 15)

Operator's Guide
2 First Steps
The CMG-EAM can be configured and monitored either over an
Ethernet network or via a serial (RS232) line. Network access is
preferred. The configuration interface as accessible using a web
browser or, in character mode, using ssh or over a serial connection
from a terminal emulator.
All models are fitted with at least one network port which can be
automatically configured using DHCP. If DHCP is not available, serial
access is required in order to set up the network parameters.
The CMG-EAM has four serial ports, any of which can be configured
for this purpose, although the 'D' connector located under the lid is a
dedicated console port.
The CMG-DCM has three serial ports: the port labelled “DATA OUT” is
normally used for console access and a combined serial and power
cable is provided for this purpose.
The hardware fitted to CMG-NAMs varies but one serial port will
usually be designated as the console port.
2.1 Connecting to the Serial Port
The CMG-EAM's console port is a 9-pin 'D' connector (with DCE
wiring) located under its lid. It can be connected via a serial (RS232)
modem cable (i.e. pins 2 (RxD), 3 (TxD) and 5 (ground) connected
straight through) to a serial terminal or to a PC running either Scream!
or terminal emulation software. The default settings for this port are as
follows:
●
38,400 baud;
●
8 data bits, no parity, 1 stop bit (8N1); and
●
No flow control.
These settings are not configurable, preventing accidental lock-out due
to inadvertent changing of the port settings.
The CMG-DCM does not have a dedicated console port: the “DATA
OUT” port is normally used for console access. A combined power
and serial cable is provided with both CMG-EAMs and CMG-DCMs for
connection to this port.
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