Casella CEL Sensus data logger unit - Manual (Page 27)

All of these parameters may be changed using commands built into the
logger software interface.
6.4 RS 485 Command Alternate
The Sensus Logger also has an RS 485
interface accessible from the connector array
(Figure 19). The signals are available from a
2-way spring terminal block.
This interface can be used as an
alternate to the primary command interface
(RS232) where longer distances exist.
The pin connections for the RS 485
alternate command interface connector are as
follows.
Pin Assignment
1 A (-)
2 B (+)
The Sensus Logger is shipped from Casella CEL with this instrument
interface set to the following parameters.
Default parameters - RS485 alternate command interface
Baud rate 9600
Data bits 8
Parity None
Stop bits 1
Handshake None
All of these parameters may be changed using commands built into the
logger software interface.
6.5 Modems
The Sensus Logger is pre-configured with a generic set of command/
response strings suitable for most Hayes-compatible modems. If the modem
used differs from this standard, these strings will need to be altered to match
the new configuration.
In addition, all command/response time-out values are also
configurable for those instances where the default values are insufficient for
the equipment used.
Communications
01081
Pin 1
Pin 2
Figure 19: RS 485 interface
SENSUS Digital Data Logger -
Users Handbook
Page 27 of 44