Measurement Technology NW
LCI-90 Operator Manual
Page 20
Isolated Outputs
(associated Module must be installed)
TB6
Field Device/Data Logger
MOD3 - S+
CHANNEL 1
MOD3 - S–
CHANNEL 1 SIGNAL –
MOD4 - S+
CHANNEL 2
MOD4 - S–
CHANNEL 2 SIGNAL –
Note: Associated output module must be installed in correct position.
Figure 4.17 – Isolated Analog Output Hookup – 2 Channels
4.1.7 Serial Communications
The LCI-90 provides both RS-232 and RS-485 serial communication options with a
maximum of two ports. The base model has no serial ports. A RS-232 network port
can be added for data logging to a single remote device in close proximity. For long
cable runs or multi-drop applications, this option can be replaced by an electrically-
isolated RS-485 port. An auxiliary RS-232 port is also available for serial output to
user-supplied logging or display devices.
The RS-485 serial termination is set using the DIP switch settings in Appendix B.
Below are the wiring diagrams for all serial communications options.
RS-232 Connection – Auxiliary Port
TB8
Remote Device
AUX – TX
Receive
AUX – RX
Transmit
AUX – GND
DC Common
Figure 4.18 – RS-232 Auxiliary Communcation Hookup
RS-232 Connection – Network Port
TB8
Remote Device
TX
Receive
RX
Transmit
GND
DC Common
Figure 4.19 – RS-232 Network Communcation Hookup