PROTEUS
OMNTEC
Mfg., Inc., 2420 Pond Road, Ronkonkoma, NY 11779
Phone (631) 981-2001 Fax (631) 981-2007 www.OMNTEC.com
File Name: DE00014 DE00015 DE00020-10 rev2045.docx Page 4 of 71 Rev Date: 10-15-2021
Serial Interface Manual
OEL8000III Series Models K/X
1.0 INTRODUCTION
The OEL8000III-K/X Tank Monitoring System has two modes for remote communication, used to connect the
system to a controlling computer.
1. Serial RS-232 interface.
3. Ethernet interface.
2.0 HARDWARE CONNECTIONS
The RS-232 interface is accessed via a 9-pin D-connector located on the left (K) or bottom-left (X) of the console.
2.1 RS-232
The RS-232 D-connector is a panel mount, 9-pin female type, wired in a Data Terminal Equipment (DTE)
configuration.
RS-232 signals are wired to the female D-connector as follows:
Communications rate is selectable:
Baud: 1200, 2400, 4800,
9600
, 38400, or 57600 baud.
Data Bits: 7, or
8
data bits.
Parity: Odd, Even, or
None
parity.
Stop bits:
1
, or 2.
*Note: Defaults italicized and bolded.
The RS-232 specification is designed for operation up to 75 feet. Direct connect cables greater than 50 feet are not
warranted for proper operation.
2.2 EXTERNAL MODEM
The optional external modem operates at up to 9600 Baud. The modem module plugs into the RS232 port.
Pin #
Function
Pin 2
Transmit Data
Pin 3
Receive Data
Pin 5
Signal Ground
