ECO Meter Pinouts
ECO sensors use am MCBH-6-MP bulkhead connector. Input power of 7–15 VDC is applied to pin 4. The power supply current returns through the common ground pin. The input power signal has a bi-directional filter, which prevents external power supply noise from entering the ECO. It also prevents internally generated noise from coupling out onto the external power supply.
WARNING!
Single channel ECOs: If you are going to build or use a non-WET Labs-built cable, do NOT use the wire from pin 3 or the meter will be damaged.
Pin |
Function |
Diagram |
1 |
Ground |
 |
2 |
RS-232 RX |
|
3 |
Reserved |
|
4 |
V in |
|
5 |
RS-232 TX |
|
6 |
Analog out |
ECO FLNTU bulkhead connector diagram
Pin |
Function |
Diagram |
1 |
Ground |
|
2 |
RS-232 RX |
|
3 |
NTU analog out |
|
4 |
V in |
|
5 |
RS-232 TX |
|
6 |
FL analog out |
ECOs with internal batteries have a second bulkhead connector that comes with a jumper plug (marked with blue rubber coating) to supply power to the unit.
ECO with internal batteries bulkhead connector diagram
Socket |
Function |
Diagram |
1 |
V in |
 |
2 |
N/C |
|
3 |
Battery out |
