MoTeC PLM - Manual (Page 4)

4 Meter Operation
Meter Operation
PLM Connections
Connectors
The PLM has a male and a female D-9 pin connector.
See Appendix D – PLM Connector Details for a description of the PLM pinout.
Male Connector
The loom supplied with the PLM is fitted to the male PLM connector, for
connection to the sensor and to a power supply. The Power supply must
provide enough current (up to 5 Amps at start up) for both the meter and the
sensor heater element. The vehicle battery is typically the most convenient
source of power.
It is not recommended that the power and sensor loom be extended by using a
standard serial cable. These are unable to supply the current required by the
sensor heater. If an extension is made, the wire must be at least 20 gauge.
Female Connector
The female PLM connector has pins for serial connection to a PC, CAN data
bus, 2 digital inputs and the analog voltage output.
The pinout is assigned to allow direct connection to a PC with a standard
(straight through) 9 pin serial cable. Note that the PC must have a serial
communications port (normally marked COM1). A custom cable is required to
use the other features on this connector.
Analog Output
The analog output provides a voltage proportional to Lambda. The scaling of the
analog output can be changed by using the PLM Setup software to configure
the device (see Setup | Analog Output in the PLM Setup Software section).