Connecting Devices to the RM3011

To ensure a clean, stable reading, keep field wiring as short as possible and use shielded twisted pair wire such as Alpha 2463C.

The RM3011 is connected to the oil sensor switch, annunciator, and a DC power source with the circular 9-pin cable assembly, which is shipped with the unit.

Circular 9-Pin Cable Assembly

Circular 9-Pin Cable Assembly

The cable assembly is labeled with wiring descriptions to help with the installation of the oil sensor switch, annunciator, and DC power.

Circular 9-Pin Cable Assembly Wiring

Front Panel Pin

Wire Color

Description

3

Orange

-Alarm/GND

4

Blue

+Alarm

5

Brown

Gnd (ground)

1

White

TxD

2

Green

RxD

8

Black

-Vin (voltage in)

9

Red

+Vin (voltage in)

Complete the following steps to connect the devices to the RM3011:

  1. Splice the oil line into the compression tee. Secure the line by tightening the end bolts.

    Compression Tee

    Compression Tee

  2. Wrap Teflon tape around the oil sensor threads.

  3. Attach the oil sensor switch to the compression tee.

    Oil Pressure Sensor Switch

    Oil Pressure Sensor Switch

  4. If needed, connect spade lugs to the alarm wires (blue/orange) for connection to the oil sensor switch terminals.

  5. Connect alarm wires to the oil sensor switch terminals.

  6. If applicable, connect the receive/transmit/ground wires (white/green/brown) to annunciator.

  7. For Altronic annunciators, connect the receive/transmit/ground wires to the screw terminals of the DB-9 adapter, using the following connections:

    1. Connect green wire to wire terminal marked RXD (2).

    2. Connect white wire to the screw terminal marked TXD (3).

    3. Connect ground (brown) wire to the screw terminal marked GND (5).

    Annunciator DB-9 Adaptor

    Annunciator DB-9 Adapter

  8. Connect voltage wires (black = negative; red = positive) to DC source on compressor (requires 12-36Vdc input).

    Connect the voltage wires from the 9-pin cable assembly to the non-switched side of the power strip of the compressor or to a continuous power source. This will ensure that power to the RM3011 is not interrupted if the compressor shuts down.

  9. Line up notch on the circular 9-pin connector to the 9-pin connector on the RM3011. Secure connector by tightening coupling ring until it clicks in place.

    RM3011 9-Pin Connector and USB Port

    RM3011 9-Pin Connector and USB Port