IMU-FSAS Cable with Wheel Sensor

The NovAtel part number for the IMU-FSAS cable with Wheel Sensor is 01018388 (see Figure: IMU-FSAS Interface Cable with Wheel Sensor). This cable:

  • provides power to the IMU from an external power source

  • enables input and output between the receiver and the IMU

  • enables input from an optional Wheel Sensor

See also DMI Connected to an IMU.

IMU-FSAS Interface Cable with Wheel Sensor

IMU-FSAS Cable with Wheel Sensor Pinout

MIL‑C‑38999 III
Connector Pin

Function

Power
4 mm plugs

J1 Female DB9

P4 Male DB9

Comments

1

Vin(-)

Color: black
Label: Vin (-)

    

Power ground

22

Vin(-)

    

2

ODO_AN

    

7

Wheel sensor input A(-),
opto-coupler: +2 to +6 V (RS-422 compatible)

4

ODO_A

    

6

Wheel sensor input A(+),
opto-coupler: +2 to +6 V (RS-422 compatible)

3

Vin(+)

Color: red
Label: Vin(+)

    

+10 to +34 VDC

21

Vin(+)

    

5

Not used

6

Not used

7

DAS(+)

  

1

  

Shielded data acquisition signal (LVCMOS to VARF)

9

DAS GN (-)

  

5

  

Shielded ground reference for data acquisition and control signals

8

Reserved

10

Reserved

11

OEM_CTS/
Rx-

  

8

  

Twisted pair; serial data output signal / RS-422(-)

12

OEM_Rx/
Rx+

  

2

  

Twisted pair; serial data output signal / RS-422(+)

13

Reserved

14

DGND

 

5

  

Digital ground

15

DGND

 

5

  

Digital ground

16

ODO_B

    

3

Wheel sensor input B(+),
opto-coupler: +2 to +6 V (RS-422 compatible)

17

ODO_BN

    

1

Wheel sensor input B(-),
opto-coupler: +2 to +6 V (RS-422 compatible)

18

Reserved

19

OEM_Tx/
Tx+

  

3

  

Twisted pair; serial data in / RS-422(+)

20

OEM_RTS/
Tx

  

7

  

Twisted pair; serial data in / RS-422(-)

Custom Cable Recommendations

The tables below provide recommendations for creating custom cables to replace the IMU-FSAS cable with Wheel Sensor (01018388).

Connectors

Connector

Description

J1

DB-9, female

J2

MIL-DTL-38999 III, plug

P4

DB-9, male
Maximum Cable Length

IMU

RS-422

IMU-FSAS

< 1.5 metres