Connect an OEM-IMU-HG4930 Directly to an OEM7 Receiver

The OEM-IMU-HG4930 can connect directly to an OEM7 receiver using a serial port connection.

The OEM-IMU-HG4930 serial port uses 5 V signal levels.

OEM7 receiver card COM ports are not 5 V tolerant. A circuit to convert from 5V logic to 3.3V levels is required.

SPAN supports the Honeywell HG4930-AN01 and HG4930-AN04 models only. Other models of the HG4930 are not supported.

The interface to the OEM-IMU-HG4930 must provide:

  • a 2 x 7 header

    This connector mates with the connector on the OEM-IMU-HG4930. The recommended connectors are:

    OEM-IMU-HG4930 Mating Connector

    OEM-IMU-HG4930 Connector

    Mating Connector

    2 x 7 header

    SAMTEC CLT-107-01-S-D

    DigiKey CLT-107-01-S-D-ND

  • an interface circuit between the OEM-IMU-HG4930 and the OEM7 receiver

    For most OEM7 receiver card COM ports, a circuit is required to convert from the 5 V levels used by the OEM-IMU-HG4930 to the 3.3 V levels used by the receiver.

    For COM1 on the OEM729, a line driver is required for the COM port connection to convert from the 5 V levels on the OEM-IMU-HG4930 to RS-232 or RS-422. If using a RS-422 line driver, change the protocol of the receiver COM port to RS-422 using the SETIMUPORTPROTOCOL command.

    Refer to the following tables for the connections required between the IMU and receiver. For information about the receiver connector, see OEM719 Interface Connector, OEM729 Interface Connectors, OEM7600 Interface Connector, OEM7700 Interface Connector, OEM7720 Interface Connector or PwrPak7 Connectors.

  • a 5.0 VDC (±0.5 VDC) regulated power supply

    Refer to the following tables for the location of the power supply connections.

Direct Connect an OEM7 Receiver to the OEM-IMU-HG4930

Pins not shown on the following table are not connected.

OEM7 Receiver Card to OEM-IMU-HG4930 Pin Connections

HG4930

Receiver

 

Pin

Pin Name

Pin Name

Description

1

GND

–

Connect to power supply Ground and any receiver ground pin. Follow grounding best practices.

2

+5V

–

Connect to the 5 VDC power supply

3

TMI

PPS

OEM719: Pin 19

OEM729: Pin 4

OEM7600: Pin 24

OEM7700: Pin 24

OEM7720: Pin 24

11

TTL_TX

COMx_RXD

Any COM port transmit and receive pair.

For most COM ports, a circuit to convert from 3.3V to 5V levels is required. The exception is COM1 on the OEM729. For COM1 on the OEM729, see Direct Connect COM1 on the OEM729 to the OEM-IMU-HG4930.

12

TTL_RX

COMx_TXD

Enter the following commands on the OEM7 receiver to configure the receiver to use the direct connection to the OEM-IMU-HG4930 described in the previous table.

  1. CONNECTIMU COMx HG4930_ANxx

    HG4930_ANxx can be HG4930_AN01, HG4930_AN04, or HG4930_AN04_400HZ depending on IMU variant and receiver model.

  2. PPSCONTROL ENABLE POSITIVE

Direct Connect COM1 on the OEM729 to the OEM-IMU-HG4930

Pins not shown on the following table are not connected.

COM1 on the OEM729 to OEM-IMU-HG4930 Pin Connections

HG4930

Receiver

 

Pin

Pin Name

Pin Name

Description

1

GND

–

Connect to power supply Ground and any receiver ground pin. Follow grounding best practices.

2

+5V

–

Connect to the 5 VDC power supply

3

TMI

PPS

OEM729: Pin 4

9

SER_DATA_OUT_H

COM1_
RXD+

OEM729: Pin 18

Serial Data High Output (RS-485)

10

SER_DATA_OUT_L

COM1_RXD-

OEM729: Pin 15

Serial Data Low Output (RS-485)

Enter the following commands on the OEM7 receiver to configure the receiver to use the direct connection to the OEM-IMU-HG4930 described in the previous table.

  1. CONNECTIMU COM1 HG4930_ANxx

    HG4930_ANxx can be HG4930_AN01, HG4930_AN04, or HG4930_AN04_400HZ depending on IMU variant and receiver model.

  2. PPSCONTROL ENABLE POSITIVE

  3. SETIMUPORTPROTOCOL RS422

Direct Connect a PwrPak7 to the OEM-IMU-HG4930

Pins not shown on the following table are not connected.

PwrPak7 to OEM-IMU-HG4930 Pin Connections

HG4930

PwrPak7

 

Pin

Pin Name

DSUB HD26 Pin

All I/O SPAN Cable
COM2 /IMU DB9 Pin

Pin Name

Description

1

DGND

17

5

COM2_GND

Connect to power supply Ground and any receiver ground pin. Follow grounding best practices.

2

+5VDC

–

–

–

Connect to the 5 VDC power supply

3

TMI

16

1

EVENT_OUT1

PPS Synchronization signal

9

SER_DATA_OUT_H

20

2

COM2_
422RX+

Serial Data High Output (RS-485)

10

SER_DATA_OUT_L

12

8

COM2_422RX-

Serial Data Low Output (RS-485)

For the location of the receiver ground pins and transmit and receive pairs, refer to OEM719 Interface Connector, OEM729 Interface Connectors, OEM7600 Interface Connector, OEM7700 Interface Connector, OEM7720 Interface Connector or PwrPak7 Connectors.

Enter the following commands on the PwrPak7 to configure the receiver to use the direct connection to the OEM-IMU-HG4930 described in the previous table.

  1. CONNECTIMU COM2 HG4930_ANxx

    HG4930_ANxx can be HG4930_AN01, HG4930_AN04, or HG4930_AN04_400HZ depending on IMU variant and receiver model.

  2. SETIMUPORTPROTOCOL RS422

  3. EVENTOUTCONTROL MARK1 ENABLE POSITIVE 100000000 900000000