OEM-IMU-STIM300 Direct Connection

The following table shows the connections required when connecting the OEM-IMU-STIM300 to an OEM7 receiver using a RS‑422 link.

Pins not shown on the following tables are not connected.

OEM7 Receiver Card to OEM-IMU-STIM300 Pin Connections

STIM300

RS-422 Line Driver

Receiver

 

Pin

Pin Name

Output

Input

Pin Name

Description

1

STIM TxD-

RS422 B-

–

–

Part of RS-422 transmit pair from STIM300

2

STIM RxD-

RS422 A-

–

–

Part of RS-422 receive pair from STIM300

4

STIM TOV

–

–

EVENT_IN2

OEM719: 7
OEM729: 7
OEM7600: 29
OEM7700: 29
OEM7720: 29

Interface Circuit Required
The STIM TOV output uses 5V logic, but the OEM7 EVENT_IN lines are not 5V tolerant. A circuit to convert from 5V logic to 3.3V levels is required.

8

5V Pwr

–

–

–

5 VDC power supply

9

STIM TxD+

RS422 B+

–

–

Part of RS-422 transmit pair from STIM300

10

STIM RxD+

RS422 A+

–

–

Part of RS-422 receive pair from STIM300

12

GND

–

–

–

Any receiver ground pin

13

GND

–

–

–

Any receiver ground pin

15

GND

–

–

–

Any receiver ground pin

–

–

–

LVCMOS A IN

COMx_TXD

Any receiver COM port transmit and receive pair

–

–

–

LVCMOS B IN

COMx_RXD

–

–

–

GND

 

Any receiver ground pin
OEM729 COM1 or PwrPak7 to OEM-IMU-STIM300 Pin Connections

STIM300

Receiver

 

Pin

Pin Name

Pin

Pin Name

Description

1

STIM TxD-

OEM729 COM1: 15

PwrPak7 COM1: 4
COM2: 12

COMx_RXD-

Part of RS-422 transmit pair from STIM300

2

STIM RxD-

OEM729 COM1: 17

PwrPak7 COM1: 1
COM2: 19

COMx_TXD-

Part of RS-422 receive pair from STIM300

4

STIM TOV

OEM729: 7

PwrPak7: 23

EVENT_IN2

Interface Circuit Required
The STIM TOV output uses 5V logic, but the OEM729 EVENT_IN lines are not 5V tolerant. A circuit to convert from 5V logic to 3.3V levels is required on the OEM729.

The PwrPak7 input strobes are 5V tolerant and can be connected directly to the STIM TOV output.

8

5V Pwr

–

–

5 VDC power supply

9

STIM TxD+

OEM729 COM1: 18

PwrPak7 COM1: 3
COM2: 20

COMx_RXD+

Part of RS-422 transmit pair from STIM300

10

STIM RxD+

OEM729 COM1: 20

PwrPak7 COM1: 2
COM2: 10

COMx_TXD+

Part of RS-422 receive pair from STIM300

12

GND

 

 

Any receiver ground pin

13

GND

 

 

Any receiver ground pin

15

GND

 

 

Any receiver ground pin

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.

For more information about connecting using a SPI port, refer to Connect an OEM-IMU-STIM300 Directly to an OEM7 Receiver.