Connect an OEM-IMU-STIM300 Directly to an OEM7 Receiver

The OEM-IMU-STIM300 can connect directly to an OEM7 receiver using a serial port connection.

The interface to the OEM-IMU-STIM300 must provide:

• a Micro-D 15 pin male connector

  This connector mates with the connector on the OEM-IMU-STIM300. See Figure: OEM-IMU-STIM300 Pin Out for the IMU connector pin out.

• a RS-422 serial port connection to the OEM7 receiver

  For most OEM7 receiver cards the connection must include a RS-422 line driver.

  If using COM1 on an OEM729, a RS-422 line driver is not required. However, the COM1 protocol must be set to RS-422 using the SERIALPROTOCOL command.

  Use COM1 or COM2 on the PwrPak7 to connect to the OEM-IMU-STIM300. These ports can be set to RS-422 protocol using the SERIALPROTOCOL command.

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

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.