Chapter 2 SPAN Installation
OEM7 SPAN Installation and Operation User Manual v14
49
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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 the
OEM7 Installation and Operation User Manual
.
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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
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
4
NC
–
Do not connect
5
NC
–
Do not connect
6
NC
–
Do not connect
7
NC
–
Do not connect
8
NC
–
Do not connect
9
NC
–
Do not connect
10
NC
–
Do not connect
Table 9: OEM7 Receiver Card to HG4930 Pin Connections