APPENDIX A IMU Technical Specifications
OEM7 SPAN Installation and Operation User Manual v14
237
A.16.4 OEM-IMU-STIM300 Direct Connection
The following table shows the connections required when connecting the OEM-STIM300 to an OEM7 receiver
using a RS-422 link.
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
3
NC
–
–
–
Do not connect
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.
5
NC
–
–
–
Do not connect
6
NC
–
–
–
Do not connect
7
NC
–
–
–
Do not connect
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
11
NC
–
–
–
Do not connect
12
GND
–
–
–
Any receiver ground pin
13
GND
–
–
–
Any receiver ground pin
14
NC
–
–
–
Do not connect
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
Table 129: OEM7 Receiver Card to STIM300 Pin Connections
