Chapter 2 SPAN Installation
OEM7 SPAN Installation and Operation User Manual v14
47
STIM300
RS-422 Line Driver
Receiver
Pin
Pin Name
Output
Input
Pin Name
Description
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
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
3
NC
–
–
Do not connect
4
STIM TOV
OEM729: 7
PwrPak7: 23
EVENT_
IN2
Interface Circuit Required
The STIM TOV output uses 5V logic, but
the OEM7 EVENT_IN lines are not 5V tol-
erant. 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
Table 7: OEM729 COM1 or PwrPak7 to STIM300 Pin Connections