Pin Assignments - Optical Systems Design OSD8816B Series Operator's Manual

1.5

PIN ASSIGNMENTS

Pin assignments for the "Data Input/Output" 8 way terminal block connector (Figure 2) is shown in
Table 3 below.
PIN FUNCTION
1
Data Input +
2
3
RS232 Data Input
4
Data Output + /
NOTES:
*2
10-bit video resolution and reverse data only when pin 8 is left Normally Open (N/O) and
SW3 (T3) left OFF (UP) (see Table 4 and Figure 3)
*3
9-bit video resolution and full duplex (or forward) data, only when pin 8 is connected to
ground pin.
RS422 / 4W RS485
Pin Connection
1 Rx +
2 Rx –
4 Tx +
5 Tx –
7 Ground
RS485 2-Wire half duplex is used to connect several devices to the same bus when only one unit
transmits data at a time. All units are normally in high impedance receive mode waiting for data. When
transmission of data is requested, the device waits for a protocol specific turn-around time delay before
transmitting after which it returns to receive mode.
RS485 4-Wire full duplex is used for master/slave arrangement. Devices are polled and respond faster
with no turn-around time delay required between request/response. The receiver is always enabled
allowing the devices to receive data even while responding to a request.
Note: If a link doesn't seem to be working correctly, try swapping the polarity of the data lines on both
ends. Some devices are marked opposite the RS485 standard.
PAGE 8
OPTICAL SYSTEMS DESIGN
TABLE 3: PIN ASSIGNMENT
Data Input –
*4
2W RS485
Pin Connection
4 I/O +
5 I/O –
7 Ground
OSD8816B OPERATOR MANUAL
PIN FUNCTION
Data Output − /
5
RS232 Data Output /
6
7
*2
Mode: N/O – 10-bit video, reverse data only
8
*3
N/C – 9-bit video, duplex data
*4
Optional Relay Output (8816BR only)
OSD8816BT
Pin
2
7
OSD8816BR
Pin
4
6
*4
*4
Data Ground
Connection
Contact Input
Ground
Connection
Normally open (NO)
Common (COM)
DOC ID: 10115503