Optical Systems OSD840 SERIES, Руководство оператора

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OPTICAL SYSTEMS DESIGN
DOC ID: 10104804.doc
OSD840 OPERATOR MANUAL
PAGE 8
1.6 PIN ASSIGNMENTS
Pin assignments for the “Audio/Data Input/Output” DB26 high-density connector (Figure 2) is shown
in Table 3 below.
TABLE 3: PIN ASSIGNMENT
FUNCTION PIN FUNCTION PIN
Data ground 1,6 Relay input 22
Audio ground 15,18 Relay output n.o. 5
Data1 input + 10 Relay output n.c. 14
Data1 input - 19 Relay output common 23
Data1 2 Audio1 input + 24
Data1 output - 11 Audio1 input - 7
Data2 input + 20 Audio1 16
Data2 input - 3 Audio1 output - 25
Data2 12 Audio2 input + 8
Data2 output - 21 Audio2 input - 17
RS232 input channel 3 4 Audio2 26
RS232 output channel 3 13 Audio2 output - 9
NOTES:
•
2-wire RS485 is available on pins 2 and 11
•
Data channel 1 RS232 output is available on pin 2 when link LK6 has pins 1 and 2 connected
•
Data channel 2 RS232 output is available on pin 12 when link LK4 has pins 1 and 2 connected
FIGURE 2: DB26 FEMALE HIGH DENSITY CONNECTOR
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.
1
9
10
19
18
26