Optical Systems OSD1250, Руководство оператора

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OPTICAL SYSTEMS DESIGN
OSD1250 OPERATOR MANUAL
PAGE 10 DOC ID: 10106110
2.2 SWITCH SETTINGS
In the context of the following switch settings for the module version the ON position is UP and the OFF position is down.
The term AS refers to Anti-Streaming.
The BIAS switch SW2 is dual function and only generates BIAS in RS485 modes.
MODE SW1 SW2 SW3 SW4
RS485 BIAS
MASTER ON
SLAVE OFF
RS232 WITH AS OFF OFF OFF
RS422 WITH AS
OFF OFF OFF
RS232/422 NO AS
ON ON OFF
RS485 2 WIRE
AS REQUIRED ON ON
RS485 4 WIRE
AS REQUIRED OFF ON
TABLE 2: SWITCH SETTINGS
2.3 POWER IN CONNECTION
Units are powered by +9V to 30V
DC
@ 6VA.
FIGURE 3: POWER IN CONNECTION
WARNING - Ensure that you are using the correct voltage!
The unit employs an internal resetable solid state fuse to protect both it and the power source in the event of a fault in the
modem’s internal power supply.
The OSD1250 card version requires DC power which is connected via a DB9 connector and supplied by the OSD370N or
OSD350N chassis. The card should be fixed into the chassis using the captivated screws. The cards can be plugged in or out of
the chassis with power on or off.
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2
3
4
5
6
7
8
9
10
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13
A B C
D E
Negative Input Positive Input