Black Box MED100A specifications Package Contents, Terminal Block, Front Panel, DIP Switch SW1

MED100A-0908-2/5 p/n 6132r3

Package Contents

Terminal Block

•MED100A Industrial Serial To Multi-mode Fiber Optic Converter

•Datasheet

•Fiber Optic Dust Cover (installed)

Front Panel

1	Fiber Connectors	Multi-mode, ST Connectors
2	PWR LED	ON When Power Applied
3	TD LED	On When Serial Data Transmitted
4	RD LED	On When Serial Data Received
5	DIP Switch	8 Position,
6	Terminal Blocks	Serial Data and Power

DIP Switch (SW1)

Pos	ON	OFF
1	RS-422/485 Baud Rate Selection
2	RS-422/485 Baud Rate Selection
3	RS-422/485 Baud Rate Selection
4	RS-422/485 Baud Rate Selection
5	RS-422/485 Baud Rate Selection
6	FO Multi-drop Ring	FO Point-to-Point
7	RS-422/485	Mode Selection
8	RS-422/485 Mode Selection

Terminal	Signal
A	RS-232 RD (OUTPUT)
B	GND
C	GND
D	RS-232 TD (INPUT)
E	NOT CONNECTED
F	+10 TO 30 VDC
G	RS-422/485 TDA(-) / DATA A(-)
H	RS-422/485 TDB(+) / DATA B (+)
J	+10 TO 30 VDC
K	RS-422/485 RDA(-) / DATA A (-)
L	RS-422/485 RDB(+) / DATA B (+)

DIN Rail Mounting

1.Angle the converter DIN clip over the top of the DIN rail.

2.Move the converter so that it is parallel with the DIN Rail and snap the DIN clip into place..

RS-422/485 Baud Rate /

Timeout

Baud	1	2	3	4	5	R9	TIME OUT
1200	ON	OFF	OFF	OFF	OFF	820 kΩ	8.20 ms
2400	ON	OFF	OFF	OFF	OFF	430 kΩ	4.30 ms
4800	OFF	OFF	OFF	OFF	ON	None	2.20 ms
9600	OFF	OFF	OFF	ON	OFF	None	1.30 ms
19.2K	OFF	OFF	ON	OFF	OFF	None	0.56 ms
38.4K	OFF	ON	OFF	OFF	OFF	None	0.27 ms
57.6K	ON	OFF	OFF	OFF	OFF	None	0.22 ms
76.8K	ON	OFF	ON	ON	OFF	None	0.14 ms
115.2 K	ON	ON	ON	OFF	OFF	None	0.10 ms
153.6K	ON	OFF	OFF	OFF	OFF	6.2 kΩ	0.06 ms
230.4K	ON	OFF	OFF	OFF	OFF	4.3 kΩ	0.04 ms
460.8K	OF	OFF	OFF	OFF	OFF	2.2 kΩ	0.02 ms

The Dip-Switch on the MED100A defines the mode of operation when being used for RS-422 or RS-485. Positions 1 through 5 determine the timeout of the RS-485 driver. Because the driver is controlled by hardware, a specific time must be set to tell the hardware how long to wait for data on the fiber side before turning off the RS-422/485 driver. If this time is set too short, the driver could be disabled before transmission is complete, resulting in data corruption. If the time is set too long, the device may respond before the RS-422/485 driver in the MED100A is disabled, corrupting this response. Set the timeout for approximately one character time or longer. The character times for several different baud rates are selectable on switch positions 1 through 5. If you need a different timeout than what is provided, R10 can be removed and replaced with a different value R9. This table shows different timeout values for the switch positions as well as R9 replacement values.

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