User's Guide _______________________________________________________________________
10 ___________________________________________________________________ M210636EN-B
Connect the power to DXL421. Make sure that polarity of power
cable is correct. The over-voltage, short-circuit and reverse connection
protection are included in DXL421.
When the power is switched ON, the DXL421 sends a following
response to serial line:
DXL421 V1.02 2004-07-28
MODE: ORIG 1200b DPSK LEVEL -6.0dB
Here V1.02 2004-07-28 is the firmware version and the second row
corresponds to the mode settings according to the DIL switch position.
Mode Settings
The operation mode is set by a four positions DIL switch. The 2/4-
wire mode is set by jumpers X5 - X7. The DIL switch is located on
top of the housing and jumpers are located inside of the housing. A
side-label shows the settings of the modem.
The factory default settings are 2-wire, originate, 1200 baud, -6db.
Table 1
DIL Switch Positions
Number
ON
OFF
1.
Originate
Answer
2.
1200 baud
300 baud
3.
Carrier Level 0 db
Carrier Level -6 db
4.
Speed buffer 9600 baud
Table 2
Jumpers X5, X6 and X7
Jumper
2-wire
4-wire
X5
1-3 and 2-4
3-5 and 4-6
X6
1-3 and 2-4
3-5 and 4-6
X7
1-3 and 2-4
3-5 and 4-6
