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Page 37
Setting the RS-485 Address
The Terranova® 752A outputs the RS-485 address during the Self-test as a decimal value from 0
to 255. However, the decimal address is input into the control unit as an 8-bit binary value from
00000000 to 1111111 via DIP Switch S2. The binary bits are determined via the eight individual
ON (i.e. 1) / OFF (i.e. 0) switches on DIP Switch S2. DIP Switch S2-1 is the least significant bit; DIP
Switch S2-8 is the most significant bit. As shown in
, default RS-485 address is 00000101
in binary notation or 5 in decimal notation.
Figure 12.
DIP Switch S2 diagram
To change the Terranova® 752A RS-485 address:
1. Turn unit OFF via the
POWER
switch
2. Remove power cord and ion pump cable(s)
3. Remove the six #6-32 screws along the edge of the top cover
4. Carefully lift the top cover and disconnect the fan plug
5. Remove top cover
6. Locate DIP Switch S2 (see
7. Set switches to desired address
8. Connect the fan plug and replace top cover
When ready for use, user should re-connect the ion pump cable(s) and power cord. If address
change is successful, the corresponding address will appear on the CHANNEL 2 CURRENT display
during the self-test. Thereafter, the control unit may resume normal operation.
User should wait at least 15 seconds after turning OFF the
Terranova® 752A before removing the power cord
WARNING!
