DM-634C Oxygen Sensor Assembly
DM-634C O2 Sensor Instruction Manual Rev. .066
Page 11 of 25
FAULT
ALARM1
AL
A
R
M2
Latch
Energize
Latch
Ascending
Energize
A
sc
en
di
ng
E
ne
rg
ize
CPU Board - Top View
Alarm Programming Jumpers
CPU Board
Figure 9
Control Circuit
f)
If applicable, set the RS-485 ID number via the two rotary dip switches located on the pre-amp board
(see Figure 10). There are 256 different ID numbers available which are based on the hexadecimal
numbering system. If RS-485 communications are used, each sensor must have its own unique ID
number. Use a jeweler’s screwdriver to set the rotary dip switches according to the table listed on the
following page. If RS-485 communications are not used, leave the dip switches in the default position
which is zero/zero (0)-(0)
Preamp Board
9
1
2
3
45
6
7
8
0
9
1
2
3
45
6
7
8
0
Preamp Board - Side View
RS-485 ID Set Dip Switches
SW1
SW2
Figure 10
Control Circuit
