11
Number of Digits to Decode:
The 3185E is factory set to decode a 4-digit 'ON' code sequence and a 4-digit 'OFF' code
sequence. The first three digits of the code sequence are the same for both 'ON' and 'OFF'.
The fourth digit for the 'ON' code sequence is factory set to '*', and the fourth digit for the 'OFF'
code sequence is factory set to '#'. The number of digits to decode is determined by jumpers
'J6'
and
'J5'
. Consult FIGURE 3 page 7 for the location of
'J6'
and
'J5'
.
The programming of jumpers for the number of digits to decode is shown below:
NUMBER OF
DIGITS
JUMPER
J6
J5
1
X
X
2
X
O
3
O
X
4
O
O
TABLE 3
X = JUMPER INSTALLED
O = JUMPER REMOVED
Fourth Digit ON/OFF:
The fourth digit of the 'ON' code sequence and the fourth digit of the 'OFF' code sequence are
factory set at '*' and '#' respectively. To enable user selection of the fourth digits, it is necessary
to remove resistor ‘R8” and install two additional selection switches, S4 and S5, plus IC A3.
When ordering the switches, please use Digital Alert Systems
part number ‘9200002’ for each
of the two switches and part number ‘9120375’ for the IC required.
Consult the PC board layout in Figure 1, on Page 4, for the location of the parts to be removed
and inserted.
CODE SELECTION
The hexadecimal rotary switches on the front edge of the 3185E determine each digit in the
code sequence. 0 through D select the corresponding DTMF digit to be decoded. The letter 'E'
on the rotary switch represents the '*' DTMF digit and the letter 'F' on the rotary switch
represents the '#' DTMF digit.
As stated before, the 3185E is factory set to decode a 4-digit 'ON' code sequence and a 4-digit
'OFF' code sequence. The first three digits of the code sequence are the same for 'ON' and
'OFF' commands. The fourth digit for the 'ON' code sequence is factory set to '*', and the fourth
digit for the 'OFF' code sequence is factory set to '#'.
It is not necessary to power down the 3185E when you are programming the code sequence.
The 3185E program will read the switch settings each time a code sequence is received.
Consult FIGURE 1 on page 4 for location of switches and their designations.
