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D.
SPECIFICATIONS.
Size
9.43" x 2.9" x 1.13"
Mounting
#6 mounting holes on wide
Power requirements
+8 to 20 VDC @ 80 mA nominal
Relay Contacts
Single Pole Double Throw
Relay Contact Ratings
1A 30 VDC
Max Input Logic
0 to +12V max. ( 1.6 mA in @ 12V )
Voltage Range
Max Input Voltage
+1 V
to Sense Logic Low
Input Current
50 uA
(using external switch)
Ringer Equivalence
0.2
Access Codes
1023 four-digit codes
Access Code Tries
3
Before Hang-Up
FCC Registration Number 3H1USA-20367-OT-N
E.
BASIC OPERATION.
The 300RC allows the remote control of 10 SPDT relays from
any Touch-Tone telephone over the standard telephone network. It
also allows the user to check the status of 10 logic-level or switch
contact inputs through easily distinguishable audio tones.
The 300RC is connected to a phone line with a standard 6
position modular cable. When the 300RC is called, it will answer
after the 3rd ring. If the access code feature is enabled, the caller
will hear the access code prompt a "beep boop" .When the correct
access code is entered, the caller will hear the 3 tone "command
prompt."
At this time the caller may turn any of the relays on or off
using the touch-Tone keys on the telephone, request the status of
any relay, or request the status of any of the 10 logic inputs. The
status is indicated by either a single low-pitched tone for "off", or
two short high-pitched tones for "on".
An error by the caller is indicated by a low-pitched pulsing
tone.
F.
SETTING THE ACCESS CODE.
The access code is a four digit number that the user must
enter before the 300RC will allow any further functions to be used.
This code is set into the 300RC by a switch under the top cover.
This cover is removed by removing two small screws. If the access
code is set to 0000, the unit will allow all functions without the
caller first entering an access code.
The access code is determined as shown in figure 2.
Only switches 3 to 12 (the 10 right hand positions) are used
for the access code. Each switch has a digit value as shown in the
diagram. In the example shown, the first digit, 5, is determined by
the 1 and 4 switches being set to the "on" position, and 2 to "off".
The next digit, a 3, consists of the 4 being off and the 1 and 2 being
on. The last digit has only one switch, therefore the last digit of the
access code must be a 1 or a zero.
This scheme may be familiar to you as the octal number
system. If the code is set to 0000 (all switches in the off position)
no access code will be needed to use the 300RC. There are 1023
usable 4 digit codes, with the highest number being 7771. Note
that none of the digits can be 8 or 9.
G.
INSTALLING THE 300RC.
To install the 300RC, connect it to the phone line with a
standard 6 position modular cable, as you would any extension
phone. Connect the wall power adapter. The red POWER LED
should light.
and narrow flanges
110VAC wall adapter supplied
4
ON
1
2
3
Figure 2. Setting Access Code.
The 300RC may be mounted to a wall or to a blank rack panel
using the mounting holes provided. All external connections to the
relays and logic inputs are made to the miniature terminal strips.
Strip about 1/8" of insulation off the wire, insert it into the hole,
and tighten the screw. The relay symbols on the box are shown in
the "off" position.
For safety, do NOT connect 110VAC circuits to the relays.
Each logic or switch input is provided with two terminals, a
ground pin and an input pin. These terminals may be connected to
any pair of switch contacts, such as external relays, thermostats,
magnetic reed door switches, etc. The inputs may also be con-
nected to external open-collector circuits or 5 - 12V logic signals.
Note that all the inputs have the same common. This common
is not connected to power- main's ground since the AC adapter
module output is isolated, however the input common is internally
connected to the circuit ground and the metal enclosure of the
300RC.
If a DC power supply other than the supplied wall adapter is
used, note that the input common and metal enclosure are
connected to the negative side of the DC input jack. Any DC power
source supplying +8 to 20VDC at 80 mA may be used.
H.
SETTING THE OTHER SWITCHES.
The left two switches (switch positions 1 & 2 in figure 2)
enable two 300RC options:
If switch #1 is on then after a power interruption the relays
will retain their previous states when power is restored. (The
relays are magnetic latching.) If switch #1 is off, then all relays
will be cleared to their "off" state when power is restored.
Switch #2 puts the 300RC into the Interlock Mode. In this
mode only one relay may be on at a time. If any relay is turned on
with a momentary touch-tone from the caller, all other relays will
be turned off. This mode would allow the 300RC to be used as a
simple remote-control audio routing switcher, for instance. In this
application, all the relay commons could be tied together and
connected to the audio destination, and all the relay normally-open
contacts would be connected to various audio sources.
If switch #2 is off, the 300RC is in its normal mode, allowing
individual control of all 10 relays.
I.
CALLING THE 300RC.
When a call is received by the 300RC, the yellow RING LED
will light each time the ringing signal is detected. The call will be
answered after the third ring. At this time the LINE LED will
light, and the caller will hear a "beeboop", indicating that the
300RC has answered the line. If an access code is required, the
code should be entered at this point. If a correct access code is not
entered after three tries, or if more than 48 seconds elapses before
a correct code is entered, the 300RC will hang up.
-2-
ON - RETAIN RELAY STATES AT POWER-UP
ON - RETAIN INTERLOCK MODE
4 DIGIT ACCESS CODE(SHOWN: 5320)
(0000 - NO CODE REQ'D)
2
1
4
2
1
4
2
4
5
6
7
8
9
10
1
1
11
12
290A3250
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