DTMF Telephone Relay Switcher DTMF Telephone Relay Switcher
This device connects to your telephone line and has 4 relay outputs capable of switching 5 amps max. You can then call your number using a DTMF (tone dialling) telephone from anywhere in the world and remotely turn... Electronics > Circuit Boards & Components > Printed Circuit Boards > Development Boards 3140KT 3140KT 3140KT 95.95 Quasar Electronics Limited
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DTMF Telephone Relay Switcher

AS3140KT - DTMF Telephone Relay Switcher
Ability Level 4: AdvancedPre-Assembled and Kit versions available
View Quasar Electronics Kits Modules Range

Simply plugs into your telephone line* and provides 4 independently controllable relay outputs. You can then call your number using a DTMF (tone dialling) telephone from anywhere in the world and remotely turn on/off any of the relays as desired.

It is possible to control a wide variety of devices via the relays for example security lights, heating and pump controllers, computers, etc.*

Each output is capable of switching resistive loads up to 48Vac/24Vdc @ 5 amps max and have high quality detachable screw terminal block connectors. (*NB The relays are rated to switch up to 240Vac mains voltage but the exposed screw terminal block heads would need to be placed inside a suitable enclosure to prevent exposure to hazardous voltages).

The user can set a 4-digit security Password, Tamper facility, number of Rings to Answer, Auto Hang-up time and Lockout facility. Compatible with all European, North American and Asian phone networks.

Supplied with a high quality custom made case.

PowerRegulated 12-15Vdc (Order Code 660.446UK is suitable - some switch mode power supplies may not be compatible with this product)
Current Consumption150mA max (30mA standby plus 30mA per active relay)
Outputs4 x SPDT Relays
Maximum Output
Load (Resistive)
Up to 240Vac* or 28Vdc @ 5 Amps max. per relay (Relay Datasheet)
Output ConnectionsNO, NC, C (Relay FAQ)
User Settings1. Password (4 - 8 digits)
2. Anti-Tamper (1 - 9 attempts before Lockout; 0 disables feature)
3. Rings to answer (1-9; 0 disables auto-answer)
4. Auto hangup time (1 - 99 seconds; 0 disables feature)
5. Lockout time (1 - 99 minutes; 00 disables feature)
Dimensions130W x 110D x 30H mm
ConnectionsPower: 5.5 x 2.5mm DC socket
Relays: 4 x 3-way pluggable screw terminal blocks
Phone: RJ11 type
Compatibility* This product can be connected to any analogue or broadband phone line and both corded or cordless (analogue and DECT) telephone sets and is operated using simple DTMF tones.
Product FormatsSELF-ASSEMBLY Electronic Kit (KT) or
PRE-ASSEMBLED Electronic Module (AS) Product Formats Info
DocumentationUser Manual
Out of stock items are presented below. Click an item name to receive an in stock email notification as soon as it becomes available.
PRE-ASSEMBLED DTMF Telephone Relay Switcher Module
Quasar AS3140 - PRE-ASSEMBLED DTMF Telephone Relay Switcher Module
£79.13 Exc VAT, £94.96 Inc VAT
SELF-ASSEMBLY DTMF Telephone Relay Switcher Electronic KIT
Quasar 3140KT - SELF-ASSEMBLY DTMF Telephone Relay Switcher Electronic KIT
£66.63 Exc VAT, £79.96 Inc VAT

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