The TM301 is a compact 12/24V timer module for preheat, alarm delay, turbo cooldown, reversing alarms, and automatic engine warm-up or cooldown control.
Key features:
12V or 24V operation, selected by DIP switch
Four selectable timing ranges
Normally open and normally closed volt-free relay contacts
Contact rating: 3A at 12VDC or 1.5A at 24VDC resistive
One compact timer for preheat, delay, alarm and cool-down control
A versatile 12/24V timer module with a volt-free changeover relay output.
Four selectable timing ranges make it suitable for a wide range of automotive,
engine and equipment control applications.
12V or 24V selection
Seconds or minutes
Normally open and normally closed contacts
Compact timer module
A4 catalogue layout — print or choose “Save as PDF”.
Product overview
Flexible timing control for 12V and 24V systems
TM301 combines selectable timing ranges with a volt-free changeover relay output,
allowing the module to be integrated into many different control circuits.
Four timing ranges
Select 1–30 seconds, 2–60 seconds, 1–30 minutes or 2–60 minutes using the module DIP switches.
Changeover relay output
Volt-free common, normally open and normally closed contacts provide flexibility when interfacing with external circuits.
Compact installation
The 58 × 42 × 29 mm enclosure suits installations where panel or equipment space is limited.
Product video
See the TM301 timer module
Watch the product overview below without leaving the TM301 page.
TM301 product overview video.
Product video
Watch the TM301 overview online: youtube.com/watch?v=9pc1xAx1ptc
Application examples
Typical TM301 uses
The timer can be incorporated into control systems that require a fixed delay or timed output.
Diesel preheat
Control a timed glow-plug or preheat circuit before engine starting.
Alarm before shutdown
Provide a timed warning period before a shutdown action occurs.
Turbo cool-down
Maintain a timed cool-down period for turbocharged engine applications.
Reversing alarm
Operate a reversing alarm for a fixed time when the circuit is triggered.
Automatic-start systems
Add warm-up or cool-down timing to an automatic engine-start sequence.
General timed control
Use the volt-free relay contacts in other suitable delay or fixed-duration control circuits.
Timing functions
TM301 operating modes and turbo-timer example
This comparison diagram shows how the TM301 can perform many timing functions
associated with the Redarc TIM05 and TIM06, together with an illustrated
delayed turn-off example.
TM301 function comparison and turbo-timer example. Source referenced in the original graphic:
Redarc instructions for TIM05 and TIM06.
Function suitability shown in the diagram
Delayed turn OFF: shown as supported
Delayed turn ON: shown as supported
Temporary output at turn ON: application-dependent
Temporary output at turn OFF: application-dependent
Illustrated turbo-timer sequence
The example shows the ignition remaining ON for six minutes before switch-off,
followed by a three-minute delayed turn-off period. The illustrated total engine
run time is nine minutes.
Confirm the required sequence Functions marked as application-dependent in the comparison graphic may require
specific external wiring or control logic. Send Bolec the required trigger and
output sequence before ordering.
Verified product data
Specifications
The values below are taken from the product information supplied for the existing TM301 page.
Volt-free relay changeover contacts: common, normally open and normally closed
Contact rating at 12 VDC
3 A resistive
Contact rating at 24 VDC
1.5 A resistive
Dimensions
58 × 42 × 29 mm overall
Configuration
Select the supply and timing range
The module uses DIP switches to select its operating voltage and one of four available timing ranges.
Voltage selection
Select the correct 12 VDC or 24 VDC setting before connecting the module to the supply.
Available timing ranges
1–30 seconds
2–60 seconds
1–30 minutes
2–60 minutes
Use the controlled document Refer to the current TM301 specification or instruction document for the exact DIP-switch positions and connection procedure.
Frequently asked questions
TM301 FAQ
Quick answers to the most common questions about supply voltage, timing ranges and relay output.
Can the TM301 operate on both 12V and 24V systems?
Yes. The module supports 12 VDC and 24 VDC. Select the correct supply setting with the DIP switch before connecting power.
What timing ranges are available?
The selectable ranges are 1–30 seconds, 2–60 seconds, 1–30 minutes and 2–60 minutes.
Does the TM301 provide normally open and normally closed contacts?
Yes. The volt-free changeover relay output provides common, normally open and normally closed terminals.
What is the relay contact rating?
The stated resistive rating is 3 A at 12 VDC and 1.5 A at 24 VDC.
Where can I find the exact DIP-switch positions and wiring instructions?
Use the current controlled TM301 specification or instruction document. The Downloads section below provides the available document link and a manual-request option.
Documents and help
Downloads and technical support
Use the controlled product document when configuring, wiring or troubleshooting the timer.
Founded in 1978, Bolec Electronics has developed a portfolio of over 80 products and a reputation that survive and thrive in some of Australia's harshest environments. Bolec Electronics is the OE supplier to some of the world's largest truck and engine manufactures.
Premium quality
Easy to install
lightweight
Designed and made in Australia
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READY TO ORDER? Pack of 10: Bolec TM301 Multi Function Timer 12/24VDC $2,200.00Original price was: $2,200.00.$1,900.00Current price is: $1,900.00.
