Four timing ranges
Select 1–30 seconds, 2–60 seconds, 1–30 minutes or 2–60 minutes using the module DIP switches.
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Bolec TM301 Multi Function Timer 12/24VDC
$220.00
TM301 Multi-Function Timer – 12/24VDC
The TM301 is a compact electronic timing module for diesel-engine preheat,
alarm delays, turbo cool-down, reversing alarms and automatic control systems.
Select the correct 12VDC or 24VDC supply setting and timing range
using the module DIP switches.
- Four selectable ranges: 1–30 seconds, 2–60 seconds, 1–30 minutes and 2–60 minutes
- Volt-free changeover relay contacts: C / NO / NC
- Contact rating: 3 A at 12VDC or 1.5 A at 24VDC, resistive
- Compact 58 × 42 × 29 mm enclosure
Product document:
The TM301 datasheet includes dimensions, supply-voltage selection,
timing ranges and relay contact ratings.
Product resources
BOLEC Product catalogue / Timer module overview
Automotive and equipment timer module
TM301
Versatile 12/24V Timer Module
- 12V / 24V DC
- 4 selectable ranges
- Volt-free C / NO / NC output
- 58 × 42 × 29 mm
bolec.com.au | sales@bolec.com.au | 0480 312 400
TM301 technical overview
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.
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.
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.
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.
| Supply voltage | 12 VDC or 24 VDC, selected by DIP switch |
|---|---|
| Timing ranges | 1–30 seconds; 2–60 seconds; 1–30 minutes; 2–60 minutes |
| Output type | 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 datasheet or instruction document. The Downloads section below provides the available datasheet 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.
Download TM301 datasheet Open the TM301 datasheet with dimensions, voltage selection, timing ranges and relay contact ratings. Request the instruction manual Email Bolec for the latest controlled TM301 instructions. Application support Ask about timing range, circuit suitability or output interfacing.
The controlled Bolec document and markings on the supplied product take precedence if any difference is found.
Application guides
Related guides
Read practical application notes and product guides from Bolec Electronics.
Case Study: Protecting Firepump Solenoids with TM301 Timer
Case Study: Protecting Firepump Solenoids with TM301 Timer Industry: Firepump Systems Product Used: Bolec TM301 Timer Module Application: Auto Stop Signal Cut‑Off The TM301… Read guide
Reliable Glow Plug Timing with the TM301 Timer
Reliable Glow Plug Timing with the TM301 Timer Starting a diesel engine, especially in colder climates, presents challenges that are not typically encountered in… Read guide
The TM301 Timer: Your Go-To Solution for Preheat, Delay, and Safety Timing
Mastering Time Control in Automotive and Industrial Systems with the Bolec TM301 Introduction In today’s fast-paced world of vehicle electronics, control systems, and industrial… Read guideRelated products
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