Why Choose the ABB CT-MFS.21S Multifunction Timer?
The ABB CT-MFS.21S is a versatile multifunction electronic time relay from the ABB CT-S timer range, designed to provide flexible timing and switching functions for industrial control and automation systems. It combines ten selectable timing functions with two changeover relay outputs, making it suitable for a wide variety of control applications.
The CT-MFS.21S provides 10 time ranges from 0.05 s to 300 h and operates from a universal 24–240 V AC/DC control supply. Its two volt-free control inputs can be used to start, stop or pause timing functions, while a remote potentiometer can be connected for fine adjustment of the selected time delay.
The timer features 2 c/o (SPDT) relay contacts rated at 250 V / 4 A, with the second changeover contact also selectable as an instantaneous contact. The 22.5 mm wide housing uses screw connection technology and is designed for straightforward DIN rail installation in industrial control panels.
Key Advantages
- Versatile multifunction electronic time relay for industrial automation.
- 10 selectable timing functions in one device.
- 10 time ranges from 0.05 s to 300 h.
- Universal 24–240 V AC/DC control supply.
- 2 c/o (SPDT) relay outputs for flexible switching.
- Second c/o contact can be selected as an instantaneous contact.
- Two volt-free control inputs for starting, stopping or pausing timing.
- Remote potentiometer connection for fine adjustment of timing.
- Compact 22.5 mm wide DIN rail housing.
Key Features
- ABB CT-S timer range.
- 10 timing functions: ON-delay, OFF-delay with auxiliary voltage, impulse-ON, impulse-OFF with auxiliary voltage, symmetrical ON- and OFF-delay, flasher starting with ON, flasher starting with OFF, star-delta change-over with impulse, pulse former and ON/OFF function.
- 10 selectable time ranges from 0.05 s to 300 h.
- 24–240 V AC/DC rated control supply.
- 2 c/o (SPDT) contacts.
- 250 V / 4 A rated output contacts.
- Two volt-free control inputs.
- Remote potentiometer connection for fine timing adjustment.
- Second c/o contact selectable as an instantaneous contact.
- Three LEDs for operational status indication.
- Front-mounted operating controls for precise adjustment.
- Screw connection technology with double-chamber cage terminals.
- DIN rail mounting for control cabinet installation.
Flexible Timing for Industrial Automation
The ABB CT-MFS.21S provides a broad selection of timing functions within a single control device, allowing one timer to handle applications ranging from conventional ON-delay and OFF-delay operation through to impulse, flasher, pulse-forming and star-delta timing sequences. This flexibility can simplify control panel design where different timing requirements need to be accommodated.
Its universal AC/DC control supply, volt-free control inputs and two changeover relay outputs make the CT-MFS.21S suitable for integrating timing functions into industrial automation equipment. The optional remote potentiometer provides additional flexibility where timing needs to be adjusted away from the timer itself.
Typical Applications
- Industrial automation and control panels.
- Machine sequencing and timed control.
- Motor control and star-delta starting sequences.
- Flashing and signalling applications.
- Timed switching and pulse generation.
- Conveyor and production machinery control.
- Process automation and equipment sequencing.
- Applications requiring adjustable ON/OFF timing.
