Description
The CT-MFS.21S is a multifunction electronic time relay from the CT-S timer range. It provides 10 timing functions with 10 time ranges from 0.05 s to 300 h. This time relay operates with a rated control supply voltage of 24 – 240 V AC / DC and has a 2 c/o (SPDT) output with contacts rated at 250 V /<span style=”display: inline;” class=”showlongDescription”>… </span><span style=”display:none;” class=’hiddenlongDescription’> 4 A. Two control inputs work with volt-free (floating) triggering.The CT-MFS.21S offers the possibility of connecting a remote potentiometer for the fine adjustment of the time delay. The second of the c/o contacts can be selected as an instantaneous contact. A sealable transparent cover for protection against unauthorized changes is available as accessory. The device offers screw connection technology with double-chamber cage connection terminals. </span><span style=”cursor:pointer; font-weight:bold;” class=”showmore” onclick=”showMore()”><span class=”showmorespan”> Show more</span></span> <span style=”display:none; cursor:pointer; font-weight:bold;” class=”showless” onclick=”showLess()”><span class=”showlessspan”>Show less</span></span>. New original ABB part, traceable to the manufacturer. Availability and price on request.
Technical Specifications
| Function | Remote potentiometer connection |
|---|---|
| Time Range | 0.05 s … 300 h |
| Rated Control Supply Voltage (U<sub>s</sub>) | 24 … 240 V AC/DC |
| Rated Operational Voltage | Auxiliary Circuit 250 V |
| Rated Frequency (f) | 50 / 60 Hz |
| Output | 2 C/O Contacts |
| Rated Operational Current AC-12 (I<sub>e</sub>) | (230 V) 4 A |
| Rated Operational Current AC-15 (I<sub>e</sub>) | (230 V) 3 A |
| Rated Operational Current DC-12 (I<sub>e</sub>) | (24 V) 4 A |
| Rated Operational Current DC-13 (I<sub>e</sub>) | (24 V) 2 A |
| Rated Impulse Withstand Voltage (U<sub>imp</sub>) | Input Circuit 4 kV |
| Rated Insulation Voltage (U<sub>i</sub>) | Input Circuit / Output Circuit 500 V |
| Degree of Protection | Housing IP50 |
| Overvoltage Category | III |
| Pollution Degree | 3 |
| Wire Stripping Length | 8 mm |
| Maximum Operating Voltage UL/CSA | Output Circuit 300 V AC |
| Contact Rating UL/CSA | B300 |
| Timer Relay Type | Impulse OFF |
| Terminal Type | Screw Terminals |
| Electrical Durability | AC-12 100000 cycle |
| Mechanical Durability | Nr. Operations 30000000 cycle |
| Mounting Position | 1 … 6 |
| Mounting on DIN Rail | TH35-7.5 (35 x 7.5 mm Mounting Rail) acc. to IEC 60715 |
| Standards | CAN/CSA C22.2 No.14 |
| Ambient Air Temperature | Operation -40 … +60 °C |
| Maximum Operating Altitude Permissible | Without Derating 2000 m |
| Product Net Width | 22.5 mm |
| Product Net Height | 85.6 mm |
| Product Net Depth / Length | 103.7 mm |
| Product Net Weight | 0.145 kg |
| EAN | 4016779851367 |
| Customs Tariff Number | 85364900 |
| Minimum Switching Capacity | 12 V |
| Short-Circuit Protective Devices | Output Circuit NC – F Type Fuses 6 A |
| Connecting Capacity | Flexible with Ferrule 1x 0.5 … 2.5 mm² |
| Tightening Torque | 0.6 … 0.8 N·m |
| Recommended Screw Driver | 4.5 |
| Connecting Capacity UL/CSA | Flexible 1x 18-14 AWG |
| Tightening Torque UL/CSA | 7.08 in·lb |
| Pilot Duty UL/CSA | B300 |
| Flammability According to UL94 | V-0 |
| Resistance to Shock acc. to IEC 60068-2-27 | 30g 3 shocks 11 ms |
| Country of origin | Germany |
| Manufacturer standard delivery time | 5 days |
| Packaging unit | Box x 1 |
| Product status (supplier data) | Active |
Independent distributor — not an authorised ABB dealer. All technical parameters are taken verbatim from the official ABB product data for this exact order code; packaging, customs and delivery data come from the supplier list entry for the same code.
