Official DistributorBy ABB
SKU
MPN
1SVR740722R1400
Weight
0.15 kg
The CM-MSS.21P belongs to the CM-MSS thermistor motor protection relay range. It operates with a rated control supply voltage of 24 - 240 V AC / DC and has a 1 n/c + 1 n/o (SPDT) output with contacts rated at 250 V / 4 A. It features one sensor circuit to monitor PTC temperature sensors and works according to the closed-circuit principle. The sensor circuit of the CM-MSS.21P is short-circuit, as well as interrupted-wire monitored and the relay will be reset automatically after the failure has been removed. This protection relay is certified according to the ATEX directive 94/9/EC. A sealable transparent cover for protection against unauthorized changes is available as accessory. The device offers maintenance free Easy Connect Technology with push-in terminals.
Technical Specifications
Dimensions
| Product Net Width | 22.5 mm |
| Product Net Height | 85.6 mm |
| Product Net Depth / Length | 103.7 mm |
| Product Net Weight | 0.118 kg |
Technical
| Function | 1 sensor circuit |
| Function | Short-circuit detection |
| Function | Auto reset |
| Function | ATEX approved |
| Function | Dynamic interrupted wire detection |
| Function | Non-volatile fault storage |
| Rated Control Supply Voltage (Us) | 24 ... 240 V AC/DC |
| Rated Operational Voltage | Auxiliary Circuit 250 V AC |
| Rated Frequency (f) | Supply Circuit 15 ... 400 Hz |
| Output | 1 n/o + 1 n/c contact |
| Terminal Type | Screwless Terminals |
| Rated Operational Current AC-12 (Ie) | (230 V) 4 A |
| Rated Operational Current AC-15 (Ie) | (230 V) 3 A |
| Rated Operational Current DC-12 (Ie) | (24 V) 4 A |
| Rated Operational Current DC-13 (Ie) | (24 V) 2 A |
| Minimum switching capacity | 24 V |
| Minimum switching capacity | 10 mA |
| Rated Impulse Withstand Voltage (Uimp) | Output Circuit 1 / Output Circuit 2 4 kV |
| Rated Impulse Withstand Voltage (Uimp) | Output Circuit 4 kV |
| Rated Insulation Voltage (Ui) | Measuring Circuit / Output Circuit 300 V |
| Rated Insulation Voltage (Ui) | Output Circuit 1 / Output Circuit 2 300 V |
| Rated Insulation Voltage (Ui) | Supply Circuit / Measuring Circuit 300 V |
| Rated Insulation Voltage (Ui) | Supply Circuit / Output Circuit 300 V |
| Degree of Protection | Housing IP50 |
| Degree of Protection | Terminals IP20 |
| Overvoltage category | III |
| Pollution degree | 3 |
| Short-Circuit Protective Devices | Output Circuit NC - F Type Fuses 10 A |
| Short-Circuit Protective Devices | Output Circuit NO - F Type Fuses 10 A |
| Electrical Durability | AC-12 100000 cycle |
| Mechanical Durability | 30000000 cycle |
| Connecting Capacity | Flexible 2x 0.5 ... 1.5 mm² |
| Connecting Capacity | Rigid 2x 0.5 ... 1.5 mm² |
| Wire Stripping Length | 8 mm |
| Mounting Position | 1 ... 6 |
| Mounting on DIN Rail | TH35-7.5 (35 x 7.5 mm Mounting Rail) acc. to IEC 60715 |
| Mounting on DIN Rail | TH35-15 (35 x 15 mm Mounting Rail) acc. to IEC 60715 |
| Standards | CAN/CSA C22.2 No.14 |
| Standards | EN 50495 |
| Standards | IEC/EN 63000 |
| Standards | IEC/EN 60079-7 |
| Standards | IEC/EN 60947-5-1 |
| Standards | IEC/EN 60947-8 |
| Standards | UL 508 |
Technical UL/CSA
| Maximum Operating Voltage UL/CSA | Output Circuit 300 V AC |
| Contact Rating UL/CSA | B300 |
| Connecting Capacity UL/CSA | Flexible 2x 18-16 AWG |
| Connecting Capacity UL/CSA | Rigid 2x 20-16 AWG |
| Pilot Duty UL/CSA | B300 |
| Flammability According to UL94 | V-0 |
Why Proax for ABB CM-MSS.21P?
Proax is an authorized distributor of ABB CM-MSS.21P and one of ABB's largest distributors in North America. Our highly skilled in-house technical team is ready to assist with any technical needs.
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Additional Information
| Alternate Names | CMMSS21P |
| Pack Size | 1 |
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