Digital guide
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Kollmorgen MMC-SD-0.5-230-D
Product Brief: A DIN-rail mounted motor protection/monitoring module designed to work with Kollmorgen servo motors equipped with PTC or KTY thermal sensors, or as a standalone overload monitor for induction motors with thermal sensors. “SD” = Solid State / Monitoring type; “0.5” = settable current or sensor trip range reference (0.5 A base or PTC trip threshold reference); “230” = 230 VAC control supply; “D” = DIN rail housing with screw terminals. Provides relay contact output for machine shutdown on overtemperature or parameter violation. In many Kollmorgen legacy systems this was used alongside BDS4/SERVOSTAR to monitor PTC strings.
Detailed content
Supply Voltage: 230 VAC ± 10 %, 50/60 Hz (or 24 VDC on some -D variants — verify nameplate; -230- = 230 VAC)
Sensor Input: PTC thermistor string per DIN 44081/44082 (typical 1–6 PTCs in series, cold < 1.5 kΩ, trip > 1.8 kΩ < 4 kΩ) OR KTY84 (model-dependent — SD suffix often = PTC)
Trip Threshold: PTC trip at > 1.8 kΩ (switching point typically < 4 kΩ per DIN 44081)
Output Relay: 1 × SPDT (Form C) changeover contact, rated 5 A / 250 VAC resistive
Setpoint Adjustment: Potentiometer or DIP for sensor type / trip delay
Power Consumption: < 3 VA
Reset Mode: Automatic on sensor cool-down below reset hysteresis (~300–500 Ω below trip)
Mounting: 35 mm DIN rail (EN 60715)
Dimensions (H × W × D): ≈ 90 mm × 22.5 mm × 75 mm (standard DIN module)
Operating Temperature: –10 °C to +55 °C
Protection Degree: IP20 (terminals IP20, housing IP40)
Compliance: CE
Applicable Industries: Motor protection in legacy servo/induction systems — packaging machines, conveyors, pumps, fans where Kollmorgen motors with PTC are used
Installation Requirements: Mount on DIN rail inside control panel; wire PTC sensor in series (do NOT parallel); connect supply 230 VAC; wire relay NO/NC contact to machine safety chain / drive inhibit; test via manual TEST button after wiring.
Usage Notes: This is a legacy accessory — modern AKD/S700 drives read KTY84/PTC directly and provide software overtemperature protection; MMC-SD is used when external monitoring is required (e.g., older BDS4 or standalone induction motor with PTC); failed/open PTC sensor (broken wire) is detected as overtemperature (fail-safe); do not exceed max PTC series resistance.
