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Rexroth MDD065D-N-040-N2L-095PB1
Rexroth MDD065D-N-040-N2L-095PB1

Phoenix Contact MCR-PSP-DC

Product Name​
Phoenix Contact MCR-PSP-DC Programmable Limit Value Switch
Product Introduction​
The MCR-PSP-DC is a programmable threshold or limit value switch from the Phoenix Contact MCR measurement and control range. It acquires voltage, current, resistance, RTD and thermocouple signals, compares them with adjustable setpoints and operates galvanically isolated relay outputs for alarm or control duties.
Category:
Description
Technical Specifications​
  • Model: MCR-PSP-DC
  • Order reference: 2811925
  • Supply voltage: 20 VDC to 30 VDC, nominal 24 VDC
  • Current consumption: less than 60 mA
  • Power dissipation: 1.8 W nominal
  • Channels: one measuring input, two relay output channels
  • Measuring rate: 2 Hz
  • Transmission error: 0.1% of final value
  • Temperature coefficient: 0.01% per Kelvin maximum
  • Voltage input: -30 V to +30 V, input resistance 200 kΩ
  • Current input: -30 mA to +30 mA, input resistance 50 Ω
  • Resistance input: 0 Ω to 8000 Ω, 2-wire
  • RTD input: Pt and Ni sensors, 2-wire, 3-wire and 4-wire
  • Thermocouple input: B, E, J, K, L, N, R, S, T, U types
  • Relay outputs: two changeover contacts, two setpoints each
  • Relay material: AgNi 0.15 with hard gold plating
  • Switching voltage: 250 VAC maximum
  • Switching current: 2 A AC maximum
  • Response delay: 0 s to 2 s adjustable
  • Isolation test: 1 kVAC input to supply, 50/60 Hz, 60 s
  • Connection: pluggable screw terminals, 0.2 mm² to 2.5 mm², strip 8 mm
  • Protection: IP20, DIN rail mounting
Functional Features​
  • Freely programmable measuring function for universal analog inputs
  • Galvanic isolation between input and supply eliminates ground loops
  • Dual relay channels with independent high and low setpoints
  • Adjustable response delay prevents nuisance tripping
  • LED status display for power, measured value range and relay state
Application Scenarios​
  • Temperature alarm trips using RTD or thermocouple sensors
  • Overvoltage and overcurrent limit monitoring in DC systems
  • Resistance threshold detection for level or position sensors
  • Building and process plant limit switching
  • Panel-building alarm annunciation and safety interlock support
Performance Parameters​
  • 2 Hz sampling provides stable monitoring for slow process variables
  • 0.1% transmission accuracy maintains precise threshold control
  • 1 kVAC isolation supports mixed-signal cabinets
  • Two independently configurable relays cover redundant alarm paths
Material And Construction​
  • Flame-retardant molding with green housing identification
  • Plug-in screw terminal block with M3 screws
  • Silver-nickel gold-plated relay contacts for low-contact resistance
  • DIN 35 mm rail clip and labeled configuration switches or software port
Working Principle​
The input stage conditions voltage, current, resistance or temperature signals and converts them to a standardized digital measured value. The internal comparator evaluates the measured value against programmed setpoints. When the value crosses a limit and the response delay elapses, the corresponding relay changes state. Isolation barriers separate field input from the 24 VDC supply and relay outputs.
Installation Requirements​
  • Mount on 35 mm DIN rail inside IP54 or higher cabinet
  • Supply 24 VDC with proper fuse and short-circuit protection
  • Use shielded cable for thermocouple and low-level signals
  • Connect relay outputs to alarm, contactor or PLC input circuits
  • Configure sensor type, range and setpoints before applying field signals
Usage Precautions​
  • Operate only with 20 VDC to 30 VDC supply
  • Do not exceed 250 VAC or 2 A per relay contact
  • Respect IP20 rating and install inside enclosed cabinet
  • Verify thermocouple compensation and RTD wiring type before start-up
  • Prevent ambient condensation and maintain stated temperature range
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