RCM 202-AB - Residual current monitor type A & B+
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for recording, evaluating and monitoring residual currents of types A, B and B+ according to IEC 62020 in TN and TT systems (earthed AC systems) using conventional ductable or convertible residual current transformers (type A, B etc.) using a patented measuring method .
Possibility of optical or acoustic warning via external wiring when the residual current limit values are reached and forwarding of the exceeding via the communication interface to, for example, a building control system for permanent residual current monitoring.
Current transformer connection monitoring (wire break or short-circuit monitoring per channel), acquisition of sinusoidal alternating residual currents with frequencies up to 20 kHz (type B+), acquisition of pure direct currents, memory of measured values and extreme values with time stamp, real effective value measurement (True RMS).
The following analysis variables are output:
Individual limit values for type A, type B, type B+ freely configurable
Single frequencies for 1-2000Hz
Spectrum display for 2-20kHz
Measured value display and operation using a two-color LED display (128 x 64 pixels), 3-button operation, self-test and test display, user guidance in German, English and Spanish freely selectable, integrated Modbus RTU termination (120 ohms) using a switch, password-protected parameterization, storage of 18,725 data records (ring memory) with date and time.
Device dimensions (W x H x D): 71 x 90 x 73 (4 TE)
Net Weight: 170g,
Design: DIN rail installation device
Degree of protection according to EN 60529: IP20
Protection class: III (3)
Heat dissipation: max. 8 W
Operating temperature range: -10° C - +55° C (K55)
Temperature range transport & storage: -25° C - +70° C
Operating altitude: 0 to 2000 m
Supply voltage: 85 to 305 V AC ( 50 / 60 Hz )
Rated current Ib: 4 kA
Rated impulse voltage: 4 kV
Number of residual current monitoring channels: 2
Measuring range AC / DC: 10m A to 20 A
Response / reset delay: 10 ms to 10s
Number of digital outputs: 2
Switching voltage: max. DC 60V, AC 30V
Maximum current: 350mA
Number of analogue outputs: 2
Type of analog outputs: 4 to 20 mA
Supply voltage of the analog outputs: DC 12 to 24 V (external)
Required decoupling: Galvanic, when using both outputs
Type: RS485 interface
Protocol: Modbus RTU
Baud rate: 9.6 to 115.2 kbaud
Connection to higher-level systems (GLT) using all compatible Modbus gateway devices from the manufacturer.
Mounting accessories, documentation, coordination of the design with the practical application and the measured variables including their recording intervals, compatible residual current transformers, configuration and parameterization of the device, delivery, installation and connection.
Manufacturer: Janitza electronics GmbH
Type: RCM 202-AB
Art. No.: 1401627
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