Data Sheet

44
CEM-C21
Electrical energy meters for partial consumption
Three-phase electrical energy meter
with direct measurement, assembly on DIN rail
Three-phase electrical energy meter for direct measurements of up to 60 A. Built-in LCD display
(7 digits) with rotating screen system. Features built-in RS-485 communications. Also features 2
buttons (1 sealable button) for viewing all the measured information.
Other features include:
Class 1 active energy, Class 2 reactive energy
Complies with the IEC 62052-11 standards (international standards)
Compact size (4 modules, 72 mm)
Resettable partial meter
1 programmable impulse output, in accordance with DIN 43864 (CEM-C21-T1)
1 Digital input for Tariff selection and impulse count (CEM-C21-DS)
Indicates bad connections on the screen
Energy storage, even in the case of bad connections
Redundant meter for verifying the energy allocated by the energy provider.
Energy consumption report sent to a remote system (PLC/BMS).
Cost control for achieving a high consumption/unit ratio in industrial processes.
Display of electrical parameters (V, A, kW, kW·h, PF, etc.), per phase and three-phase.
Description
Applications
Technical features
Power circuit Rated voltage 230 Vac
Tolerance ± 20%
Frequency 50...60 Hz
Consumption < 2 W / 10 VA
Voltage measurement circuit Connection Three-phase
Reference voltage 3 x 127/220...3 x 230/400 Vac
Frequency 50 / 60 Hz
Self-consumption < 2 W / 10 VA
Current measurement circuit Nominal current I
n
5 A
Maximum current 65 A
Self-consumption < 0.1% of I
n
Accuracy Active Energy Class 1 (IEC 62053-21)
Reactive Energy Class 2.0 (IEC 62053-23)
Communications Hardware RS-485
Protocol Modbus
Baud rate 9600, 19200, 38400 bps
Impulse output
(CEM-C 21-T1)
Type Optocoupled
Electrical features max. 24 Vdc 50 mA
Digital input
(CEM-C21-DS)
Type Potential-free contact NPN
Isolation Optoisolated
Function Tariff selection (T1/T2) and impulse count
Environmental features Operating temperature -25 ºC...+70 ºC
Relative humidity 5%...95% without condensation
Mechanical features Protection degree IP 51 installation / IP 40 terminals
Dimensions 70 x 90 x 64 mm
Weight 340 g
Material ABS + V0 self-extinguishing polycarbonate
Standards EN 50470-1, EN 50470-3, IEC 62052-11, IEC 62053-21, IEC 62053-23, MID

Summary of content (2 pages)