LINETRAXX® CMD420/421

Current monitoring devices for monitoring 3AC currents for overcurrent and undercurrent using measuring current transformers or current monitoring with window discriminator function
Undercurrent and overcurrent monitoring in AC systems with prealarm and main alarm or current monitoring with window discriminator function
Current monitoring using current transformers, suitable for standard transformers x/1 A, x/5 A (depending on the device type)
Transformation ratio n allows adaptation to all standard current transformers x/1 A, x/5 A
Start-up delay, response delay and delay on release can be set
Adjustable switching hysteresis
r.m.s. value measurement AC
Digital measured value display via multi-functional LC display
LEDs for Power On, Alarm 1, Alarm 2
Fault memory for the operating value
Cyclical self-monitoring
Test/reset button internal
Two separate alarm relays with 1 changeover contact each
N/C or N/O operation and fault memory behaviour selectable
Password protection for device setting
Sealable transparent cover
2-module enclosure (36 mm)
Push-wire terminal (two terminals per connection)
RoHS-compliant

CMD420-D-1, CMD421-D-1:
Supply voltage US: AC 16...72 V/DC 9,6...94 V
Frequency range US : 15...460 Hz
CMD420-D-2, CMD421-D-2:
Supply voltage US: AC/DC 70...300 V 
Frequency range US: 15...460 Hz
Power consumption: ≤ 4 VA

Undercurrent Lo < I (Alarm 2) n = 1 	AC 0.1...1 A (0.3 A)
Undercurrent Lo < I (Alarm 1) n = 1 	100...200 % (150 %)
Take a maximum nominal current of 1 A into consideration!
Overcurrent Hi > I (Alarm 2) n = 1 	AC 0.1...1 A (0.3 A) (Hi)
Overcurrent Hi > I (Alarm 1) n = 1 	50...100 % (50 %) (Hi)	
Window In > I (Alarm 2) n = 1	AC 0.1...1 A (0.3 A)
Window In < I (Alarm 1) n = 1	50...100 % (50 %)
External current transformer  x/1 A
Transformation ratio n  1...2000 (1)
Relative uncertainty in the range of 42...460 Hz±5 %, ±2 digits
Hysteresis:3...40 % (15 %) 
Number of switching elements: 2 x 1 changeover contacts (K1, K2)
Start-up delay t: 0...300 s (0.5 s)
Response delay ton1: 0...300 s (1 s)
Response delay ton2: 0...300 s (0 s)

History memory (HiS) for the first alarm value data record measured values
Password protection: off/0...999 (off/0)
Connection type: Push-wire terminals/Screw terminals 
EMC IEC 61326-1
Operating temperature:-25...+55 °C

Manufacturer:
Bender GmbH & Co. KG
Londorfer Straße 65
35305 Gruenberg

Type: CMD420-D-1	
Type: CMD421-D-1
Article number: B73060006	
Article number: B73060008
Type: CMD420-D-2	
Type: CMD421-D-2
Article number: B73060007	
Article number: B73060009