Technical data
43
CMD420_421-DM_D00224_01_M_XXEN/08.2016
Time response
Start-up delay
t
.................................................................................................................................. 0…300 s (0.5 s)*
Resolution of setting
t
(0…10 s) .......................................................................................................................... 0.1 s
Resolution of setting
t
(10…99 s) .......................................................................................................................... 1 s
Resolution of setting
t
(100…300 s) ................................................................................................................... 10 s
Operating time
t
ae
........................................................................................................................................... ≤ 130 ms
Response time
t
an
............................................................................................................................................
t
an
=
t
ae
Device release time
t
re
................................................................................................................................... ≤ 135 ms
Release time
t
off
.................................................................................................................................................. t
off
=
t
re
Recovery time
t
b
............................................................................................................................................. ≤ 300 ms
Displays, memory
Display....................................................................................................... LC display, multifunctional, not illuminated
Display range, measured value (r.m.s. value) x transformation ratio n.................................CMD420: AC 0…1 A x n
.......................................................................................................................................... CMD421-DM: AC 0…5 A x n
Operating uncertainty in the range 42…460 Hz ............................................................................... ±5 %, ±2 digits
Measured-value memory (HiS) for the first alarm value ................................................ data record measured values
Password...................................................................................................................................on/off / 0…999 (OFF)*
Fault memory (M) alarm LEDs ............................................................................................................on/off/con (on)*
Outputs, analogue
Voltage output:
Open circuit voltage (terminals open) .......................................................................................................... ≤ DC 20 V
Voltage output............................................................................................................................................ DC 0…10 V
Load...................................................................................................................................................................... ≥ 1 KΩ
Current outputs:
Short-circuit current ......................................................................................................... ≤ 30 mA, short-circuit proof
Current output ..................................................................................................................................... DC 0/4…20 mA
Load.................................................................................................................................................................... ≤ 500 Ω
Current output .........................................................................................................................................DC 0…400 μA
Load................................................................................................................................................................. ≤ 12.5 kΩ
Tolerance of the analogue outputs ..................................................................................................................... ±10 %