Ma Input Module (Mim) - ABB REG670 Technical Manual

1MRK502052-UEN B
21.2.11
21.2.11.1
21.2.11.2
Technical manual
Breaking capacity for AC, cos
j>0.4
Breaking capacity for DC with L/R
< 40 ms
Maximum capacitive load
Maximum 72 outputs may be activated simultaneously. After 6 ms an
additional 24 outputs may be activated. The activation time for the 96
outputs must not exceed 200 ms. 48 outputs can be activated during 1
s. Continued activation is possible with respect to current
consumption but after 5 minutes the temperature rise will adversely
affect the hardware life. Maximum two relays per BOM/IOM should
be activated continuously due to power dissipation.

mA input module (MIM)

Introduction
The milli-ampere input module is used to interface transducer signals in the –20 to +20
mA range from for example OLTC position, temperature or pressure transducers. The
module has six independent, galvanically separated channels.
Design
The Milliampere Input Module has six independent analog channels with separated
protection, filtering, reference, A/D-conversion and optical isolation for each input
making them galvanically isolated from each other and from the rest of the module.
For configuration of the input signals, refer to section
SMMI".
The analog inputs measure DC current in the range of +/- 20 mA. The A/D converter
has a digital filter with selectable filter frequency. All inputs are calibrated separately
The filter parameters and the calibration factors are stored in a non-volatile memory
on the module.
The calibration circuitry monitors the module temperature and starts an automatical
calibration procedure if the temperature drift is outside the allowed range.
250 V/8.0 A
48 V/1 A
110 V/0.4 A
220 V/0.2 A
250 V/0.15 A
-
Section 21
IED hardware
250 V/8.0 A
48 V/1 A
110 V/0.4 A
220 V/0.2 A
250 V/0.15 A
10 nF
"Signal matrix for mA inputs
1181