Danaher Motion Standalone MMC, Руководство по оборудованию, Страница: 173 / 182

Standalone MMC Hardware Manual 173
Danaher Motion
version 15.1
Operation Details
Appendix A - Operation Details
A.1 Introduction
This appendix describes in detail the operation of many of the sub-systems found
within the MMC Control and Option Modules.
A.2 DC Inputs
Each input is guaranteed “on” at 14 to 30 VDC and guaranteed “off” at 0 to 5 VDC
(polarity doesn't matter). Its on/off state is converted to a corresponding logic 1 or 0.
This logic state is transmitted through the system bus to the application program,
which uses these logic states to control program flow. The logic side of the input is
optically isolated from the field side.
The shaded blocks in Figure A-1 below show the limits specified by the IEC. The lines
show the maximum and minimum V/I of the inputs in this module. The voltage/current
curve in this graph shows that the input module is well within the IEC Type 1 limits.
Figure A-1: Input Characteristics Compared to IEC Standards
U in Volts
UH
MAX
30
U
NOM
24
25
“ON” REGION
20
UH
MIN
15
(UT
MAX
)
10
5
0
-5
.5 2
4
6
8 10
12
14
15
IT
MIN
IH
MIN
INPUT CURRENT
I in
mAMPS
TRANSITION REGION
“OFF” REGION
I
MAX
(UT
MIN
)
UL
MAX
INPUT VOL
T
AGE
MIN MAX