Inovance H3U Series - Page 672

671
10
10 Extension Modules 10.2.4 Analog Input Module (AM600-4AD)
●
External wiring
Analog input wiring diagram
+15V
15V
450k
¡
450k
¡
*2
*1Shield grounding
V+
V-
I+
+15V
15V
450
k
¡
450k
¡
*2
*
1
V+
V
-
I+
*5
*
3
250¡
*4
AGND
AGND
FG
(a)
Voltage input
(b)
Current input
24V
COM
+15V
-15V
+24V
DC/DC
conveter
fliter
24Vdc
external
power
AGND
AGND
Shield grounding
Must be
connected
Input impedance
Input impedance
• Use 2-core shielded twisted pair cable for analog signal.
• Indicates input impedance of 4AD.
• For current input, terminal (V+) must be connected to terminal (I+).
• When the input signal is a differential signal, "AGND" can be connected to analog ground of compatible devices to
eliminate the difference of common mode voltage between devices and ensure the accuracy of module sampling.
• The module should be mounted on a well-grounded metal bracket, and ensure that the metal shrapnel at the
bottom of the module is in good contact with the bracket.
(3) Wiring precautions
●
Do not bundle the cable together with AC cable, main lines, high voltage cable and so forth; otherwise,
it may result in an increased noise, surge and induction.
●
Apply single-point grounding for the shielding of shielded cable and solder sealed cable.
●
Tubed and solderless crimp terminal cannot be used with terminal block. Using marking sleeve or
insulation sleeve to cover the cable connector part of the crimp terminals is recommended.