-103-
Introduction
Note 1: For AM600-4TC
,
the L4+/L4-~L7+/L7- channels are reserved;
Note 2: For AM600-8TC
,
the L7 sampling channel is used for compatibility which supports normal
thermocouple sampling and external cold-side compensation. When the cold side of the thermocouple
is far from the module
,
and the temperature difference is large
,
use the channel for external cold-side
compensation if the requirement on temperature accuracy is high. In this case
,
you need to connect the
PT100 thermal resistor for compensation
,
and only CH0 to CH6 of the module are used for TC sampling.
■
External wiring
TC
24 V
COM
FG
Filter
DC
/
DC
converter
Filter
Filter
L0
+
L0-
L7
+
L7-
AGND
AGND
AGND
AGND
5 V
5 V
5 V
24 V
external DC
power
TC
Filter
L6
+
L6-
AGND
5 V
TC sampling
﹡
2
﹡
2
﹡
5
﹡
3
﹡
1
For external cold-side
compensation
PT
﹡
4
TC
﹡
2
﹡
1
TC sampling
TC sampling
For internal cold-side
compensation
﹡
1
﹡
1
﹡
2
Figure 5-47 AM600-8TC module wiring
NOTE
◆
*1 Use shielded compensation wires.
◆
*2 If there is distance between cold-side compensation and thermocouple end
,
and no
compensation wire is used
,
the temperature measurement is abnormal.
◆
*3 Channel L7 can use PT100 thermal resistors for cold-side compensation
,
and you need to
use the software to enable this channel.
◆
*4 If the module uses internal cold-side compensation
,
the L7 channel can be used for normal
thermocouple sampling
,
and the wiring is as shown in L0 - L6 in the preceding figure; if the
module uses external cold-side compensation
,
you need to connect the PT100 thermal
resistor to the L7 channel
,
and the wiring is as shown in L7 in the preceding figure.
◆
*5 The module must be mounted on a well-grounded metal bracket
,
and ensure that the
metal spring plate at the bottom of the module is in good contact with the bracket.
