2
User Manual
SCANEX PLUS
AI - X
mV / V
T1 T2 T3 T4
T1 T2 T3 T4
INPUT CHANNELS
All input channels are identical from wiring connection viewpoint. For explanation purpose, the 4 terminals pertaining to each
channel have been marked as T1, T2 ,T3 & T4 in the following pages. The descriptions below apply to all the channels with no
deviations.
Thermocouple
Connect Thermocouple Positive (+) to terminal T2 and Negative (-) to terminal T3 as shown in
Figure 1.3
. Use the correct type of Thermocouple extension lead wires or compensating cable for
the entire distance ensuring the correct polarity throughout. Avoid joints in the cable.
AI - X
TC
T1 T2 T3 T4
T1 T2 T3 T4
AI - X
RTD
T1 T2 T3 T4
T1 T2 T3 T4
DC Linear Voltage (mV / V)
Use a shielded twisted pair with the shield grounded at the signal source for connecting mV / V
source. Connect common (-) to terminal T3 and the signal (+) to terminal T2, as shown in
Figure
1.5.
RTD Pt100 (3-wire or 2-wire)
For 3-wire configuration, connect single leaded end of
RTD
bulb to terminal T2 and the double
leaded ends to terminals T3 and
T4 (interchangeable) as shown in
Figure 1.4.
Use copper
conductor leads of very low resistance ensuring that all 3 leads are of the same gauge and length.
Avoid joints in the cable.
For 2-wire configuration, connect the 2 sensor wires to terminal T2 and T3 (interchangeable). Also
short
terminals T3 & T4.
Figure 1.3
Figure 1.4
Figure 1.5
AI - X
mA
T1 T2 T3 T4
T1 T2 T3 T4
DC Linear Current (mA)
Use a shielded twisted pair with the shield grounded at the signal source for connecting mA source.
Connect common (-) to terminal T3 and the signal (+) to terminal T2. Also
short
terminals T1 & T2.
Refer
Figure 1.6.
Figure 1.6
71 72 73 74 75 76 77 78
C
NO
C
NO
C
NO
C
NO
RLY-1
RLY-2
RLY-3
RLY-4
Alarm Outputs
AI-1
AI-3
AI-5
AI-7
AI-9
AI-11
AI-13
AI-15
AI-4
AI-6
AI-8
AI-10
AI-12
AI-14
AI-16
1
2
3
4
5
6
7
8
9
10
11 12 13 14 15 16 17 18 19 20
21 22 23 24 25 26 27 28 29 30
31 32
AI-2
35 36 37 38 39 40 41 42 43 44
45 46 47 48 49 50 51 52 53 54
55 56 57 58 59 60 61 62 63 64
65 66 67 68
+
-
RS485
OUT
69 70
L
N
Supply
85~264VAC
33 34
+
-
RS485
IN
AI - X
RTD
TC
V/mV
mA
Figure 1.2(b) : 16 Channel
