4.4 CONNECTION AND WIRING
The following connections for outputs and inputs are provided at the rear
of the controller housing:
4.4.1 Mains (Line) Input
The controller is supplied to operate on 24V(20-32VAC/VDV) or 90-264VAC.
Check that the installation mains voltage corresponds to that indicated on
the product label before connecting power to the controllers.
4.4.3 PT100 Ohm RTD Input
RTD connection are shown in Figure 4.6, with the compensating lead
connected to terminal 14. For two-wire RTD inputs, terminals 13 and 14
should be linked. The three-wire RTD offers the capability of lead resistance
compensation provided that the three leads should be of same gauge and
equal length.
4.4.4 DC Linear Input
DC linear voltage and linear current connections are shown in Figure 4.7
and Figure 4.8.
This equipment is designed for installation in an enclosure which
provides adequate protection against electric shock. The enclosure must
be connected to earth ground.
Local requirements regarding electrical installation should be regidly
observed. Consideration should be given to the prevention of unauthorised
personnel from gaining access to the power terminations.
4.4.2 Thermocouple Input
Thermocouple input connections are shown in Figure 4.5. The correct
type of thermocouple extension lead-wire or compensating cable must be
used for the entire distance between the controller and the thermocouple,
ensuring that the correct polarity is observed throughout. Joints in the
cable should be avoided, if possible.
The colour codes used on the thermocouple extension leads are shown in
Table 4.1.
4.4.5 Relay Output Direct Drive
Figure 4.9 shows connections using the internal relay to drive a small load.
The current does not exceed 3 amperes.
Fig. 4.4 Mains (Line) Supply Connections
TABLE 4.1 THERMOCOUPLE CABLE COLOUR CODES
Thermocouple
Type
Cable
Material
British
BS
American
ASTM
German
DIN
French
NFE
T
Copper
Constantan
+ white
- blue
* blue
+ blue
- red
* blue
+ red
- brown
* brown
+ yellow
- blue
* blue
J
Iron / Constantan
+ yellow
- blue
* black
+ white
- red
* black
+ red
- blue
* blue
+ yellow
- black
* black
K
Nickel Chromium
Nickel
Aluminium
+ brown
- blue
* red
+ yellow
- red
* yellow
+ red
- green
* green
+ yellow
- purple
* yellow
R
S
13% Copper
10% Copper
Nickel
+ white
- blue
* green
+ black
- red
* green
+ red
- white
* white
+ yellow
- green
* green
B
Platinum /
Rhodium
+ grey
- red
* grey
* Colour of overall sheath
Fig. 4.6 RTD Input Connections
Fig. 4.5 Thermocouple Input Connections
Fig. 4.7 Linear Voltage Input Connections
Fig. 4.8 Linear Current Input Connections
Fig. 4.9 Relay Direct Drive Connections
4.5
7.0 mm
0.18"
0.27"
~
~
2.0mm
0.08" max.
Fig. 4.2 Lead Termination
1
2
3
4
5
6
7
8
9
10
11 12
13
14
15
16
N
L
90-264 VAC
POWER IN
50/60 HZ
ALM2
OUT2
ALM1
OUT1
TX1
TX2
PTA
mV
mV
V
RTD
A
B
B
T/C
0-20mA
4-20mA
0-10V
Interface
+
+
+
V
mA
TC
Com.
Fig. 4.3 Rear Terminal Connections
+
13
14
_
13
12
14
A
PT100
B
B
14
15
+
_
0 20mA or
4 20mA
~
~
3
5
7
4
6
8
or
or
Load
120V /240V
Mains Supply
Alarm 2
/Control
Output 2
Alarm1
Output
Control
Output 1
Max. 3A
Resistive
14
16
+
_
1 5V, 0 10V
~
~
0 1V, 0 5V
~
~
Input Impedance = 100k ohm
1
2
90 264VAC or
20 32VAC / VDC
~
~
Fuse
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