Ogden ETR-9090 - Wiring Power and Sensor Inputs; Thermocouple and RTD Wiring Guide

Power Wiring:
Connect terminals as shown in Figure 4.3. The power
switch S1 and Fuse F1 are included for illustrative purpose
only. All wiring must conform to national and local electrical
Input Wiring:
Connect appropriate sensors to terminals 3, 4, or 5 as
illustrated in Figure 4.3 above. Verify that the instru-
ment is selected for the correct sensor and the correct
polarity is observed at both the sensor-end and instru-
ment-end of the cable. Do not run sensor cables in the
same conduit or wiring trough as power lines because
the low level signal is noise sensitive.
When wiring the thermocouple, check the thermocouple
and extension wire (compensating cable) to make sure
they conform to the appropriate thermocouple type
specified by the instrument. Extension wires must be
the same alloy and polarity as the thermocouple. The
total lead resistance should not exceed 100 ohms for
accurate measurements. One hundred ohms of lead
resistance will introduce a 1°F (0.5°C ) error.
For wiring 3 wire RTD (Resistance Temperature
Detector) all leads connecting the RTD to the controller
must be the same gauge and material. If the RTD is a
3 wire device, install the two common wires of the RTD
to terminals 4 and 5. If a 2 wire RTD is to be used,
install a jumper between terminals 4 and 5.
Figure 4.3 Rear Terminal Connections
1
2
3
4
5
6
7
8
9
10
F1
S1
Current.
Voltage
Control
+
–
Pulsed
Voltage
O/P
C
NO
NC
Alarm
Common
Alarm
N/O
RTD
T/C
Sensor
+
+
–
–
V
mA
V
Supply
Power
Optional
DC
+
–
codes. Refer to Figures 4.4, 4.5 and 4.6 on following
pages for sample wiring diagrams.
Thermocouple Cable
American
British German French
Type Material
ANSI
BS DIN NFE
1843 43710 18001
J
Iron/Constantan
+ white
- red
* black
+ yellow
- blue
* black
+ red
- blue
* blue
+ yellow
- black
* black
K
Chromel/Alumel
+ yellow
- red
* yellow
+ brown
- black
* red
+ red
- green
* green
+ yellow
- purple
* yellow
T
Copper
Constantan
+ white
- blue
* blue
+ blue
- red
* blue
+ red
- brown
* brown
+ yellow
- blue
* blue
R
S
Platinum/Rhodium
+ white
- blue
* green
+ black
- red
* green
+ red
- white
* white
+ yellow
- green
* green
B
Platinum/Rhodium
+ grey
- red
* grey
+ red
- grey
* grey
Table 4.1 Thermocouple Cable Color Codes
* Color of overall sheath
Chromel
®
and Alumel
®
are registered trademarks of Hoskins Mfg. Co.