WIRING CONNECTIONS
All conductors should meet
voltage and current ratings for
each terminal. Also, cabling
should conform to appropriate
standards of good installation,
local codes and regulations. It
is recommended that power
supplied to the unit be
protected by a fuse or circuit
breaker. When wiring the unit,
use the numbers on the label to
identify the position number
with the proper function. Strip
the wire, leaving approximately
1/4" (6 mm) of bare wire
exposed (stranded wire should
be tinned with solder). Insert
the wire into the terminal, and
tighten the screw until the wire
is clamped tightly.
INPUT AND POWER/OUTPUT CONNECTIONS
INPUT
When connecting the RTD or resistance device, be certain that the
connections are clean and tight. Attach the device to terminals #2 and #3. Install
a copper sense lead of the same gauge as those used to connect the device.
Attach one end of the wire at the probe where the lead connected to terminal #2
is attached and the other end to terminal #1. This configuration will provide
complete lead wire compensation. If a sense wire is not utilized, then Terminal
#1 should be shorted to terminal #2. To avoid errors due to lead wire resistance,
field calibration should be performed with a series resistance equal to the
total lead resistance in the system. Always refer to the probe manufacturer’s
recommendations for mounting, temperature range, shielding, etc.
POWER/OUTPUT
The unit has the power and current output sharing the same two wires (loop-
powered). Connect DC power to terminals #4 and #5, observing the correct
polarity, with a current meter/indicator connected in between so that the output
current can be monitored. Be certain that the DC power is relatively “clean”
and within the 12 to 42 VDC range at the terminals. The current meter voltage
drop must be included in the power supply considerations.
DIP SWITCH SETTING DESCRIPTIONS
Range switch settings (ON = 1 OFF = 0)
FACTORY SETTINGS
The unit is shipped from the factory calibrated for a 4 to 20 mA output using
a type 385 RTD in range 0. The IRMA should be calibrated by the operator for
the application environment it will be used in. If the unit is not recalibrated by
the operator, the following table lists the temperature ranges for each RTD type.
SWITCH
DESCRIPTION
1
OUTPUT CAL
Output Calibration
2
FIELD CAL
Field Calibration
3
BASIC CAL
Basic Calibration
4
385/392
Select RTD alpha - 0.00392 (ON) /
0.00385 (OFF)
5
OPEN SEN DN/UP
Open Sensor Detection -
Upscale (ON) / Downscale (OFF)
6
RTD/OHMS
Select Input Type -
Ohms (ON) / RTD (OFF)
7
8
RANGE
Sensor Range - 2 switch
combination setting
DIP SWITCH
RANGE
7
8
0
0
0
1
0
1
2
1
0
3
1
1
2
1
3
RTD
S
-
+
-
RTD
+
1
S
2
3
RTD
1
S
2
+
3
-
3-WIRE RTD
4-WIRE RTD
N.C.
2-WIRE RTD
150
C to 595
C
0
392
150
C to 606
C
0
385
TEMPERATURE RANGE
RANGE
TYPE
Current Display
Indicator or
Power Supply
12 to 42 VDC
4 to 20 mA
±
A
OUTPUT
POWER/
+
4
5
-
6
1
2
3
Monitoring
Instrument
RTD
S
+
-
M2160B
IRMA
3
AUDIN - 8, avenue de la malle - 51370 Saint Brice Courcelles - Tel : 03.26.04.20.21 - Fax : 03.26.04.28.20 - Web : http: www.audin.fr - Email : [email protected]
