The Interface Solution Experts
5
TMZ
PC-Programmable MODBUS
Temperature Transmitter
Specifications
Input Accuracy:
See Table 4
Overall Accuracy:
The
overall accuracy of the
unit is the input accuracy.
It includes the combined
effects of linearity,
hysteresis, repeatability and
adjustment resolution. It
does not include ambient
temperature effect. For
T/C input, add the RJC
error.
Cold Junction
Compensation Accuracy
(T/C Inputs Only):
±0.45°C
Stability:
See Table 1
Response Time:
INPUT
UPDATE TIME: 128msec;
MODBUS POLLING TIME:
Dependent upon how fast
and how often a MODBUS
master requests data
Isolation:
Standard unit,
1000Vrms between case,
input. 1500Vrms between
power and input; WITH
-RF OPTION, 500Vrms
between case, input and
power.
Power Consumption:
1W max.
Input Impedance:
T/C and mV inputs,
40Mohms, nominal
Input Over-Range
Protection:
±5Vdc
Excitation Current (RTD
and Ohm Inputs Only):
250µA, ±10%
Type:
Standard
MODBUS RTU protocol
interface over RS-485
(parameters as specified
in U.S. Standard EIA-
RS485)
Address Range:
Configurable from 1 to
247. Unit will assume a
MODBUS address of 01
by default.
Baud Rates:
Interface
supports the following:
300, 600, 1200, 2400,
4800, 9600, 19.2k and
38.4k
Character Format:
One
start bit, 8 data bits and
one stop bit
LED Type:
INPUT LED:
Dual color LED indicates
input failure
READY LED: Green LED
indicates unit is operating
properly
Performance
Indicators
Ambient
Conditions
Weight
Performance
(continued)
Specifications and information subject to change without notice.
Communications
Operating & Storage
Range:
-40°C to +85°C
(-40°F to +185°F)
Effect of Ambient
Temperature on Cold
Junction Compensation
(T/C Inputs Only):
±0.005°C per °C change
of ambient temperature
Relative Humidity:
0-95%, non-condensing
Ambient Temperature
Effect:
See Table 3
RFI/EMI Immunity
(Standard Unit):
10V/m@20-1000MHz,
1kHz when tested
according to
IEC1000-4-3-1995
WITH -RF OPTION,
30V/m@20-1000MHz,
1kHz AM when tested
according to
IEC1000-4-3-1995
Noise Rejection:
Common mode,
100dB@50/60Hz; Normal
mode, Refer to Table 2
290 g (10.2 oz)
Table 1.
Long-Term Stability
RTD, Ohm & Pot Inputs
Input-to-Output (Years)
Stability
(% of maximum
span)
1
3
5
0.09
0.08
0.16
0.14
0.21
0.18
T/C & mV Inputs
Table 2.
Normal Mode Rejection Ratio
150mV
80mV
250mV
1V
500mV
100mV
1V
250mV
100mV
T/C: J, K, N, C, E
T/C: T, R, S, B
Pt RTD: 100, 200, 300ohms
Pt RTD: 400, 500, 1000ohms
Ni: 120ohms
Cu: 9.03ohms
Sensor Type
Max. p-p Voltage Injection for
100dB at 50/60Hz
mV
250-1000
62.5-250
31.25-62.5
Resistance
1-4kohms
0.25-1kohms
0.125-0.25kohms
Table 3.
Ambient Temperature Effect
Input Type
*RTD
Millivolt
Ohm
0.0035°C
0.5µV + 0.005% of reading
0.0 0.005% of reading
*Accuracy of Ni672 is 0.002°C
Thermocouples
Accuracy per 1°C (1.8°F) change in Ambient
J
K
E
T
R, S
B
N
C
mV
0.00016°C + 0.005% of reading
0.0002°C + 0.005% of reading
0.00026°C + 0.005% of reading
0.0001°C + 0.005% of reading
0.00075°C + 0.005% of reading
0.0038°C + 0.005% of reading
0.0003°C + 0.005% of reading
0.00043°C + 0.005% of reading
0.5µV + 0.005% of reading
Accuracy per 1°C (1.8°F) change in Ambient
Input Type
