Specifications

Publication 1747-SG001E-EN-E - February 2013
Select SLC 500 I/O Modules 25
Module update time is dependent on the number of channels enabled and the filter
frequency, as illustrated in the table below.
Temperature Modules
SLC 500 Thermocouple/mV Input Modules
All modules interface to thermocouple types J, K, T, E, R, S, B, and N, and also accept
millivolt signals that standard analog modules are not able to detect. The 1746-INT4
module also interfaces with thermocouple types C and D.
All modules provide fully-integrated cold-junction compensation (CJC) to retain
thermocouple input signal accuracy, a choice of input filter frequencies, as well as fault
diagnostics and status LEDs.
Note: Block transfers are required in a remote I/O configuration, using a 1747-ASB
module with a PLC.
Module Update Times for 1746-NI16I and 1746-NI16V
Module Update Time
(1)
(1) Assuming all of the enabled channels have the filter frequency shown in the first column.
Filter
Frequency
16 Channels
Enabled
12 Channels
Enabled
8 Channels
Enabled
4 Channels
Enabled
6 Hz 630 ms 473 ms 314 ms 7 ms
10 Hz 380 ms 285 ms 190 ms 4 ms
20 Hz 194 ms 145 ms 96 ms 4 ms
40 Hz 100 ms 75 ms 50 ms 4 ms
60 Hz 69 ms 52 ms 34 ms 4 ms
80 Hz 54 ms 39 ms 26 ms 4 ms
100 Hz 37 ms 27 ms 18 ms 4 ms
250 Hz 18 ms 13 ms 9 ms 4 ms
Thermocouple Module Specifications
Attribute 1746-NT4 1746-NT8 1746-INT4
Backplane current (mA) @ 5V 60 mA 120 mA 110 mA
Backplane current (mA) @ 24V 40 mA 70 mA 85 mA
Number of inputs 4 plus a CJC sensor 8 plus a CJC sensor 4 plus a CJC sensor
Input type Thermocouple Types J, K, T, E, R, S, B, N
Millivolt Input Ranges ±50 mV and ±100 mV
Thermocouple Types J, K, T, E, R, S, B, N, C, D
Millivolt Input Ranges ±50 mV and ±100 mV
Filter frequency 10 Hz, 50 Hz, 60 Hz, 250 Hz low pass digital filter corner frequency of 8 Hz
Input step response
(95% of final value)
50 ms @ 60 Hz 80 ms @ 60 Hz 600 ms @ 8 Hz
Temperature units °C or °F