Spectrum Controls 1794sc-IRT8I - Manual (Page 2)

Install Guide
Publication 0100153‐01 Rev. A (1794sc‐IRT8I) December 2008
Wire Connections for the Isolated Universal
Input Module
Terminal Base Unit Wiring Connections
Channel
Number
1794-TB3G and 1794-TB3GS Terminal Base Units
Signal
Return
(R) Input +
(IN+) Input
(-) I Return
(-)
0 A-0 A-1 A-2 A-3
1 A-4 A-5 A-6 A-7
2 A-8 A-9 A-10 A-11
3 A-12 A-13 A-14 A-15
4 B-17 B-18 B-19 B-20
5 B-21 B-22 B-23 B-24
6 B-25 B-26 B-27 B-28
7 B-29 B-30 B-31 B-32
1Terminals 16, 33, and 40…45 are chassis ground.
Example of RTD/Resistance Wiring to a 1794-TB3G
Terminal Base Uni
t
Example of Thermocouple Wiring to a 1794-TB3G Terminal
Base Unit
Input Map and Configuration (EDT)
The following information is presented for experienced users only. Refer
to the user manual, publication 0300240-01, for complete information on
programming and configuring your module.
Input Map (Read)
Usage (16 bit words):
I:0 Channel 0 input Data.
I:1 Channel 1 input Data.
I:2 Channel 2 input Data.
I:3 Channel 3 input Data.
I:4 Channel 4 input Data.
I:5 Channel 5 input Data.
I:6 Channel 6 input Data.
I:7 Channel 7 input Data.
15
14 13 12 11 10 9 8 7 6 5 4 3 2 1 0
S:0 OverRange (CH0/Bit 8, CH1/Bit 9, …) UnderRange (CH0/Bit 0, CH1/Bit 1, …)
S:1 User HI Alarms (CH0/Bit8, CH1/Bit9, …) User LO Alarms(CH0/Bit0, CH1/Bit1, …)
S:2 Reserved CJC
Alarm
Broken Input Alarms
S:3 Reserved Diagnostics
CJC Alarm
Bit 9 Bit 8 CJC Alarm:
0 0 No Errors
0 1 CJC1 is broken.
1 0 CJC2 is broken.
1 1 Both CJC1 and CJC2 are broken.
EDT Configuration Table
Usage (16 bit words):
15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0
C:0 R 1 R 1 F7 F6 F5 F4 R 1 R 1 R 1 F3 F2 F1 F0 R 1
C:1 °F
Ch0
DC
Ch0 BIM
Ch0
R 1 Data Format
Ch0 Input Filter
Ch0 Input Type CH0
C:2 °F
Ch1
DC
Ch1 BIM
Ch1
R 1 Data Format
Ch1 Input Filter
Ch1 Input Type CH1
C:3 °F
Ch2
DC
Ch2 BIM
Ch2
R 1 Data Format
Ch2 Input Filter
Ch2 Input Type CH2
C:4 °F
Ch3
DC
Ch3 BIM
Ch3
R 1
Data Format
Ch3 Input Filter
Ch3 Input Type CH3
C:5 °F
Ch4
DC
Ch4 BIM
Ch4
R 1 Data Format
Ch4 Input Filter
Ch4 Input Type CH4
C:6 °F
Ch5
DC
Ch5 BIM
Ch5
R 1 Data Format
Ch5 Input Filter
Ch5 Input Type CH5
C:7 °F
Ch6
DC
Ch6 BIM
Ch6
R 1 Data Format
Ch6 Input Filter
Ch6 Input Type CH6
C:8 °F
Ch7
DC
Ch7 BIM
Ch7
R 1
Data Format
Ch7 Input Filter
Ch7 Input Type CH7
C:9 CH0 User Low Alarm Threshold
C:10 CH0 User High Alarm Threshold
C:11 CH0 User Alarm Deadband
C:12 CH1 User Low Alarm Threshold
C:13 CH1 User High Alarm Threshold
C:14 CH1 User Alarm Deadband
C:15 CH2 User Low Alarm Threshold
C:16 CH2 User High Alarm Threshold
C:17 CH2 User Alarm Deadband
C:18 CH3 User Low Alarm Threshold
C:19 CH3 User High Alarm Threshold
C:20 CH3 User Alarm Deadband
C:21 CH4 User Low Alarm Threshold
C:22 CH4 User High Alarm Threshold
C:23 CH4 User Alarm Deadband
C:24 CH5 User Low Alarm Threshold
C:25 CH5 User High Alarm Threshold
C:26 CH5 User Alarm Deadband
C:27 CH6 User Low Alarm Threshold
C:28 CH6 User High Alarm Threshold
C:29 CH6 User Alarm Deadband
C:30 CH7 User Low Alarm Threshold
C:31 CH7 User High Alarm Threshold
C:32 CH7 User Alarm Deadband
1 Reserved for future expansion
F0 through F7 (Channel n Fault Mode)
State Function
0 Disabled
1
Broken input testing enabled
Input Type
Bit 4 Bit 3 Bit 2 Bit 1 Bit 0 Range:
0 0 0 0 0 B Type Thermocouple
0 0 0 0 1 C Type Thermocouple
0 0 0 1 0 E Type Thermocouple
0 0 0 1 1 J Type Thermocouple
0 0 1 0 0 K Type Thermocouple
0 0 1 0 1 N Type Thermocouple
0 0 1 1 0 R Type Thermocouple
0 0 1 1 1 S Type Thermocouple
0 1 0 0 0 T Type Thermocouple
0 1 0 0 1 100 Ω Pt α 0.385
0 1 0 1 0 200 Ω Pt α 0.385
0 1 0 1 1 500 Ω Pt α 0.385
0 1 1 0 0 1000 Ω Pt α 0.385
0 1 1 0 1 100 Ω Pt α 0.3916
0 1 1 1 0 200 Ω Pt α 0.3916
0 1 1 1 1 500 Ω Pt α 0.3916
1 0 0 0 0 1000 Ω Pt α 0.3916
1 0 0 0 1 10 Ω Cu α 0.426
1 0 0 1 0 100 Ω Ni α 0.618
1 0 0 1 1 120 Ω Ni α 0.672
1 0 1 0 0 604 Ω NiFe α 0.518
1 0 1 0 1 R 0 to 150 Ω
1 0 1 1 0 R 0 to 1000 Ω
1 0 1 1 1 R 0 to 3000 Ω
1 1 0 0 0 +/- 50 mV
1 1 0 0 1 +/- 100 mV
Input Filter
Bit 7 Bit 6 Bit 5 ADC Filter:
0 0 0 4.17 Hz
0 0 1 10.0 Hz
0 1 0 16.7 Hz
0 1 1 19.6 Hz
1 0 0 62.0 Hz
1 0 1 470.0 Hz
1 1 0 *Unused
1 1 1 *Unused
Data Format
Bit 10 Bit9 Bit 8 Format:
0 0 0 Engineering Units
0 0 1 Engineering Units X10
0 1 0 Raw/Proportional Counts
0 1 1 Scaled for PID
1 0 0 Percent of Full Scale
1 0 1 1 CJC EU
1 1 0 1 CJC Scaled for PID
1 1 1 1 CJC Percent of Full Scale
BIM Ch n (Broken Input Mode Channel n)
Bit 13 Bit 12 1 Broken Input Mode:
0 0 Zero analog value on broken input.
0 1 Set analog value to Max scale on broken input.
1 0 Set analog value to Min scale on broken input.
1 1 Previous Value
DC Ch n (Disable CJC for Channel n)
State Function
0 CJCs
Enabled 1
1 CJCs Disabled 1
1 This field is only used if the input type is a
thermocouple and the format is not a CJC
format. No compensation is performed on the
thermocouple when disabled.
˚F Ch n (Temperature Units for Channel n)
State Function
0 Degrees
C
1 Degrees F
Type of Input Connect The Following
R IN+ IN‐ I Shield 1
RTD/Res 2‐wire 1 2
RTD/Res 3‐wire 0 1 2
Thermocouple 1 2
Millivolt 1 2
1 Shield can be connected to chassis ground terminals 16, 33,
and 40…45.
Input CJC Sensor
+ Chassis
Ground
‐ CJC
Tail 1
CJC1 C37 C38 C39 A1
CJC2 C‐46 C‐47 C‐48 B31
1 Terminals 37, 38, and 39, and 46, 47, and 48 are for cold junction
compensation (with 38 and 47 chassis GND). Connect the tail of CJC 1
to terminal 1 and CJC2 to terminal 31 if channels 0…3 or 0…7 are
configured for thermocouples.
The power supply in the current loop to the current inputs
(I/O) of the devices may only be an Isolated Secondary
Limited Voltage, Class 2, or Limited Voltage/Current power
supply.
RTD/Resistance
0
2
3‐wire
Thermocouple
1
2
+
‐
1
2‐wire
0
2
1
Jumper
+
mV
-
mV Source
1
2
Numbers 0, 1, 2, and 3 are wiring numbers
of the sensor used. For terminal numbers
corresponding to R, IN+, IN-, I, refer to
Terminal Base Unit Wiring Connections
below.