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1. Description 

Trusted 40 Channel 120 Vac Digital Input FTA 

 

Issue 7 

Rockwell Automation Publication ICSTT-RM290F-EN-P 

The supply voltage to the field is fed via the 50 mA fuse. This effectively limits the current in 
the field loop. The incoming signal (digital) from the field device is fed to the digital input 
module via a resistive divider. This divides the voltage down to levels suitable for an 
analogue measurement. 

Revision E T8824 FTAs use two power resistors in series, as shown in the circuit diagram in 
Figure 2. Earlier revisions used 4x4 resistor arrays. The resistor arrays on the top half are 68 
K and the bottom resistor arrays are 1 K.   

Line monitoring is limited to voltage detection on the module. Refer to Trusted TMR 120 Vac 
Digital Input Module 40 Channel, publication 

ICSTT-RM450

 (PD-T8424) for details. 

The cable linking the 40 channels on the input module to the FTA is terminated at five 10-
way connectors (SK1 to SK5). The input signals from the field (40-off) are connected by 2-
wire arrangements terminated on 5-off 16-way terminal blocks. 

 

Содержание Trusted T8424

Страница 1: ...nput Field Termination Assembly FTA T8824 is designed to act as the main interface between a field device generating a digital signal and the Trusted TMR 120 Vac Digital Input Module T8424 Features 40...

Страница 2: ...Trusted ICSTT RM290F EN P Rockwell Automation Publication ICSTT RM290F EN P Issue 7 Page intentionally left blank...

Страница 3: ...r to your own local or supplied system safety manual installation and operator maintenance manuals REVISION AND UPDATING POLICY This document is based on information available at the time of its publi...

Страница 4: ...If you do not have an account then you can create one using the Sign Up link at the top right of the web page DOCUMENTATION FEEDBACK Your comments help us to write better user documentation If you dis...

Страница 5: ...at can cause an explosion in a hazardous environment which can cause injury or death property damage or economic loss ATTENTION Identifies information about practices or circumstances that can cause i...

Страница 6: ...bles ou quivalente MAINTENANCE Maintenance must be carried out only by qualified personnel Failure to follow these instructions may result in personal injury CAUTION RADIO FREQUENCY INTERFERENCE Most...

Страница 7: ...typographical errors and also standardise the Relative Humidity Range and Operating Temperature statements in the Specification Section 6 Aug 17 Figure 2 Single Channel Schematic and Voltage details i...

Страница 8: ...PREFACE Trusted 40 Channel 120 Vac Digital Input FTA vi Issue 7 Rockwell Automation Publication ICSTT RM290F EN P Page intentionally left blank...

Страница 9: ...on 7 4 Cable Capacitance 9 5 Assembly Pinout Connections 11 5 1 AC Supply TB1 Connections 11 5 2 Field TB2 TB5 Connections 11 5 3 Field TB6 TB9 Connections 12 5 4 Field TB10 TB13 Connections 13 5 5 Fi...

Страница 10: ...Table of Contents Trusted 40 Channel 120 Vac Digital Input FTA 2 Issue 7 Rockwell Automation Publication ICSTT RM290F EN P Page intentionally left blank...

Страница 11: ...Digital Input FTA T8824 provides termination for a maximum of 40 input channels from various types of field devices which generate a digital input Figure 2 below shows the configuration of a single ch...

Страница 12: ...n E T8824 FTAs use two power resistors in series as shown in the circuit diagram in Figure 2 Earlier revisions used 4x4 resistor arrays The resistor arrays on the top half are 68 K and the bottom resi...

Страница 13: ...Automation Publication ICSTT RM290F EN P Issue 7 5 2 Installation Trusted 40 Channel 120 Vac Digital Input FTA T8824 is designed to be mounted on either of the TS32 or TS35 DIN rails in the horizontal...

Страница 14: ...2 Installation Trusted 40 Channel 120 Vac Digital Input FTA 6 Issue 7 Rockwell Automation Publication ICSTT RM290F EN P Page intentionally left blank...

Страница 15: ...l Input FTA 3 Associated Cable Selection Rockwell Automation Publication ICSTT RM290F EN P Issue 7 7 3 Associated Cable Selection Refer to the product descriptions detailed below ICSTT RM311 PD TC200...

Страница 16: ...3 Associated Cable Selection Trusted 40 Channel 120 Vac Digital Input FTA 8 Issue 7 Rockwell Automation Publication ICSTT RM290F EN P Page intentionally left blank...

Страница 17: ...r loop resistance which reduces the capacitive noise and increases the available loop length The table below shows some estimated maximum lengths for different cables and mains supplies Practical dist...

Страница 18: ...4 Cable Capacitance Trusted 40 Channel 120 Vac Digital Input FTA 10 Issue 7 Rockwell Automation Publication ICSTT RM290F EN P Page intentionally left blank...

Страница 19: ...pply TB1 Connections Pin Service 1 120 Vac Live 2 120 Vac Live 3 120 Vac Neutral 4 120 Vac Neutral Table 2 AC Supply TB1 Connections Figure 4 AC Supply TB1 Connections 5 2 Field TB2 TB5 Connections Pi...

Страница 20: ...7 Channel 7 2 Channel 8 Channel 8 Table 3 Field TB2 TB5 Connections Figure 5 Field TB2 TB5 Connections 5 3 Field TB6 TB9 Connections Pin Loop Power terminal Signal terminal TB6 1 Channel 9 Channel 9 2...

Страница 21: ...9 2 Channel 20 Channel 20 TB12 1 Channel 21 Channel 21 2 Channel 22 Channel 22 TB13 1 Channel 23 Channel 23 2 Channel 24 Channel 24 Table 5 Field TB10 TB13 Connections 5 5 Field TB14 TB17 Connections...

Страница 22: ...1 Channel 33 Channel 33 2 Channel 34 Channel 34 TB19 3 Channel 35 Channel 35 4 Channel 36 Channel 36 TB20 5 Channel 37 Channel 37 6 Channel 38 Channel 38 TB21 7 Channel 39 Channel 39 8 Channel 40 Chan...

Страница 23: ...N P Issue 7 15 5 8 SK2 Connections Pin Service 1 0 V 2 Channel 9 3 Channel 10 4 Channel 11 5 Channel 12 6 Channel 13 7 Channel 14 8 Channel 15 9 Channel 16 10 Not used Table 9 SK2 Connections 5 9 SK3...

Страница 24: ...P Pin Service 9 Channel 24 10 Not used Table 10 SK3 Connections 5 10 SK4 Connections Pin Service 1 0 V 2 Channel 25 3 Channel 26 4 Channel 27 5 Channel 28 6 Channel 29 7 Channel 30 8 Channel 31 9 Chan...

Страница 25: ...120 Vac Digital Input FTA 5 Assembly Pinout Connections Rockwell Automation Publication ICSTT RM290F EN P Issue 7 17 Pin Service 6 Channel 37 7 Channel 38 8 Channel 39 9 Channel 40 10 Not used Table...

Страница 26: ...5 Assembly Pinout Connections Trusted 40 Channel 120 Vac Digital Input FTA 18 Issue 7 Rockwell Automation Publication ICSTT RM290F EN P Page intentionally left blank...

Страница 27: ...n provided in T8424 Module only Maximum Current Field Supply 5 4 mA per channel 120 Vac 6 7 mA per channel 150 Vac Fusing 50 mA fuse for each channel field voltage supply Operating Temperature 0 C to...

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