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Detcon 880A-N1R Operator's Installation And Instruction Manual

Plc graphic control system
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Model 880A-N1R
Model 880S-N1R
PLC Graphic Control System
FAULT
ALARM 3
ALARM 2
NO COMM
POWER
ALARM 1
ON / OFF
Operator's Installation and Instruction Manual
DETCON, Inc.
3200 Research Forest Dr., A-1
The Woodlands, Texas 77381
Ph.281.367.4100 / Fax 281.298.2868
www.detcon.com
May 30, 2009 • Document # 3299 • Revision 0.0

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  • Page 1 Model 880A-N1R Model 880S-N1R PLC Graphic Control System FAULT ALARM 3 ALARM 2 NO COMM POWER ALARM 1 ON / OFF Operator’s Installation and Instruction Manual DETCON, Inc. 3200 Research Forest Dr., A-1 The Woodlands, Texas 77381 Ph.281.367.4100 / Fax 281.298.2868 www.detcon.com...
  • Page 2 880-N1R Page intentionally blank 880-N1R Instruction Manual...

  • Page 3: Table Of Contents

    880-N1R Table of Contents Introduction .............................1 Serial Systems (RS-485) ........................1 Analog Systems (4-20mA sensors) ...................... 2 System Configuration ..........................3 Configuration............................3 Touch Panel Graphic Display....................... 3 Programmable Logic Controller......................4 Isolated Network Adapter ........................4 Specifications ............................6 Installation ...............................7 Installing I/O Modules..........................
  • Page 4 Figure 45 Four repeater Data Bus ........................36 Figure 46 wire length vs. data speed ........................36 Shipping Address: 3200 A-1 Research Forest Dr., The Woodlands Texas 77381 Mailing Address: P.O. Box 8067, The Woodlands Texas 77387-8067 www.detcon.com Phone: 888.367.4286, 281.367.4100 • Fax: 281.292.2860 • • sales@detcon.com...

  • Page 5: Introduction

    1.0 Introduction The standard Detcon Model 880 is a PLC based graphic control system specifically designed to serve as a host monitoring and control system for networks of gas detection sensors as well as a wide range of other field devices.

  • Page 6: Analog Systems (4-20Ma Sensors)

    The signal outputs from multiple sensors provide the user with various options for integrating the Model 880 Graphic Control System. One method of integration is accomplished by using 4-20mA signal output gas sensors with Detcon DA4 Modules (Figure 2). The DA4 Module receives an analog 4-20mA signal corresponding to the range of detection then changes it to Modbus™...

  • Page 7: System Configuration

    Three programmable “Banks” of Alarms are designed to give the user the ability to set up three “Zones” of Alarm 1, Alarm 2, Alarm 3 and Fault conditions. Through the use of the Detcon RL4 Modules, each alarm can provide multiple sets of contacts: Common, Normally Open, and Normally Closed for customer annunciator connections.

  • Page 8: Programmable Logic Controller

    880-N1R The touch panel acts as a master interface to the internally located PLC. As such, the touch panel polls the PLC, which, in turn, polls the field devices for information. A wand is used on the screen to operate system controls and/or move to additional screens.

  • Page 9: Figure 5 Isolated Network Adapter

    880-N1R Switch Settings: S21 - ON (1) 5V BIAS - ON (1) 0V BIAS - ON (1) 1/2 DPX - ON (1) 1/2 DPX - ON (1) All other switces should be set to OFF (0). Figure 5 Isolated Network Adapter Touch Screen Display TOP VIEW (Top Removed)

  • Page 10: Specifications

    880-N1R 2.5 Specifications Capacity User Configurable Serial Units: Up to 32 serial devices Analog Units: Up to 72 analog inputs using the Detcon DA-4 Modules Inputs RS-485 Modbus™ RTU Outputs Primary: RS-485 Slave: RS-485 Remote Output: RS-422 User Configurable Relays via the use of Detcon RL4 Modules...

  • Page 11: Installation

    880-N1R 3.0 Installation The Detcon Model 880-N1R PLC is a 19” Rack Mount enclosure. The 880-N1R is a 19” Rack Mount Unit and should be securely mounted in a 19” Rack Mount Cabinet or other suitable 19” Rack Mount Enclosure.

  • Page 12: Unit Connections

    880-N1R RS-485 I/O Connector COMM COMM COMM COMM COMM COMM COMM COMM RELAY RELAY RELAY RELAY 4-20mA 4-20mA 4-20mA 4-20mA INPUT INPUT INPUT INPUT RS-485 and Power (Beldon Cable P/N 1502P) Figure 8 installing Din-Rail mounted modules I/O Module Addressing I/O modules must be serially addressed to establish correct communications.

  • Page 13: Figure 10 Typical Rs-485 Connections

    Figure 10 Typical RS-485 connections Analog Sensor Connections 2. For Analog Units (880A), Sensor communication is accomplished by using Detcon DA4 modules and the RS-485 Modbus™. The 4-20mA sensors are directly connected to the DA4 modules, while the DA4 modules are connected via the RS-485 Modbus™ to the 880 PLC (Figure 11). The unit provides power and Din-Rail space on the back of the unit for a maximum of 5 DA4 modules.

  • Page 14: Figure 12 Typical Rl4 Module

    880-N1R are provided on each RL4 module for associated annunciators. These connections consist of a set of terminals (Common, Normally Open, Normally Closed) for the associated relay. FAULT ALARM 3 RS-485 from 880 COMM RELAY ALARM 2 ALARM 1 Figure 12 Typical RL4 Module 4.

  • Page 15: Battery Backup - Auxiliary 24Vdc Input

    880-N1R 6. If applicable, connect a 24VDC Battery Backup or Auxiliary 24V source to the terminal blocks labeled “24VDC INPUT” (24V+ and 24V–) (Figure 15). NOTE: This input should be capable of supplying at least 5Amps at 24VDC in order for the unit to operate properly.

  • Page 16: 880 Remote Display Installation (Optional)

    880-N1R 3.5 880 Remote Display Installation (Optional) The Detcon Model 880 Remote Display enclosure is rated NEMA 4X, which is rain tight and suitable for outdoor locations in electrically non-hazardous environments. The enclosure is equipped with four (4) wall- mounting brackets for easy wall mount installations. Care should be given to prevent sharp objects from colliding with the touch screen.

  • Page 17: Figure 17 Main 880 Terminal Blocks And Connections

    880-N1R REMOTE OUTPUT Figure 17 Main 880 terminal blocks and connections 4. Connect the RS-422 Serial communications cable to the input terminal blocks inside the 880 Remote Display labeled “TERMINAL INPUT” as shown in (Figure 18). TERMINAL INPUT Figure 18 Remote RS-422 connections TXD+ TXD+ TXD-...

  • Page 18: Figure 20 Typical Input Power Connections

    880-N1R Figure 20 Typical Input Power connections Upon completion of all field wiring, apply power to the Main 880 and the 880 Remote Display. The unit will go through a brief initialization and display the “Main Screen” (Figure 28). The “AC” box on the display should be green to show that AC is attached to the unit.

  • Page 19: Setup

    880-N1R 4.0 Setup 4.1 User interface When an alphanumeric or text string is called for, the unit will display an alphanumeric keyboard for the user to input information (Figure 21). Information typed by the user will be displayed in the box just above the keyboard.

  • Page 20: Clock And Screen Adjustments

    880-N1R 4.2 Clock and Screen Adjustments Adjustments to the clock and screen are made entering the display’s Setup Screens. Only the Clock and Screen adjustments are discussed here. Changing other aspects of the Touch Panel may cause the unit to operate improperly and should not be attempted.

  • Page 21: Figure 25 Screen Settings

    880-N1R Figure 25 Screen Settings From the “Setting” Screen, select the “Adjust Clock” button to adjust the clock (Figure 26) or the “Adjust Display” button to adjust the Display Screen (Figure 27). Figure 26 Clock Adjust Screen To adjust the Time and Date use the arrow keys. Once the correct time and date have been set, select “OK” to close the screen.

  • Page 22: 880 Setup

    880-N1R 4.3 880 Setup 1) From the “Main Screen” (Figure 28), enter the “System Configuration Screen” by touching the “System Configuration” box with the wand. Figure 28 Main Screen 2) The display will prompt for a password to enter the 880 “System Configuration Screen”. The default password is “1234”.

  • Page 23: Figure 30 Serial Configuration Screen

    880-N1R NOTE: The System Configuration Screens differ only slightly between the Analog and Serial units. Figure 30 Serial Configuration Screen 3) Use the wand to select the “FACILITY NAME” box. A keyboard will appear to allow input of the facility name (Figure 31).

  • Page 24: Figure 32 Inputting Numbers

    880-N1R Figure 32 Inputting numbers 5) Select the “# OF RELAYS BANK 1”, “2”, and/or “3” Box and input the number of RL4 Modules that will be attached to the unit for each “BANK” of alarms. (Maximum of 6 RL4 Modules per “BANK”). This will configure the unit for those relay Modules.

  • Page 25: Figure 33 Channel Detail Screen

    Refer to Appendix B for Hexadecimal to Decimal conversion table. Analog Sensor Addressing (880A) a) The 880A is set up for RS-485 communication with Analog Sensors via the Detcon DA4 Module(s). The DA4 Module addresses must start at 01hex and increment sequentially. I.E., the first DA4 should have address 01hex, the second 02hex, etc., continuing sequentially until the last DA4.
  • Page 26 880-N1R Continue this sequence for the third and fourth gas channels. Channel 5 would be connected to the second DA4, addressed at 02hex. A matrix table for the Model DA4 modules would look like this: 880A Ch # DA4 # DA4 Hex Address Sensor Position 01hex...

  • Page 27: Remote Display Set-Up

    880-N1R button will cause the associated Alarm to activate when the sensor value falls below the value set for that Alarm (Descending). Set Alarm’s 1, 2, and 3 to either ascending or descending. b) When activated (blue), the ‘LAT’ button will cause the associated Alarm to be “Latching” and will not allow that Alarm to reset until the cause is cleared or removed and the Alarm is reset with the reset button.
  • Page 28 880-N1R Select “Gas Type”, and input the gas type of the sensor. (i.e., H2S, LEL, CO2, etc.) Up to 10 characters maximum. The “Gas Type” entered here must match the “Gas Type” entered at the Main 880. c) The Range of the sensor is transferred by the Main 880 and should not be changed in the Remote Display.

  • Page 29: System Operation

    “Channel X Details Screen”. This screen will provide more information on the selected channel. Near the top left of the screen, just below the Detcon Logo, there will be 2 to 9 selection buttons (Labeled “1- 8,” “9-16,” “17-24,” etc.) dependent on the total number of channels set up in the “System Configuration Screen.”...

  • Page 30: Channel X Details Screen

    880-N1R will open the associated channels detail screen (Section 5.3). Figure 34 The Main Screen A row of boxes is located at the bottom of the screen. The second box displays the time and date. The “AC” box is green when the unit is running on applied AC or, if applicable, the Auxiliary 24VDC Input. “USB Out”...

  • Page 31: Alarm History Screen

    880-N1R Figure 35 Channel Details Screen 5.4 Alarm History Screen When alarms are initiated, the unit stores information about these alarms into memory. If a USB Drive is installed in the back of the display, this information is written onto the drive for permanent storage (USB Drive sold separately).

  • Page 32: Trouble-Shooting

    880-N1R 6.0 Trouble-shooting 6.1 Sensor Faults The unit is set up such that Sensor faults will set Fault alarms associated with that sensor. If a sensor goes into a fault condition, that channel will flag a fault. From the “Main Screen” each channel can be quickly viewed to see which channel is causing the fault.
  • Page 33 880-N1R Slave Master Difference ID 01 Results similar to those ID 02 shown here should be ID 03 ID 04 expected. In this example ID 05 ID 06 slave device 03 and 0B ID 07 would need to be changed. ID 08 ID 09 ID 0A...

  • Page 34: Spare Parts

    Suite A-1, The Woodlands, Texas 77381 for necessary repairs. Detcon Inc., as manufacturer, warrants each new PLC Graphic Control Unit to be free from defects in material and workmanship under intended normal use for a period of one year. The warranty period begins on the date of shipment to the original purchaser and ends one year thereafter.

  • Page 35: Appendix A

    A true daisy-chain has direct wiring between devices with no minor branches. Detcon equipment contains four wiring terminals for RS-485 connections. Two for A(+) and two for B(-). All connections should be made directly to these. Figure 3.1 shows an electrical representation of a simple RS- 485 bus with 4 transceiver chips.

  • Page 36: Figure 38 Correct And Incorrect Wiring Schemes

    880-N1R The characteristic impedance of the cable must be between 100 to 120 ohms. Twisted pair is used because if the cable does run near a noise source both conductors will pick up the same amount of noise; therefore, effectively canceling it out. Incorrect Wiring Schemes Among the biggest problems with an RS-485 bus is the use of incorrect wiring schemes mixed with improper or no line termination.

  • Page 37: Figure 39 Recommended Rs-485 Communications Set-Up

    880-N1R Figure 39 Recommended RS-485 communications set-up Grounding Another problem that can occur with RS-485 is incorrect grounding. Neither one of the two conductors in the cable is ground. Both of the conductors are supplying a current to maintain a voltage level relative to an external reference.

  • Page 38: Figure 40 Unbalanced Data Bus

    Be sure to check the equipment being installed. Some manufacturers include a built-in terminating resistor that can be selected by a jumper or dipswitch. Detcon Model 880 has such a jumper located on the FA-isonet card. The jumper is labeled “120 ohm Term.”...

  • Page 39: Figure 43 Daisy Chain Wiring Diagram

    880-N1R Device Hook-Up Installation should begin by deciding where devices will be located and how the connections between devices and the master will be established. The ideal scenario would look like Figure 43. The example shows the 880 Controller connected to 11 slave devices using a daisy-chain wiring scheme. This would require 2 different twisted pair cables, one pair for power, and the other for the RS-485 data bus.

  • Page 40: Figure 45 Four Repeater Data Bus

    This configuration isolates all of the t-tap stubs. This configuration should function properly as long as the wire type and proper distances are observed. The following chart shows an approximation of wire length vs. data speed. Detcon operates its equipment at 19,200bps (baud) and lower.

  • Page 41: Appendix B

    880-N1R Appendix B Hexadecimal Table SW1 SW2 SW1 SW2 SW1 SW2 SW1 SW2 SW1 SW2 SW1 SW2 none 880-N1R Instruction Manual Rev. 0.0 Page 37 of 38...

  • Page 42: Appendix C

    2. 880-N1R Component Layout 3. 880-N1R Wiring Diagram Shipping Address: 3200 A-1 Research Forest Dr., The Woodlands Texas 77381 Mailing Address: P.O. Box 8067, The Woodlands Texas 77387-8067 www.detcon.com Phone: 888.367.4286, 281.367.4100 • Fax: 281.292.2860 • • sales@detcon.com 880-N1R Instruction Manual Rev.

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880s-n1r

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