Despatch MIC 1162 Bedienungsanleitung
REV. 4-99
E-89
P.N. 136107
MIC 1162
1/16 DIN HIGH/LOW LIMIT CONTROLLER
REFERENCE MANUAL
Copyright © 1999 by Despatch Industries
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TABLE OF CONTENTS
TABLE OF CONTENTS................................................................................................... i
SECTION 1: PRODUCT DESCRIPTION....................................................................... 1
1.1 General.................................................................................................................1
1.2 Displays................................................................................................................1
1.3 Alarms ..................................................................................................................1
1.4 Process Variable/Setpoint Value Retransmission Output .................................... 2
SECTION 2: INSTALLATION AND WIRING..................................................................3
2.1 General Information.............................................................................................. 3
2.2 Wiring Guidelines.................................................................................................5
2.2.1 Installation Considerations.............................................................................5
2.2.2 AC Power Wiring ...........................................................................................6
2.2.3 Wire Isolation.................................................................................................6
2.2.4 Use Of Shielded Cable ..................................................................................7
2.2.5 Noise Suppression At The Source.................................................................7
2.3 Sensor Placement (Thermocouple or RTD) ......................................................... 9
2.4 Input Connections...............................................................................................10
2.5 Output Connections............................................................................................ 13
SECTION 3: OPERATION........................................................................................... 15
3.1 Power Up Procedure ..........................................................................................15
3.2 Keypad Operation...............................................................................................15
3.3 Displays..............................................................................................................16
3.3.1 Alarm Status Display....................................................................................16
3.3.2 Over-Range/Under-Range Display.............................................................. 16
3.4 Front Panel Indicators........................................................................................ 17
3.5 Exceeding Limit Setpoint....................................................................................17
3.6 Annunciator ........................................................................................................18
3.7 Remote Reset (Optional)....................................................................................18
SECTION 4: CONTROL MODE................................................................................... 19
SECTION 5: SETPOINT CHANGE MODE...................................................................21
SECTION 6: CONFIGURATION.................................................................................. 23
SECTION 7: SET-UP MODE........................................................................................27
SECTION 8: ENABLE MODE........................................................................................ 31
SECTION 9: CALIBRATION ........................................................................................ 33
APPENDIX A: BOARD LAYOUT - JUMPER POSITIONING.........................................37
APPENDIX B: HARDWARE DEFINITION CODE .........................................................41
APPENDIX C: INPUT RANGE CODES......................................................................... 43
APPENDIX D: SPECIFICATIONS.................................................................................45
APPENDIX E: ORDER MATRIX....................................................................................49
APPENDIX F: SOFTWARE REFERENCE SHEET....................................................... 51
Despatch Product Warranty..........................................................................................53
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1
SECTION 1: PRODUCT DESCRIPTION
1.1 General
This instrument is a microprocessor based single loop controller capable of measuring
and displaying temperature, pressure, flow, and level from a variety of inputs. The
control is configurable to be either high-limit, low-limit, or both types.
Control functions, alarm settings and other parameters are easily entered through the
front keypad. E2Technology (100 year life) protects against data loss during AC power
outages.
The input is user configurable to directly connect to either thermocouple, RTD, mVDC,
VDC or mADC inputs. The instrument can operate from either a 90-264 VAC, 50/60 HZ
power supply, or optional 24V AC/DC power supply.
1.2 Displays
Each instrument is provided with dual displays and status indicators as shown in Figure
1 -1. Typically, the upper display displays the value of the process variable, while the
lower display displays the setpoint value. Alternate displays can be selected in the
Setup Mode.
1.3 Alarms
Alarm indication is standard on all instruments. Up to two alarm outputs are optional.
Alarm type may be set as Process Direct or Reverse (high or low), Logical Combination
of the two alarms, Annunciator Direct or Reverse, High Limit, or Low Limit. Alarm
status is indicated by LED.
2
FIGURE 1-1 Keys and Indicators
1.4 Process Variable/Setpoint Value Retransmission Output
If the instrument is specified with this option, this output may be scaled over
any desired range and re-transmitted, through optional Output 3.
3
SECTION 2: INSTALLATION AND WIRING
2.1 General Information
Electrical code requirements and safety standards should be observed and installation
performed by qualified personnel.
The electronic components of the instrument may be removed from the housing during
installation. To remove the components, grip the side edges of the front panel and pull
the instrument forward. During re-installation, the vertically mounted circuit boards
should be properly aligned in the housing.
Ensure that the instrument is correctly orientated. A stop will operate if an attempt is
made to insert the instrument incorrectly.
Recommended panel opening sizes are illustrated in Figure 2-1. After the opening is
properly cut, insert the instrument into the panel opening. Ensure that the panel gasket
is not distorted and that the instrument is positioned squarely against the panel. Slide
the mounting clamp into place on the instrument and push it forward until it is firmly in
contact with the rear face of the mounting panel.
Note: The mounting clamp tongues may engage either on the sides or the
top/bottom of the instrument housing. Therefore when installing several
instruments side-by-side in one cut-out, use the ratchets on the top/bottom
faces.
4
FIGURE 2-1
Panel Cut-Out Dimensions
FIGURE 2-2
Main Dimensions
5
FIGURE 2-3
Panel Mounting the Controller
2.2 Wiring Guidelines
Electrical noise is a phenomenon typical of industrial environments. The following are
guidelines that must be followed to minimize the effect of noise upon any
instrumentation.
2.2.1 Installation Considerations
Listed below are some of the common sources of electrical noise in the
industrial environment:
•Ignition Transformers
•Arc Welders
•Mechanical contact relay(s)
•Solenoids
Before using any instrument near the device listed, the instructions below
should be followed:
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1. If the instrument is to be mounted in the same panel as any of the listed devices,
separate them by the largest distance possible. For maximum electrical noise
reduction, the noise generating devices should be mounted in a separate enclosure.
2. If possible, eliminate mechanical contact relay(s) and replace with solid state relays.
If a mechanical relay being powered by an instrument output device cannot be
replaced, a solid state relay can be used to isolate the instrument.
3. A separate isolation transformer to feed only instrumentation should be considered.
The transformer can isolate the instrument from noise found on the AC power input.
4. If the instrument is being installed on existing equipment, the wiring in the area
should be checked to insure that good wiring practices have been followed.
2.2.2 AC Power Wiring
Neutral (For 115 VAC)
It is good practice to assure that the AC neutral is at or near ground potential. To verify
this, a voltmeter check between neutral and ground should be done. On the AC range,
the reading should not be more than 50 millivolts. If it is greater than this amount, the
secondary of this AC transformer supplying the instrument should be checked by an
electrician. A proper neutral will help ensure maximum performance from the
instrument.
2.2.3 Wire Isolation
Three voltage levels of input and output wiring may be used with the unit:
•Analog input or output (i.e. thermocouple, RTD, VDC, mVDC, or mADC)
•SPDT Relays
•AC power
The only wires that should run together are those of the same category. If they need to
be run parallel with any of the other lines, maintain a minimum 6 inch space between
the wires. If wires must cross each other, do so at 90 degrees. This will minimize the
contact with each other and reduces "cross talk". "Cross Talk" is due to the EMF
(Electro-Magnetic Flux) emitted by a wire as current passes through it. This EMF can
be picked up by other wires running in the same bundle or conduit.
In applications where a High Voltage Transformer is used (i.e. ignition systems) the
secondary of the transformer should be isolated from all other cables.
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