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Table of Contents
Summary of Contents for CTI EM2 Series
- Page 1 ENTRANCE MONITOR Installation and Operation Manual...
- Page 2 Warning Use this product only in the manner described in this manual. If the equipment is used in a manner not specified by CTI, the protection provided by the equipment may be impaired. This equipment should be installed by qualified personnel.
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Page 3: Table Of Contents
Table of Contents General description ........4 Installation ............4 Locating the entrance monitor ....4 Installation guidelines ......... 4 Wiring ............5 Operation ............10 Power-up............ 10 Operator interface ........10 Contrast ............. 10 Home screen ..........10 Alarm condition ......... 11 Status screens .......... -
Page 4: General Description
General Description Installation Locating the Entrance Monitor This manual covers the EM2-24 and EM2-120 entrance monitors. The EM2-120 includes an installed AC- The EM2 can be installed indoors or outdoors and DC power supply that allows for 120Vac input and should be installed for easy viewing and accessibility converts it to 24Vdc power for the EM2. -
Page 5: Wiring
Opening the enclosure Wiring Electrical wiring must comply with all applicable codes. The left and right hinges hold the top cover to the base. Wiring Guidelines: • Always use 3-conductor, insulated, stranded, Insert a small (0.12" (3 mm) or smaller) slotted shielded copper cable for all sensor cables. - Page 6 Stand-Alone and Feed-Through Sensor Wiring: • 4-20 mA, 261 Ohm input impedance. Applications • Refer to sensor manual for cable recommendations The EM2 terminates the gas sensor’s 4-20 mA signal, (typically 18/3 shielded cable (General Cable and re-transmits the 4-20 mA signal to another analog #C2535A or equivalent)).
- Page 7 to +24V terminal of power supply (+V) to Ground terminal of power supply (-V) to Ground terminal of power supply (-V)* to Signal terminal of sensor to +24V terminal of sensor to Ground terminal of sensor to Shield terminal of sensor to horn/strobe or other alarm device...
- Page 8 to Signal input of monitoring equipment to +24V terminal of power supply (+V) to Ground terminal of power supply (-V) to case (earth) ground of monitoring equipment* to Signal terminal of sensor to +24V terminal of sensor to Ground terminal of sensor to Shield terminal of sensor to horn/strobe or other alarm...
- Page 9 3. Repeat step 2 until you have fed through every entrance monitor in sequence. 4. On the last entrance monitor, finish by running cable to the sensor. 5. If multiple EM2's are connected in series, additional power supplies and/or heavier gauge cable may be required. Contact CTI for assistance. Example 1 Next entrance...
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Page 10: Operation
Operation 85300 Power-up Before applying power, make a final check of all wiring for continuity, shorts, grounds, etc. It is usually best to disconnect external alarms and other equipment from the EM2 entrance monitor until the initial start-up procedures are completed. Operator Interface ALARM All operator functions are performed from the pushbuttons on the front of the panel. Below is a list of the common key functions used for the LCD In some fields, the arrow keys can be held in to operations:... -
Page 11: Alarm Condition
STATUS Inactivity of the operator interface after 5 minutes will return the LCD to the Home screen. SET DELAY (SEC): RESET DLY (SEC): Alarm condition Once the signal exceeds the alarm setpoint for the Set ALARM DIR: UPSCALE Delay time, ALARM will flash on the screen and the LATCHING: alarm relay will change states. Once the signal falls below the alarm setpoint for the Reset Delay time, the FAILSAFE: ALARM message will clear and the relay will return to... -
Page 12: Top Menu Screen
STATUS TOP MENU SW VER: 1.02 TEST CONFIGURATION IN/OUT ADJUST There are four more sets of screens explained on the Top Menu screen following pages: Top Menu, Configuration, Test, and The Top Menu screen allows access to the three other In/Out mA Adjust. modes on the entrance monitor. To access the Top Menu screen, press the key. -
Page 13: Configuration Mode
CONFIGURATION CONFIGURATION GAS: BEEP: UNITS: TOP MENU: # OF DEC POINTS: AVERAGING: 4 MA: 20 MA: ALARM SET PT: DEADBAND Configuration Mode CONFIGURATION To enter Configuration mode, press the SET DELAY (SEC): keys at the same time to enter Configuration mode, or RESET DLY (SEC): select it from the Top Menu if turned On. Use the keys to scroll to each field. - Page 14 Units PRESS ESC TO EXIT Select unit of measurement. Default is PPM. AND LOSE CHANGES # of Decimal Points Select number of decimal points displayed on the LCD. Typically, a full-scale range of 100 or greater will have PRESS ENT TO EXIT 0 decimal places.
- Page 15 Deadband Failsafe The deadband or zero-blanking value prevents the Selecting On allows the relay to be energized during screen from showing values lower than the deadband normal operation. Loss of power or an alarm condition setpoint. For example, a deadband setpoint of 5 on will cause the relay to change states. Default value is a range of 0-100 ppm would only display 0 ppm until the input reaches 5 ppm.
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Page 16: Test Mode
TEST Relay Test CAL MODE: The Relay Test allows for testing of the relay output function without gassing the sensor. To test the relay RELAY TEST: output, press the key and then use the FORCE OUTPUT: arrow keys to select ALARM or OFF. Once the relay output has been verified to function as intended, TIME-OUT: 60:00... -
Page 17: In/Out Adjust
IN/OUT ADJUST In 4 mA Adjust IN 4 MA ADJ: 0.07 Adjust + or - to achieve correct zero display on the EM2 from the incoming analog signal such as a gas IN 20 MA ADJ: 1.002 detector. For example, a 0-250 ppm detector with OUT 4 MA ADJ: -0.01 a 4.00 mA signal should read 0 ppm. -
Page 18: Start-Up
Start-Up Maintenance Start-up Test All gas detection systems should be calibrated with After setup and programming is complete, it is certified calibration gas once every six months. At this recommended to perform a functionality test of the interval, all alarm functions and outputs should be unit. Refer to sensor manual for proper warm-up time tested, verified and documented. - Page 19 1) Input and Output Signal Testpoints: These testpoints provide measurements of the in/out 4-20 mA (measured 40-200 mVdc). 2) Wiring Terminal: Make sure wiring is correct and securely fastened into terminals. If the entrance monitor lid is opened and closed often, cable wires can be prone to breakage where they connect at the wire terminals.
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Page 20: Specifications
Specifications Temperature Range: -40°F to +122°F (-40°C to +50°C) Humidity Range: Power Requirements: 0% to 100% condensing EM2-24: 24 VDC, 350 mA max (not including other Sensor Inputs: connected devices). (1) 4-20 mA, 261 Ohm input impedance EM2-120: 100-240 VAC, 0.7A 50/60 Hz Analog Output: Output 24 VDC Power available for sensors and audio/ 4-20 mA (max input impedance: 700 Ohms) visual devices: Relay Outputs:... -
Page 21: Warranty
No goods shall be returned to CTI until receipt by the buyer of shipping instructions from CTI; and c) the right of CTI to require that the buyer provide proof of purchase such as the original invoice, bill of sale or packing slip to establish that the product is within the warranty period. - Page 24 CT2-DOC1-1 20200109 ctiengineering.com | 866-394-5861...
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