Raychem TraceTek TTDM-1 Скачать руководство пользователя страница 5 | Manualshive

Страница: 5 / 19

Raychem TraceTek TTDM-1 Скачать руководство пользователя страница 5

Serial Port

The TTDM module has a serial port (marked EXT COM PORT) that can be configured for
use either as an RS-232 or RS-485 transceiver. The factory default is RS-232, and is
suitable for connecting the TTDM to single devices up to 50 ft (15 m) away. The standard
configuration is RS-232 full-duplex with no hardware handshaking, which is suitable for
connection to many devices (such as a remote host PC, laptop, or modem).

The RS-232/485 port (19 on foldout) is connector J13 on the TTDM motherboard. The
pinouts for connector J13 on the TTDM motherboard are listed below, with functions for
RS-232 usage noted.

Pin

Desc.

Use

J13-5

RX/A

Receive data

J13-6

TX/B

Transmit data

J13-7

RTS

Request to send —
for hardware handshaking

J13-8

CTS

Clear to send —
for hardware handshaking

J13-9

+5V/DTR

+5V supply/DTR if
needed by modem

J13-10

GND

Supply return

Note:

For further information, see Appendix 4 - Interface Details.

Relays

TTDM has three relays:

• Service

• Leak

• Fault

Each relay provides two Form-C relay contacts, with normally open and normally closed
contacts both provided. The relays are

de-energized to indicate an alarm condition. The

diagram below shows the relay status when each is in an alarm (de-energized) state.

(For other connection options, please consult Appendix 5 - Wiring Details.)

4–20 mA

The module is equipped with an analog 4–20 mA interface. The TTDM adjusts its current
output based on whether an alarm condition exists, and (when a leak is detected) the
location of the leak. Its output can be scaled to make full use of the 4–20 mA range for
the length of sensing cable connected.

Note: The current transmitter is isolated from the sensing circuitry and therefore requires
an external 24 Vdc power supply.

The 4–20 mA output port (18 on foldout) is connector J2 on the TTDM motherboard,
with terminals as noted in the following table:

Pin

Desc.

Use

J2-11

IRTN

Current loop return

J2-12

IOUT

Current output

J2-13

+V

24 Vdc supply (required)

J2-14

+VRTN

24 Vdc common (required)

Note: More information about operation and testing is found in Appendix 4 -
Interface Details.

15 16 17

20

19

18

21 22 23

26

25

24

27 28 29

32

31

30

LEAK RELAY

SERVICE RELAY

FAULT RELAY

4

5

Connection to Other Devices

«
...
3
4
5
6
7
...
»

Содержание TraceTek TTDM-1

Страница 1: ... PCN 137021 3 97 TraceTek is a trademark of Raychem Corporation All information including illustrations is believed to be reliable Users however should independently evaluate the suitability of each product for their application Raychem makes no warranties as to the accuracy or completeness of the information and disclaims any liability regarding its use Raychem s only obligations are those in the...

Страница 2: ...to various features that may be viewed and or edited The menus are navigated with the arrow keys together with the Esc escape and Enter keys Internal View B 7 User interface board 8 4 20 mA board 9 Sensor interface board 10 Motherboard 11 Power supply board 12 Fuse 200 mA 250 V 13 Power cable terminal block 14 Ground earth stud 15 Fault relay cable plug and socket 16 Leak relay cable plug and sock...

Страница 3: ...eries sensing cables and all TT100 TT300 and TT500 series long line sensing cables TTDM can monitor up to 5000 ft 1500 m of sensing cable and can detect and locate the presence of liquid at any point along the cable The module also monitors the system for other alarm conditions Service required Fault Each event service leak or fault is recorded in an Events History with the time and date of occurr...

Страница 4: ... then signals the alarm and displays the distance to the leak The longline system includes sensing cable and circuit components leader cable jumper cables end terminations weighted lengths and branching connectors with connectors that allow components of the system to plug together The weighted length resistor simulates a 15 ft 5 m length of sensing cable Installed at the boundary between two area...

Страница 5: ...contacts with normally open and normally closed contacts both provided The relays are de energized to indicate an alarm condition The diagram below shows the relay status when each is in an alarm de energized state For other connection options please consult Appendix 5 Wiring Details 4 20 mA The module is equipped with an analog 4 20 mA interface The TTDM adjusts its current output based on whethe...

Страница 6: ...ine 4 displays the current time and date the colon blinks once a second To highlight the present status the line of the display with the most recent event flashes Hint The LCD contrast may be adjusted 24 on foldout Leak 10 ft Leak Cleared Press Reset 16 30 14 Feb 1996 The Icons The Icons 2 on foldout represent the four main states of the TTDM module Monitoring This green LED indicates that the TTD...

Страница 7: ...t see Auto Reset under Leak Settings on page 23 Once the Reset button is pressed the relay returns to normal the red Leak LED extinguishes and the LCD display changes System Normal 16 53 14 Feb 1996 Leak 10 ft Leak Cleared Press Reset 16 30 14 Feb 1996 If the TTDM unit has been installed correctly and the system is clear the LCD display will appear as follows Leak When liquid is detected the follo...

Страница 8: ...x 6 The TTDM module constantly monitors to see whether current is passing between the loops When the system is normal there is no current passing between the loops When there is a leak on the system the maximum current flows just 270 µA the sensing cable operates on low voltage and is safe to touch If however the TTDM module detects a lower but significant level of current flow between the loops i...

Страница 9: ...ed A connection is damaged There is a problem with the module What the Module Does The following shows how the alarm display would appear if the fault were caused by a broken or disconnected cable The TTDM would display a different message for a differ ent type of fault such as a loss of continuity in only one of the sensing loops When a fault condition is detected the following occur An audible a...

Страница 10: ...vents in memory TTDM gives a direct indication of multiple events that is events which happen after an initial leak but before the module is manually reset The first line of the display always indicates where the liquid was first detected This location is the most useful in identifying the source of the leak The second line displays the most recent event For example The second line flashes to high...

Страница 11: ...eqÕd 237 16 53 28 Feb 1996 16 17 Additional Leak If liquid contacts the sensing cable away from the initial leak the module will re alarm If the location is distant from the last alarm the TTDM shows a location in square brackets Brackets indicate that the value shown requires interpretation when an additional leak occurs the value represents the electrical center of the leaks The display also pro...

Страница 12: ...n store up to 512 events If 512 events are already stored the oldest event is discarded as a new event is registered When this has occurred the Events History leaves the bottom line of the display blank Contact Raychem for assistance if you wish to clear the event history Events History Leak 250 ft 09 01 13 Feb 95 21 of 23 Events History Leak Cleared 11 33 15 Feb 95 22 of 23 Events History Reset 0...

Страница 13: ... the location of the leak see Appendix 6 for detail SI Status UI Status These hexadecimal values indicate the current status of the Sensor Interface and User Interface respectively and may assist factory personnel providing diagnostic support SI Comm This indicates the success rate in percent for communications between the Sensor Interface and User Interface boards A value below 90 may indicate a ...

Страница 14: ...djusted 23 on foldout You gain access to the system s settings through the View Edit Settings Menu which is on the main menu see Appendix 1 Menu Structure on page 25 Four types of set tings are available General Leak Ports Self Test In certain parts of the menu structure settings may be changed only after entering a password Entering a Password When an attempt is made to change a restricted settin...

Страница 15: ...orked Contact Raychem for additional information Terminal This selection provides a real time display of communications to and from a modem or host system which can be helpful for diagnostic purposes Self Test Settings You gain access to the Self Test settings through the Self Test Menu the last item on the View Edit Settings Menu see page 25 for the menu structure The Self Test Menu allows indivi...

Страница 16: ... without brackets This likely means the leak is moving or drying New location detected more than 25 ft 8 m from original location TTDM displays most recent average location in square brackets This may indicate a new leak or a new point of contact with a serpentined cable Automatic re alarm after the Re alarm interval a user setting if the leak condition still exists Leak Cleared Displayed when cab...

Страница 17: ... It is recommended that the TraceTek system be thoroughly checked twice a year Such a check will identify conditions that adversely affect the leak locating capability of the sys tem More frequent checks may be required if the sensing cable is repeatedly exposed to leaks or if construction or repair work is done where the sensing cable may be exposed Contact your local Raychem TraceTek representat...

Страница 18: ... 23 24 25 26 NC NO COM NC NO COM 27 28 29 30 31 32 4 20 mA Current Transmitter The TTDM adjusts its 4 20 mA output based on the leak detection status as detailed below Fault conditions Output mA Description 0 Electronic fault or loss of power 1 00 Fault communications between SI and UI boards 2 00 Fault cable break 3 00 Fault cable damage loop imbalance 3 50 Service Required alarm Normal condition...

Страница 19: ...VLocation Leak current resistance location Sensing cable TTDM Current RLocation RS to S Red Green Yellow Black Red Green Yellow Black Relay wiring options The illustrations below show how relays 15 16 and 17 on foldout can be jumpered together to allow remote monitoring of the TTDM status with only a single pair of wires The TTDM de energizes its relays to signal an alarm condition Therefore loss ...

Отзывы:

Нет отзывов