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Connectors

J01, J02

Modular jacks for connection of system bus cabling.

J03

Supply voltage.

J04

For connection of A or D-bus via twisted-pair wiring when modular bus
cabling cannot be used.

J13

Used for diagnostic testing.

Jumpers

S16

Not used.

LEDs

LED01

(Two LEDs combined in one); LED01A Green function indicator and



LED01B Red function indicator.

IC-circuits

IC01

Microprocessor, type 80C188EB.

IC08

Module key.

IC13

FLASH PROM contains the software for the main processor.

IC22

RAM memory.

IC54

FLASH PROM, contains the software for the communication processor.

TD 91684GB

16 April 2015 / Ver. G

Installation Guide
T942C and T942C/2 Central Unit

2.4

Installation

2.4.1

Mounting

Refer to T942C, see

1.4.1 Mounting

on page 7.

2.4.2

Opening the Housing

Refer to T942C, see

1.4.2 Opening the Housing

on page 8.

2.4.3

Mounting Together with Other Units

Refer to T942C, see

1.4.3 Mounting Together with Other Units

on page 9.

2.4.4

Wiring Runs

Refer to T942C, see

1.4.4 Wiring Runs

on page 10.

Summary of Contents for T942C

Page 1: ...TD 91684GB 16 April 2015 Ver G Installation Guide T942C and T942C 2 Central Unit...

Page 2: ...nput 13 1 4 10 Connection of PC 14 1 4 11 Relay Output for System Fault Indication 15 1 4 12 Central Unit Malfunction Output 15 1 4 13 Activation of Power Changeover Circuit 16 1 5 Installation Test P...

Page 3: ...TD 91684GB 16 April 2015 Ver G Installation Guide T942C and T942C 2 Central Unit 3 2 Configuration 24 3 2 1 Set License 25 4 Document History 26...

Page 4: ...the inputs and outputs have transient protection and all bus connections are equipped with chokes for increased EMC protection Figure 1 Central Unit T942C Supply voltage 12 5 V DC 10 Current consumpt...

Page 5: ...y Compliance Statements USA only FCC Compliance Statements This equipment has been tested and found to comply with the limits for a Class B digital device pursuant to part 15 of the FCC Rules These li...

Page 6: ...t to the following two conditions 1 this device may not cause harmful interference and 2 this device must accept any interference received including interference that may cause undesired operation Mod...

Page 7: ...Board Description J02 J01 J08 J07 J14 1 J03 6 1 J04 6 1 J11 6 6 J12 1 SWO1 SWO2 LEDO2 LEDO9 1 3 A B S10 1 3 A B S17 J13 1 942C ICO1 IC13 IC14 LEDO1 IC22 ICO8 IC54 IC50 IC56 IC57 IC23 S01 IC20 IC21 S03...

Page 8: ...r for 4 external digital outputs 12 V DC of type open collector Output 1 is used only in paging systems for connection of Reference Module T938RM Output 2 and GND is used to indicate that the H U952T...

Page 9: ...or from the FLASH PROM ON Read from the non volatile memory OFF Read from the FLASH PROM Section 3 is normally set to OFF when the configuration of parameters is done in PCPAR Section 4 determines if...

Page 10: ...d by trained personnel IMPORTANT The unit must be mounted to a solid vertical wall with the bottom facing the floor Bottom Top The illustration below shows the dimensions in mm for mounting the unit 9...

Page 11: ...ver by applying a light pressure to the two snap catches 1 and remove the cover 2 1 1 2 Figure 5 Releasing the cover Opening the Housing from the Front If the housing has to be mounted without suffici...

Page 12: ...clips which hold the lid will then be released and the cover can be removed 3 1 3 2 Figure 7 Removing the cover To replace the circuit board see 1 6 Circuit Board Replacement on page 19 1 4 3 Mountin...

Page 13: ...bling through the round holes at the back of the case 2 Remove the circular covers at the top of the side case 3 1 2 1 2 3 3 IMPORTANT Do not make any openings at the bottom of the front cover since t...

Page 14: ...ressing Assign the T942C an address on the C bus by setting address switch SW01 hexadecimally See the System Installation document chapter Addressing SW01 OFF ON 1 8 Figure 11 Addressing on T942C If n...

Page 15: ...bus cabling J14 connect only the C bus to another Central Unit via a quick connect terminal block type Krone Pin 1 234567 Pin 8 Pin 1 2 3 4 5 6 7 8 Signal Not used Not used Not used Not used Not used...

Page 16: ...in Supply voltage out to other units Supply voltage out to digital inputs outputs Figure 14 Connector J03 NOTE If the digital inputs and outputs are to be used they must be provided with supply voltag...

Page 17: ...7 Connection of Supply Voltage on page 13 1 4 9 Connection of Monitor Input In some cases it may be desirable to prevent the H U952T Terminal Transmitters from transmitting e g when a carrier wave is...

Page 18: ...GND 5 6 7 8 9 T942C 9 pin female D sub connector for direct connection to PC Figure 18 9 pin modular connector 1 not used 2 TX 3 RX 4 CTRL IN 5 CTRL OUT 6 not used J09 7 GND 8 not used 1 TX 2 RX 3 RTS...

Page 19: ...relay is deactuated for about 20 seconds If the relay is deactuated for more than 20 seconds either the Central Unit or system is malfunctioning 1 4 12 Central Unit Malfunction Output If the relay out...

Page 20: ...y NOTE The power changeover circuit contains a 3V lithium battery At any interruption in the ordinary 5V supply both the RAM and real time clock will be supplied by the battery so that they retain the...

Page 21: ...red or not 2 Check that SW01 is set to the correct address and SW02 is set for desired parameters and that module key IC08 is installed Units with S942C Software 3 Energize all the units in the system...

Page 22: ...m the non volatile memory and any new parameter list can be loaded into the non volatile memory from a PC equipped with PDM 7 Replace the cover When all other units are installed perform the system te...

Page 23: ...are equipped with chokes for increased EMC protection Supply voltage 12 5 V DC 10 Current consumption Max 1 A IMPORTANT Protect the unit against current exceding 20 A Use power cables with cross sect...

Page 24: ...16 April 2015 Ver G Installation Guide T942C and T942C 2 Central Unit 21 2 3 Board Description J02 J01 1 J03 6 1 J04 6 J13 1 ICO1 IC13 LEDO1 IC22 ICO8 IC54 IC50 IC56 IC57 IC23 S16 Figure 26 Circuit bo...

Page 25: ...EB IC08 Module key IC13 FLASH PROM contains the software for the main processor IC22 RAM memory IC54 FLASH PROM contains the software for the communication processor TD 91684GB 16 April 2015 Ver G Ins...

Page 26: ...Connect the modular bus cabling to connectors J01 and J02 Bus Connections via twisted pairs J04 4 5 6 3 1 2 A bus D bus Figure 28 Twisted pairs connection A bus to J04 screw 3 and 4 D bus to J04 screw...

Page 27: ...it begins with a short self test for a few seconds The function indicator indicates this by short blinks at one second intervals The parameter list in the FLASH PROM is copied to the memory If no faul...

Page 28: ...nit will not appear in the PDM 1 Select Options Preferences 2 In the 942C COM port drop down list select which COM port the Central Unit will use on the computer running PDM 3 In the 942C COM port spe...

Page 29: ...is required to set the parameters in the Central Unit 1 Set section 5 on SW02 to ON This is the setting for unlicensing mode 2 Restart T942C by pressing push button S01 The function indicator will fla...

Page 30: ...nuary 2013 Updated 3 1 Preparations in PDM on page 25 new 942C parity parameter added G 16 April 2015 Added Added the following info in 1 Central Unit T942C on page 1 For 541293A rev 3A or later and T...

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