Genius I/O System, Bus Switching Modules
Contents
1. ERNATIONAL This Datasheet for the IC660BSMO021 BUS Switching Module 24 48vDC Provides the wiring diagrams and installation guidelines for this GE Series 90 30 module For further information please contact Qualitrol Technical Support at 1 800 784 9385 support qualitrol com GFK 0072D November 1991 e A Bus Switching Module connects Genius I O blocks to dual communications cables Multiple BSMs can be used on the same dual serial bus e Simple reliable operation e BSM operation is controlled by a Genius I O block e BSM can be forced and unforced from the CPU or Hand held Monitor e LED indicates which bus is active Two models are available 24 48 VDC IC660BSM021 115 VAC 125 VDC IC660BSM120 The Genius I O system Bus Switching Module BSM is a simple reliable device used to connect I O devices to two serial busses at the same time Two versions are available the 115 VAC 125 VDC Bus Switching Module IC660BSM120 and the 24 48 VDC Bus Switching Module IC660BSM021 One BSM can connect up to eight discrete and analog blocks to a dual bus Using additional BSMs permits up to 30 I O blocks to interface to the same dual bus This dual bus configuration can be used to provide a backup communications path to be used in case of bus failure Each bus of a dual bus pair is connected to a bus interface module Bus Controller or PCIM If each bus interface module resides in a different CPU the system ca2. area may cause interference to radio and television reception requiring the operator to take whatever steps are necessary to correct the interference Ordering Information Catalog Number Bus Switching Module 115 VAC 125 IC660BSM120 VDC Bus Switching Module 24 48 VDC Prefabricated Cable Belden 9182 type 15 inch quantity 3 Prefabricated Cable Belden 9182 type 36 inch quantity 1 Genius I O System User s Manual IC660BSM021 IC660BLC001 IC660BLC003 GEK 90486 GE Fanuc Automation North America Inc Charlottesville Virginia
3. e Genius I O System User s Manual Configuring the BSM Controller Block For the BSM controller block select the following configuration option BSM Controller enable This reserves the first circuit on the block for use as an output controlling the BSM If the block has selectable inputs and outputs it is possible for the block to be used as an inputs only block but circuit 1 cannot be physically used as an input Configuring All Blocks in the Cluster For all blocks on the stub including the BSM control ler select the following configuration option BSM Present enable Select other options for the block that are appropriate for that block type For blocks with outputs if BSM present has been selected the Outputs Timeout Select option sets either 2 5 or 10 seconds as the delay before the block s outputs will default Use 2 5 seconds unless the bus scan time is over 100mS GFK 0072D Switching the BSM on Command The CPU or a phase B Hand held Monitor can switch the BSM to either bus To switch the BSM from the CPU use the Switch BSM command in the program This command allows the BSM to switch again subsequently If the BSM is forced using the Hand held Monitor the BSM cannot switch again until unforced To force the BSM from the Hand held Monitor 1 From the Home menu select ANALYZE F2 From the Analyze menu select MONI TOR CONTROL REFERENCE F2 The HHM shows the active bus and indicates whe
4. h cables terminate at the BSM install two resistors Completing the Cluster To complete the cluster connect the other blocks on the stub to the BSM controller block using short lengths of cable i a42360 BUS CONTROLLER BUS CONTROLLER PASA A AA AAAA E UA SAA E A SA A DL ie i b a a a a a a o aaa Loss as Le BSM CONTROLLER L UP TO 7 BLOCK MORE BLOCKS If there is just one bus stub its maximum length is 20 feet a Bus Switching Module GFK 0072D Prefabricated Cables Prefabricated cables are available which can be used to simplify bus stub wiring These cables come in 15 inch and 36 inch lengths and have built in con nectors at both ends See the Ordering Information on the last page of this data sheet Connecting the Blocks Always use the prefabricated cables or Belden 9182 or equivalent for BSM stub connections regardless of the cable type used for the cable trunk 1 Attach one end of the bus stub cable over the BSM connectors on the controller block Tighten the Serial 1 and 2 and Shield In and Out terminal screws 2 Connect the other blocks on the stub keeping cable stub length as short as possible The pre fabricated cables have connectors that are notched to fit together securely At each block on the stub attach the cables from the previous block and the next block to the Serial 1 and 2 and the Shield In and Out terminals Tighten the terminals 3 The bus stub
5. k is powered by 230 VAC but the points are powered by either a 115 VAC source or a 125 VDC source use BSM version BSM120 Connect one wire of the BSM to point 1 For a 125 VDC source connect the other BSM wire to DC For a 115 VAC source connect the other BSM wire to the neu tral side of the power supply COM for 125VDC source DC for 125VDC source or neutral or for 115VAC source H for 115VAC source Bus Switching Module 5 Wiring the Dual Bus 1 Select the proper type of cable for the dual bus trunks See the Genius I O System User s Man ual GEK 90486 for cable selection information Use the same type of cable for both serial bus trunks of the pair 2 Complete the serial bus trunk connections as described in the Genius I O System User s Manual Connecting the Bus Cables to the BSM Connect bus A to the terminals on the BSM marked BUS A Connect bus B to the terminals marked BUS a SHLD IN i sHLD out Terminating the Bus Cables Both of the dual bus cables must be terminated at each end with the terminating impedance specified for that cable type The stub should not be terminated If either cable of the dual bus ends at the Bus Switch ing Module install a terminating resistor across the Serial 1 and Serial 2 terminals where that cable attaches to the BSM Terminating resistor plugs as shown below can be ordered separately GFK 0072D TERMINATING RESISTOR PLUG If bot
6. n also support CPU redundancy Genius I O System Bus Switching Module a42356 TWI 3s 4 L v sna Wild4as gI3IHS t LNO NI g sna Q1SIHS ino Ni A phase B discrete block in the cluster controls the operation of the Bus Switching Module The first circuit on this discrete block functions as an output dedicated to the BSM This output causes the BSM to switch busses if communications are lost on the cur rent bus If an operational bus cannot be found with one switch of the BSM the BSM waits until communication is restored on the connected bus or until power is cycled to the BSM controller block This prevents unnecessary switching by the BSM when no commu nications are present De energized the BSM con nects the block s to bus A The BSM is energized only when selection of bus B is required The LED on the Bus Switching Module lights when bus B is active The BSM can also be commanded to switch busses by the CPU or Hand held Monitor 2 Bus Switching Module GFK 0072D Multiple BSMs on a Bus More than one BSM can be used on a dual bus a42361 BUS BUS INTERFACE MODULE INTERFACE MODULE The locations of BSMs depend on the type of bus trunk cable and baud rate as explained below BSM Stub Distribution The maximum length of all stubs on a bus should be 100 feet or less Within each 20 section of the actual bus length the total maximum stub length is 20 feet Fo
7. plete GFK 0072D 6 Connect the BSM like a load to circuit 1 on the block See the block s data sheet for wiring information As an example connection for an 8 circuit AC block is shown below The pigtail wires used to connect the Bus Switch ing Module to its controller block are not polarized 4 Bus Switching Module GFK 0072D Using a Relay Block as a BSM Controller If a Relay Output Block version IC660BBR100 or BBR101 is used as the BSM s controller block selection of which BSM to use depends on the voltage that will power the block s outputs If this voltage will be 24 48 VDC BSM021 is needed If the volt age will be 115 VAC or 125 VDC BSM120 is needed Refer to the illustrations below Relay Block and Points Powered by 115 VAC If the block and points are powered by 115 VAC use BSM version BSM120 Connect one wire of the BSM to point 1 and connect the other BSM wire to N Jumpering terminal J1 to COM as shown below allows the points to operate on the same 115 VAC source that powers the block a42902 COM Relay Block Powered by 230 VAC Points Powered by 24 48 VDC If the block is powered by 230 VAC but the points are powered by a 24 48 VDC source use BSM ver sion BSMO021 Connect one wire of the BSM to point 1 and the other to DC 24 48VDC TO oct POWER TO SUPPLY POWER SUPPLY Relay Block Powered by 230 VAC Points Powered by 115 VAC or 125 VDC If the bloc
8. r example for a trunk cable 3000 long 20 of the trunk cable length is 600 Therefore 20 of bus stub cable can be located within any 600 section of the bus The 20 stub cable length can be divided into shorter stubs provided that the total of the stubs in each incremental section of the bus is 20 or less For the same example the maximum length of all stubs over any 600 span of the serial bus is 20 feet This could be two 10 stubs with up to 8 blocks on each or four 5 stubs with fewer blocks on each Additional BSMs can be located elsewhere on the bus No 20 increment can have more than 20 of bus stubs a42383 20 20 20 20 20 20 A 9818 Maximum Trunk Cable Length Cable feet meters at baud rate B 9182 B 9841 1000ft 1500ft 2500ft 3500ft 303m 455m 758m 1061m A 9818D B 9815 B 9855 A 9814 800ft 1500ft 2500ft 3500ft A 9814C 242m 455m 758m 106im B 9463 Limited to 16 taps at 38 4 Kbaud amp Make 153 65 153 6e B 89182 A 9109 1500ft 2500ft 3500ft 6000ft 455m 758m 1061m 1818m B 9207 C 4798 B 89696 A 5902C 200ft SOOft 1200ft 2500ft B 9302 30m 152m 333m 758m COMBINED 100 FEET MAXIMUM A 9823 2000ft 3500ft 4500ft 7500ft 606m 1061m 1364m 2283m C596 A 9818C B 89207 A 9110 1200ft 1700ft 3000ft 4500ft 364m 516m 909m 1364m B 89855 Notes A Alpha B Belden C Consolidated Bus S
9. that connects the blocks in the clus ter does not require a terminating resistor Removing the BSM It is seldom necessary to remove a Bus Switching Module in an operating system The Electronics Assembly of the block to which the BSM is attached can be removed and replaced without disturbing the block s Terminal Assembly or the Bus Switching Module If it is necessary to remove a Bus Switching Module or the Terminal Assembly to which it is attached the system should be powered down WARNING A Bus Switching Module should not be removed while the system is operating Removing a BSM disrupts communications on the bus and can lead to unexpected and possibly hazardous control conditions If it should be necessary to remove a BSM without powering down the block to which it is attached first remove the BSM s pigtail cable from the block Use an insulated screwdriver to carefully disconnect the pigtail wires which carry either 115V AC 125VDC or 24 48VDC power from the block terminals WARNING Do not remove the BSM with the pigtail cable connected to a block that has power applied Electric shock may result Bus Switching Module 7 ss Configuration Information The BSM controller and the other blocks on the stub must be configured using a phase B Hand held Moni tor IC660HHMS501 Configuration requirements for the BSM controller block and other blocks in the cluster are summarized below For more information see th
10. ther it 1s forced For example bo To force the BSM to select the other bus select either busA F2 or busB F3 The HHM dis plays the forced bus MNTR CTRLI STATE BUS rels bus B gt busa 3 Check the LED on the Bus Switching Module It will be off when bus A is selected and on when bus B is selected 8 Bus Switching Module ss R GFK 0072D Bus Switching Module Specifications Operating temperature 0 C to 60 C 32 F to 140 F Storage temperature 40 C to 70 C 40 F to 158 F Humidity 5 to 95 non condensing Size HxWxD 3 50 x 2 25 x 2 5 8 9cm x 5 72cm x 6 35cm 24 48 VDC Block Input voltage Bus B selected 18 VDC to 56 VDC not polarized Bus A selected Less than 4 VDC not polarized Current draw at 24 VDC 17mA maximum 10mA minimum at 48 VDC 60mA maximum 30mA minimum 115 VAC 125 VDC Block Input voltage 50 60Hz Bus B selected 90 VAC minimum to 130 VAC maximum or 95 VDC minimum to 150 VDC maximum Bus A selected Less than 35 volts AC or DC Current draw 50 60Hz at 115 VAC 40mA minimum 60mA maximum at 120 VDC 5mA minimum 12mA maximum Reliability 500 000 operations minimum Switch activation time Less than 20mS including switch bounce Switch release time Less than 70mS including switch bounce NOTE This equipment complies with the requirements in part 15 of FCC rules for a class A computing device Operation of this equipment in a residential
11. witching Module 3 Installing the BSM The Bus Switching Module mounts to the side of a phase B block This block must provide an output circuit to control the switching operation of the BSM The following types of blocks can be used as the BSM controller BSM Type Block Type Relay Output blocks IC660BBR100 101 8 Ckt 11SVAC I O IC660BBD100 101 8 Ckt 115VAC 125VDC Iso IC660BBS100 101 16 Ckt 24 48VDC Source IC660BBD020 IC660BBD022 IC660BBD021 IC660BBD023 IC660BBD024 IC660BBD025 IC660BBA024 104 32 Ckt 5 12 24VDC Sink Current Source Analog Current Source Analog Out IC660BBA025 105 IC660BBA026 106 IC660BBA023 103 Current Source Analog In Thermocouple BSM version IC660BSM021 has been notched to fit against the larger Terminal Assembly of a 32 circuit DC block A 32 circuit DC block must operate at 24 VDC nominal to act as a BSM controller Install the BSM on the side of the BSM controller block as described below 1 Remove the grounding screw located on the top left side of the block behind the bus connection terminals Use the grounding screw in the lower ground location to ground the block Loosen the Serial 1 and 2 and Shield In and Out terminal screws on the controller block Insert the BSM connectors under the terminals Using 10 32 x 1 2 pan head screw and matching lock washer bolt the BSM to the upper ground ing hole Do not tighten the terminal screws until bus stub wiring is com
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