R507 User Manual - Mercury HMI Ltd
Contents
1. No Intrinsically Safe earth is required as the unit is galvanically isolated The inter connection cable between the safe area IS Interface Module C able S afety and the hazard area equipment requires four cores which may be either MK two twisted pairs or a quad Where a quad is used diagonally opposite Description cores should be paired to reduce any communications cross talk Each pair is restricted to the following maximum parameters Loop Resistance 40 Ohms Capacitance 125 nF max L R Ratio 30 micro H Ohm For example a 1 Square millimeter quad cable has approximately the following parameters Resistance 38 Ohms km loop Capacitance 55 nF km L R Ratio 12 5 micro H Ohm Inductance 0 48 milli H km For a cable length of 1km this would satisfy safety and operating requirements SLA20150116 Page 7 of 14 l S Wiring The 4 core Intrinsically Safe wiring can be extended from the safe area where the barrier is mounted up to 1km into the hazardous area to any of the Mercury 2 family of Operator Terminals or the Sentry Card Reader The wiring schedules are shown below Mercu y WI ri ng Barrier Pin No amp Name Mercury Name amp No R507 Pin 13 Rx2 gt RX2 J5 Pin 4 R507 Pin 14 Rxl gt RXI J5 Pin 3 R507 Pin 15 Tx2 lt TX2 J5Pin2 R507 Pin 16 Txl lt TXl J5Pinl Se ntry Wi ring Barrier Pin No amp Name Sentry Name amp No R507 Pin 13 Rx2 gt A J5 Pin 4 R507 Pin 14 Rxl gt B J52. Pin 3 R507 Pin 15 Tx2 lt B J5 Pin 2 R507 Pin 16 Txl lt Ar J5 Pin 1 Mercury IMC Limited recommend that no power is supplied to the R507 I S Interface Module while hazardous area wiring is being terminated at either the R507 or the Mercury Sentry in the field The R507 I S Interface Module is a critical safety component and WARNING should be installed by a competent person in accordance with EN 60079 14 Page 8 of 14 SLA20150116 Safe Area Wiring The R507 LS Interface Module requires a nominal 24V supply of two watts The voltage can be in the range of 20 to 32 Volts but it should be a smoothed and regulated supply with low ripple Power Power Name R507 Name amp No 24V Supply gt 24V In 5 OV Return gt OV 6 Com ms The R507 is designed to work with several physical serial communications standards These are RS 232 for simple point to point communications point to point RS 422 multidrop RS 422 also known as four wire RS 485 and two wire RS 485 RS 422 Host Signal Name R507 Name amp No Or RS 422 Host Tx gt Rx 1 A wire RS 422 Host Tx gt Rx 2 RS 485 RS 422 Host Rx lt Tx 3 RS 422 Host Rx lt Tx 4 24V OV From Host Tx From Host Tx To Host Rx To Host Rx SLA20150116 Page 9 of 14 RS 485 Wiring It must be remembered that since two wire RS 485 is a half duplex transmission medium you cannot use point to point mode in conjuction with
3. RS 485 since the transmit to and reception from the Mercury 2 family or Sentry are completely asynchronous events As RS 485 can only transmit information in one direction at a time unlike RS 232 RS 422 and four wire RS 485 also known as multidrop RS 422 which are full duplex transmision media it requires that a protocol to control the flow of information and to enable the transmitters and receivers to be disabled and enabled as required RS 485 is more of a communications bus than a simple point to point connection If you are not familiar with two wire RS 485 and the difficulties of debugging RS 485 communications we recommend the use of a full duplex connection Host Signal Name R507 Name amp No RS 485 Host TxRx lt gt Tx amp Rx 1 amp 3 RS 485 Host TxRx lt gt Tx amp Rx 2 amp 4 24V OV Host RS485 TxRx Non Inverting Signal Host RS485 TxRx Inverting Signal Page 10 of 14 SLA20150116 RS 232 Wiring RS 232 is a very reliable communications medium over short distances When utilised up to 25 Metres and 115 200 baud no problems should be experienced as long as cables are segregated carefully and care is taken to eliminate noise from the OV terminal The PC 9 way DE 9 pin number is shown in brackets Host Signal Name R507 Name amp No RS 232 TxD 3 gt RxIn 7 RS 232 RxD 2 lt TxOut 8 RS 232 Gnd 5 lt gt GND 6 24V OV Host RS232 Gnd Host RS232 T
4. 485 with tri state control for point to point or multi drop systems Power and data are transmitted over distances up to 1 km in the hazardous area The R507 interface module is a critical safety component and should be installed by a competent person in accordance with EN 60079 14 The R507 LS Interface Module gives almost twice the packing density Size ofits predecessor the R007 The overall size including the demountable connectors but excluding the wiring is 118mm by 122mm by 23 2mm maximum 122 Page 4 of 14 SLA20150116 Rail Ty pe The R507 LS Interface Module is designed to be mounted on standard 35mm symmetrical top hat rail to EN50022 formerly DIN Standard 46277 The R507 is rated to IP54 and is intended to be mounted in a control panel a cubicle or rail mounted enclosure Mou nti ng To mount the R507 tilt the module as shown engage the lower portion on to the top hat rail and while applying light pressure lower the R507 until it is horizontal Release the lateral pressure and the R507 should now be secured to the rail Repeat this process for all subsequent R507 modules Push in this direction Removi ng To remove the R507 from the top hat rail apply gentle lateral pressure in the direction indicated by arrow No 1 and tilt the far end upward The unit will then come away from the rail SLA20150116 Page 5 of 14 Connections Segreg ation The R507 I S Interface Module is designed so th
5. Mercury R507 LS Interface Module User Manual R507 l S Interface Module Mercury HMI Ltd George House Derwent Road Malton North Yorkshire YO176YB Tel 44 0 1653 697200 Fax 44 0 8700 667325 Email sales 9 mercuryHMI co uk Web www mercuryHMI co uk Skype mercuryhmi Page 2 of 14 SLA20150116 Contents oi c T 2 Hie ON ton nee 4 Mounn T see 5 CCODIBCBIOHBS ae 6 Cabla see uidet i die 7 1 9 WINE a 8 Safe Area WICIB unse Siete eratis 9 RS 1855 Wine idees ie ag neni ee iius 10 RS 232 Wire nee 11 Multidrop Wine aussen 12 ATEX MOTI ALE nein 13 Specification iseinean 16 R507 Pin DeseriDtOD seien 17 R507 I S INTERFACE MODULE Mercury Malton YO17 6YB UK Epsilon OGATEX2107 Ex ia IIC YOM SUN Er re Svr 4 Wire Power Comms amp Tx2 Signalling Pilar 9 amp s N 2 Qo SAFE AREA HAZARDOUS AREA Vin 20 35Vdc bo 3 er lin typ 80mA y en Um 250V Lo Ro 33uH Ohm Tamb 20 C to 60 C A Installation must conform x to EN 60079 14 2 SLA20150116 Page 3 of 14 Introduction Backg rou nd The R507 is an interface module providing power and data to Intrinsically Safe 1 S equipment located in a zone 0 hazardous area and providing galvanic isolation between the safe area and the LS hazard area connection In the safe area the communication ports provide both RS 232 for point to point communications or RS 422
6. at all the safe area connections are on one side the left hand side in the illustration below and the Intrinsically Safe wiring to the hazardous area is connected on the right hand side of the module This makes the layout and cable segregation simple The safe area wiring is made to terminals 1 to 8 and the hazardous area wiring is made to terminals 13 to 16 Terminals 9 to 12 are not used and are not connected within the R507 module Care must be taken to ensure that the plug orange plug supplied with WARNING later modules carrying the 24V power intended for the upper terminals on the safe area 5 to 8 is not plugged into the lower safe area terminals 1 to 4 which are used for the RS 422 communication The R507 can be damaged if 24V power is applied to the RS 422 communications ports Power Connections This Plug Not Used Plan View IMC Ltd YO17 6YB UK EEx ia IIC Page 6 of 14 SLA20150116 Cabling Intrinsical ly Safe The R507 LS Interface Module provides a voltage and current limited power source for the equipment mounted in potentially hazardous areas Con nections while also providing bi directional communications and multi drop control using a quad core or two twisted pairs of a cable The R507 is designed to drive Mercury 2 Mercury 2e or Mercury 2 Operator Terminals as well as the Sentry Card Reader Power must be disconnected before connecting or inspecting the IS WARNING interface module
7. tic Black 20V 100 Ohm nominal galvanically isolated See page 7 35mm transverse rail EN50022 20 35V d c 2W maximum Nominal 80mA at 24V Not Required 2 galvanically isolated ports RS 232 RS 422 and RS 485 20 to 60 C 40 to 70 C 95 non condensing IP 54 Safe Area Page 13 of 14 R507 Pin Description S afe A re a Pin No Name Description D iffe re nti al Pin 1 RS 422 Rx Input to the active low differential receiver O m m S Pin 2 RS 422 Rx Input to the active high differential receiver Pin3 RS 422 Tx Input to the active low differential transmitter Pin4 RS 422 Tx Input to the active high differential transmitter P ower amp Pin 5 24V In Positive power input terminal RS 232 Pin 6 OV The 0 volt power return and RS 232 Common Co m m S Pin 7 RxIn RS 232 Receiver input Pin 8 TxOut RS 232 Transmitter output N ot Pin 9 Not Used No internal connection U S ed Pin 10 Not Used No internal connection Pin 11 Not Used No internal connection Pin 12 Not Used No internal connection H az a rd O u S Pin 13 Rx2 MIMC IS Power amp Comms rea Pin 14 Rx1 MIMC IS Power amp Comms l ri ng Pin 15 Tx2 MIMC IS Power amp Comms Pin 16 Txl MIMC IS Power amp Comms Page 14 of 14 SLA20150116
8. x Host RS232 Rx SLA20150116 Page 11 of 14 Multidrop Wiring When a number of Mercury Terminals or Sentry Card Readers need to be connected to a single port on a host PC a DCS or other control system the multi drop facility can be used Multi drop RS 422 four wire RS 485 or two wire RS 485 should be selected as the communications protocol Each piece of hazardous area equipment needs its own R507 module in the safe area and the R507s should be connected to the same host port Each Sentry or Mercury Terminal will need to be configured to have a unique address 24 Volt Power amp RS422 Master Computer Tx Rx m em A B A B z b J5 Pin4 J5 Pin3 J5 Pin2 J5 Pinl J5 Pind4 E S Mercury 2e J5 Mercury 2 5 Pinl Ping J5 Er Pin3 J5 J5 RS 422 Bus to Other Barriers Page 12 of 14 SLA20150116 Specification Part Number Certification Physical Data Connections Environmental Conditions SLA20150116 R507 LS Interface Module Part Number 8185070 EPSILON 06ATEX2107 The R507 must be mounted in a safe area Overall Dimensions Height Width Depth Weight Material Colour IS Terminals IS Cabling Mounting Power IS Earth Isolation Communications Operating Temperature Storage Humidity Protection Location 122mm 118 mm including connectors 23 2 mm 160 grams including connectors Plas
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