Datasheet Content
[{"filename":"NXESI-6101-External_Servo_Interface_NXESI120_English_2015-06-15.pdf","text":"NXESI-6101\n June 19, 2015\n\n\n\n\n 3G-OTH-02769\n External Servo Interface\n For NX6100 and\n PPC6000 Series\n\nDESCRIPTION\n\n\n The 3G-OTH-02769 interface provides the facility to connect non-CANbus servo motors, for example\n NX20, NX50, NX98 or third party devices, into a NEXUS control system. The 3G-OTH-02769 has\n connections to the CANbus and to the servo motor. The CANbus powers and communicates\n with the on-board microprocessor and associated CANbus circuitry. Connections to the motor\n are at Line supply levels (typically 120 or 230Vac) and 5Vdc levels to the feedback\n potentiometer.\n\n CAN modules used in the NEXUS family, have unique serial numbers programmed during\n manufacture. These serial numbers are used to define the device type and its function as part of\n the combustion control system, during commissioning. CAN servo motors and the 3G-OTH-02769\n are considered to be ‘Drives’.\n\n Note: If a drive serial number is changed after commissioning, then any profiles using that drive\n will require re-commissioning. A ‘profile invalid’ fault (see FAULT 64) will lock the burner out on\n an attempt to fire a profile which has had a previously commissioned drive removed or changed.\n The profile can be re-commissioned by using the NEXT / ENTER ‘keys’ in commission ratio\n mode to verify all points on the combustion curve.\n\fSafety information\n\n\n WARNING\n The equipment described in this manual is capable of causing property damage, severe injury, or\n death. It is the responsibility of the owner or user to ensure that the equipment described herein is\n installed, operated and commissioned in compliance with the requirements of all national and local\n legislation, which may prevail.\n\n\n\nWhen this equipment is fitted to an appliance due regard must also be given to the requirements of that\nappliance.\n\nBefore attempting to install, commission or operate this equipment all relevant sections of this\ndocument must be read and fully understood. If in doubt about any requirements consult Fireye.\n\nInstallation, commissioning or adjustment of this product MUST be carried out by suitably trained\nengineers or personnel qualified by training and experience.\n\nAfter installation or modifications to the installation all functions of the equipment MUST be checked\nto ensure safe and reliable operation of the control.\n\nThe manufacturer of this equipment accepts no liability for any consequences resulting from inappropriate,\nnegligent or incorrect installation, commissioning or adjustment of operating parameters of the equipment.\nControl panels must not be left uncovered while power is on. If it is essential to do so while rectifying faults\nonly personnel qualified by training and experience should be involved.\n\nThe time any covers are off must be kept to a minimum and warning notices must be posted.\n\nBefore attempting any work on this equipment or any equipment controlled by or connected to this equipment,\nall related electrical supplies must be isolated.\n\nSafety interlocks must not be removed or over-ridden. Any faults once detected must be corrected before\nthe control is operated.\n\n\nCAUTION – SOME VERSIONS OF THIS EQUIPMENT CONTAIN A LITHIUM BATTERY\n IN THE DISPLAY UNIT\n\n\n NOTE\n\nThe manufacturer of this equipment has a policy of continual product improvement and reserves the right to\nchange the specification of the equipment and the contents of this manual without notice.\n\n\n\n\n 2\n\fTable of contents\nThis manual describes the configuration of the 3G-OTH-02769 External Servo Motor Interface.\n\nPlease read the safety information at the front of this manual before proceeding.\n\n\n\n1. Installation 4\n 1.1 Overview. 4\n\n\n2. Installation 5\n 2.1 Mechanical Fixing 5\n 2.2 Option Link selection 5\n 2.3 Wiring Information 6\n\n\n3. Servo motor selection and calibration. 10\n 3.1 Servo-motor selection 10\n 3.2 Locking the servo-motor to the valve shaft 11\n 3.3 Control direction 11\n 3.4 Feedback potentiometer 11\n 3.5 Adjusting micro-switch positions when using Fireye line voltage servomotors. 12\n\n\n4. Technical Specification. 13\n 4.1 General 13\n\n\n\n\n 3\n\f1. Installation\n1.1 Overview.\nThe 3G-OTH-02769 interface provides the facility to connect non-CANbus servo motors, for example NX20,\nNX50, NX98 or third party devices, into a NEXUS control system. The 3G-OTH-02769 has connections to the\nCANbus and to the servo motor. The CANbus powers and communicates with the on-board\nmicroprocessor and associated CANbus circuitry. Connections to the motor are at Line supply levels\n(typically 120 or 230Vac) and 5Vdc levels to the feedback potentiometer.\n\nCAN modules used in the NEXUS family, have unique serial numbers programmed during manufacture.\nThese serial numbers are used to define the device type and its function as part of the combustion control\nsystem, during commissioning. CAN servo motors and the 3G-OTH-02769 are considered to be ‘Drives’.\n\nNote: If a drive serial number is changed after commissioning, then any profiles using that drive will\nrequire re-commissioning. A ‘profile invalid’ fault (see FAULT 64) will lock the burner out on an attempt to\nfire a profile which has had a previously commissioned drive removed or changed. The profile can be re-\ncommissioned by using the NEXT / ENTER ‘keys’ in commission ratio mode to verify all points on the\ncombustion curve.\n\n\n\n\n 4\n\f 2. Installation\n 2.1 Mechanical Fixing\n The 3G-OTH-02769 interface has an IP65 enclosure with 3 cable entry points. Suitable IP65 conduit\n connections should be used to ensure continuity of the IP rating as required.\n\n Mechanical fixing is using the 4 points outside of the IP65 area as shown below:\n\n\n\n 160 mm (6.3”)\n\n\n\n\n Mounting holes\n63 mm63\n (2.48”) 4 x 4.5mm dia.\n 100 mm (3.93”)\n\n\n\n\n 145 mm (5.71”)\n\n\n\n\n 2.2 Option Link selection\n There are two option links that must be set according to the potentiometer configuration within the servo\n motor, as follows.\n\n\n\n Direct (1:1) potentiometer drive, or Geared (3:1) potentiometer drive.\n\n\n\n\n 5\n\f DIRECT DIRECT GEARED GEARED\n DRIVE DRIVE DRIVE DRIVE\n\n\n\n\n JP3 JP3\n JP3 JP2\n JP2 JP3 JP2\n JP2\n\n\n\n\n2.3 Wiring Information\n\n2.3.0 General\n\n\n CAUTION\n Disconnect the power supply before beginning installation to prevent electrical shock, equipment\n and/or control damage. More than one power supply disconnect may be involved.\n Wiring must comply with all applicable codes, ordinances and regulations.\n Loads connected to the 3G-OTH-02769 unit must not exceed those listed in the specifications as given in\n this manual.\n\n\n\n\nThe enclosure MUST be earthed to ensure safe and reliable operation.\n\nThe screen terminals on the 3G-OTH-02769 only perform an ground function and do not provide strain relief,\nthe signal cable screens only connect at the screen terminals, unless stated otherwise.\nSecure all cables carried in conduit at both ends using a suitable anchorage method in the cabinet.\n\n\nWIRING INSTALLATION MUST BE CARRIED OUT BY A COMPETENT ELECTRICIAN AND IS\nSUBJECT TO I.E.E. WIRING REGULATIONS (BS 7671:1992) AND/OR LOCAL STANDARDS WHICH\nMAY PREVAIL.\n\nHAZARDOUS VOLTAGES MUST BE ISOLATED BEFORE SERVICE WORK IS CARRIED OUT.\n\nAll cabling requiring to operate at above 50v must be multi-strand single core PVC insulated 16/0.2mm\nand should meet the requirements of I.E.C. 227 or I.E.C. 225.\n\nDo not use a green/yellow conductor for any purpose other than earth.\n\nTo comply with EMC requirements, wire the 3G-OTH-02769 expansion unit using the specified cable sizes\nand screen connections. Clamp all signal cable screens to earth using the screen terminals provided on\nthe 3G-OTH-02769. Connect all CANBus cable screens to earth at the control end using the screen\ntermination clamps only.\n\n\n\n\n 6\n\f The equipment described in this manual has been tested for compliance to the directives listed in the\nsection headed ‘approvals’ in the NEXUS manual NEX-6101. However, once connected to a burner and\nother associated controls it is the responsibility of the installer to ensure the complete installation meets\n the requirements of the directives relevant to the particular installation.\n\n\n\n\n2.3.1 Terminal layout.\n\nConnection terminals are identified in the picture below.\n\n\n J5\n\n\n\n\n J4\n\n\n\n\n J3 J1\n\n\n2.3.2 Grounding CANBus cable screens.\n\nSeveral screen termination clamps are provided on the main control. The cable should be prepared by\ncutting around the outer sleeve, taking care not to damage the screen\n\n\n\n\n (1)\n (1). Cut the outer insulation to expose the\n screen.\n\n (2). Pull the sleeving apart to expose 10mm of\n the screen,\n (2) (3). Slide the exposed…
