Related Manuals for Johnson Controls METASYS NU-XBN101-0
Summary of Contents for Johnson Controls METASYS NU-XBN101-0
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Page 1: Table Of Contents
Multiplex Binary Introduction Page Description Capabilities Specification Engineering Theory of Operation Design Considerations XBN Switches Wiring Details Software Setup Commissioning Procedures Overview Switch Settings Power Up Troubleshooting Procedures Self-Diagnostics Field Checks Ordering Information © 1993 Johnson Controls, Inc. Order No. 636-027... - Page 2 2 Point Multiplex Modules—Multiplex Binary...
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Page 3: Introduction
Introduction The Multiplex Binary (XBN) is a module that interfaces points to the Description system and resides in the Network Control Unit (NCU) or Network Expansion Unit (NEU). It monitors up to 32 binary inputs (voltage, dry contact, or pulse), then reports changes in their states to the NCU for processing. - Page 4 Purpose The XBN interfaces a high concentration of binary input points to the NCU or NEU. The inputs may be any combination of these points: dry contact, up to 10 Hz frequency, and up to 120 VAC or VDC. When residing in or remote to an NCU, the XBN serves to increase the point capacity of the NCU.
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Page 5: Capabilities
Capabilities Table 1: Capabilities Capability Description Purpose Modular Packaging XBN electronics are integrated with system circuitry Simple to install and service; casing prevents (eliminating the need for separate boxes for wires, physical and ESD damage in addition to shielding transducers, etc.) and are housed in durable cases. electronics from induced noise. -
Page 6: Specification
Table 2: Specifications Specifications Product Description Code Name Multiplex Binary (NU-XBN101-0) Microprocessor Intel 80C51 Memory 8K by 8-bit Static RAM 8K by 8-bit E 2 PROM Binary Inputs 32 (contact, voltage present/absent, and low frequency pulses) Maximum Input Voltage 120 VDC or 120 VAC RMS 50/60 Hz 10 Hz or less (at 10 Hz, 12 mS <... -
Page 7: Engineering
Engineering The figure below illustrates the XBN’s general components and their Theory of functions. Operation Field input is routed either through an IUN function module or directly into the base frame, depending on the XBN’s slot position. Address IUN FM Signal Debounce Input... - Page 8 (e.g., -14) produce a logical 0. For large AC voltages, this may not have consequences, but low voltage levels will result in errors. Address switches provide a means to identify the module along the N2 Bus. An End-of-Line (EOL) switch must also be positioned correctly for the N2.
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Page 9: Design Considerations
The XBN monitors up to 32 binary inputs. As a module that fits into Design specific slots on the NCU/NEU base frame, its environmental Considerations requirements are identical to those of the NCU/NEU and may be referenced in that technical bulletin. Power is supplied by an associated, and separately ordered, Power Supply Module. - Page 10 IUNs to transmit signals to the XBN. The presence of the IUN FM does not change or expand the range of signals processed by the XBN. All configurations of the XBN in relation to other modules in the NCU/NEU panel are compatible, provided that the modules are properly located and the points correctly defined in the software.
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Page 11: Xbn Switches
Set the following switches on the XBN. Although the switches may be set XBN Switches either before or after installing the module, the N2 address switch must be set before turning power On (to register the physical address switch in memory). -
Page 12: Wiring Details
Since the XBN and its associated power supply are both in modular form, Wiring Details the act of installing the module onto a base frame also makes all of the wiring connections for it. Only the field and communication wires need to be terminated. - Page 13 If the (-) line is daisy chained as a single common (Figure 7), consistency between (-) and (+) wires must be maintained. Also, 18 AWG (maximum) wire must be used where the two (-) wires insert under a single terminal. 18 AWG Termination or smaller...
- Page 14 Voltage Inputs, Line Voltage AC Line-voltage AC inputs (>30 VAC RMS) can also be wired without concern for polarity; again, consistency is recommended for both service and safety purposes (Figure 9): 120 VAC Neutral Termination Board =Motor or Pilot Light Binary Input 1 Neutral...
- Page 15 Voltage Inputs, DC and Low-Voltage AC Terminate all DC and low AC (<30 VAC RMS) voltages in the manner illustrated in Figure 10. Wire the: positive voltage to the most internal (+) terminal negative voltage to the middle (-) terminal shields, if used, to the ground terminal In put 1 In put 1...
- Page 16 Field Wiring Six kinds of applications that input to the XBN are described on the Applications following pages. Three common applications connect to the XBN without alteration to the circuit: devices wired across a load devices wired across non-grounded (dry) contacts devices in contact mode with open inputs and one side grounded Three other applications require a small modification before connecting to the function module because unloaded XBN voltage inputs are sensitive to...
- Page 17 Binary Input Wired Across the Load A binary input wired across the load (Figure 11) is a typical wiring configuration and requires no alteration to the circuit. Set the XBN mode switch to voltage. Examples of these loads include: • fan motors •...
- Page 18 Binary Input Wired Across the Dry Auxiliary Contacts A binary input wired across the dry auxiliary contacts (Figure 13) is a second typical wiring configuration. It also requires no alteration to the circuit. Set the XBN mode switch to contact. Examples of these loads include: •...
- Page 19 Open Inputs with One Side Grounded If an open input device is wired to ground on one side of the circuit (Figure 14), set the XBN switch to contact mode to provide accurate readings. xbn12 Figure 14: With Open Binary Inputs and One Side Grounded, Set XBN Switch to Contact Mode Point Multiplex Modules—Multiplex Binary...
- Page 20 Unpowered Triac or SCR If the XBN input is coming from a transmitter device with a triac or SCR output, an AC source must power the output. If the transmitter does not supply the AC power to the output, you must add the power externally. Connect the AC voltage through a limiting resistor, as shown in Figure 15.
- Page 21 High Powered (>1 Amp) Non-Wiping Contact An example of this kind of device is the KZ-4000 Series relay. Since corrosion may form on the contacts, use of a voltage bias circuit will overcome resistance caused by the corrosion. Add the voltage bias circuit to the device in the manner illustrated above, using a 100K ohm, one-half watt resistor.
- Page 22 Added Resistor Series Resistor Not Accessible 120 V Neon xbn15 Figure 17: Sensing Across the Added Series Resistor for Neon Lamp Applications Do not connect a neon lamp device as shown in Figure 18, which still leaves the circuit open when the lamp is off and allows for noise to collect on the “antenna”...
- Page 23 Terminal Blocks and Field devices are wired to terminal blocks in different configurations, Bays depending on which slot the XBN modules are installed. Figure 19 identifies the terminal block and bay numbering for each of the base frame sizes. 5-slot B ays 1-5 T B F1 0 1 B ays 6-9...
- Page 24 The next three illustrations diagram the different ways to wire field devices into the terminal bays. 5-slot T BC T B P In put 1 B a y 1 B a y 2 In put 16 (D o n o t us e) B a y 3 In put 17 B a y 4...
- Page 25 5-slot 5-slot 2-slot When in Slot 2 When in Slot 4 B ay 6 B ay 7 B ay 8 B ay 9 B ay 7 B ay 6 In put 1 In put 17 Inpu t 1 Inpu t 17 Input 1 In put 17 In put 32...
- Page 26 5-slot T BP Inp ut1 B ay 10 B ay 11 In put 16 B ay 12 (D o n o t u se ) In put 17 B ay 13 B ay 14 In put 32 T BF 30 1 S cre w Te rm inals (N ote: N um bers m a y n ot a ppe ar o n...
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Page 27: Software Setup
Define the XBN hardware object by entering data into the attribute fields Software Setup on the Definition menu. Figure 23 shows the menu as seen on the Operator Workstation; following is a description of each attribute’s characteristics. If the definition window is a new selection, all the fields will be initialized to a default state. - Page 28 Expanded ID Enter any valid 0-24 character string. N2 Bus Connection NC Trunk Number Identification A check must be made that the port selected is defined as an N2 trunk. Device Address (0-255) Enter the N2 address assigned to the XBN. The address must not be assigned to any other device on this N2 trunk.
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Page 29: Commissioning Procedures
Commissioning Procedures Commissioning an XBN begins after the module and associated Power Overview Supply Module have been installed into the NCU/NEU, the field wires inspected, and the points defined in software. Refer to the Engineering section, as well as the NCU/NEU Technical Bulletin, for information regarding these steps. - Page 30 N2 Address Switch The address switch on the XBN is used by the NCM for communications, and is set to the same number as was assigned to the XBN in software. The address is set according to the numbering on the faceplate; the numbers are in binary format and vertically arranged, with the least significant digit on top.
- Page 31 Voltage/Contact The XBN has 4 contact/voltage switch blocks containing 8 switches each, Switches for a total of 32. The switches are numbered (1-32) with each switch defining a corresponding field input as either a contact input or voltage input (frequency inputs are characterized by their source as either contact or voltage).
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Page 32: Power Up
Power Up The LED indicators (Figure 27) supply evidence of the module’s LEDs condition, and help determine that the module is functioning properly. LEDs indicate state of inputs 1-16 as received by the microprocessor. LED orientation is software programmable, defined as On for either contact closed/voltage present or contact open/voltage absent. -
Page 33: Troubleshooting Procedures
Troubleshooting Procedures Turn On the Power Supply Module to initialize the XBN. At the Self-Diagnostics beginning of the XBN’s initialization, the ERROR LED and all point LEDs turn On for approximately three seconds. 1. First, the On condition of the LEDs tests whether or not all the LEDs are functioning. - Page 34 If the transmit LED never lights, check if the green RECV (receive) LED lights. If the RECV LED does not light, the XBN is not receiving data from the N2 Bus and therefore is not connected properly to the N2 Bus. Refer to the N2 Communications Bus Technical Bulletin in this manual.
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Page 35: Ordering Information
Table 4: Ordering Information Ordering Description Product Code Number Information Expansion Module, 32 Binary Inputs NU-XBN101-0 Expansion Module, 32 Binary Inputs (repair) NU-XBN101-700 Power Supply Module NU-PWR101-0 Point Multiplex Modules—Multiplex Binary... - Page 36 Notes Controls Group FAN 636 507 E. Michigan Street Metasys Network Technical Manual P.O. Box 423 Revision Date 0693 Milwaukee, WI 53201 Printed in U.S.A. 36 Point Multiplex Modules—Multiplex Binary...