Electrical Heat Tracing | Heat Tracing | nVent RAYCHEM
Instruction Manual for nVent models including: ACS-UIT3 User Interface Terminal, ACS-UIT3, User Interface Terminal, Interface Terminal, Terminal
Mar 19, 2024 — These instructions describe how to mount the ACS-UIT3 on a wall and how to make connections to the User Interface Terminal and are intended for a qualified ...
File Info : application/pdf, 8 Pages, 795.07KB
DocumentDocumentACS-UIT3 Remote User Interface Terminal For nVent RAYCHEM ACS-30 Systems Installation Instructions APPROVALS Nonhazardous Locations NETWORK CONNECTION Local/Remote Port RS-232/RS-485 ports (RS-485, 2-wire isolated) may be used to communicate with host computers (ACS-30 Program Integrator) or DCS Local RS-232 A non-isolated, 9 pin D sub male Remote RS-485 #2 10 pin terminal block, 2412 AWG (0.2 mm to 2.5 mm2) wire size Data rate 9600 to 57600 baud Maximum cable length For RS-485 not to exceed 1200 m (4000 ft). Cable to be shielded twisted pair. Field Port RS-485, 2-wire isolated. Used to communicate with external devices, such as ACS-PCM2-5, ACS-CRM and RMM2/ RMM3. Maximum cable length not to exceed 1200 m (4000 ft). Cable to be shielded twisted pair. Field RS-485 #1 10 pin terminal block, 0.2 mm to 2.5 mm2 (2412 AWG) wire size Data rate To 9600 baud LAN 10/100 Base-T Ethernet port with Link and Activity Status LEDs USB Ports USB 2.0 Host port Type A receptacle (X2) DESCRIPTION The nVent RAYCHEM ACS-UIT3 is a wall-mounted display which allows the User Interface Terminal (UIT) to be installed remotely. The ACS-UIT3 is used with nVent RAYCHEM ACS-30 series control and monitoring systems. The ACS-UIT3 is rated IP 65 (Type 4), and is approved for nonhazardous indoor and outdoor locations. These instructions describe how to mount the ACS-UIT3 on a wall and how to make connections to the User Interface Terminal and are intended for a qualified electrician. TOOLS REQUIRED · Small flat-head screwdriver · Phillips (cross-head) screwdriver · Drill or hole punch for electrical conduit entries ADDITIONAL MATERIALS REQUIRED · Wall fasteners for surface mounting (four #1/4-20 bolts) · RS-485 cable (Belden # 8761 or Carol # C2514) KIT CONTENTS Qty Description 1 ACS-UIT3 display 4 Elastomeric washers 1 5-ft 9-pin RS-232 (Null Modem) cable 4 Enclosure-mounting tabs GENERAL Area of use Nonhazardous, Indoors and outdoors (IP65, Type 4) Supply voltage 100 240 Vac ±10%, 50/60 Hz Supply terminal 26 12 AWG Operating temperature 25°C to 50°C (13°F to 122°F) Storage temperature 25°C to 80°C (13°F to 176°F) Dimensions 386 mm W x 336 mm H x 180 mm D (15.21 in. W x 13.21 in. H x 7.09 in. D) ALARM OUTPUTS Relay outputs Three form C relays rated at 12 A @ 250 Vac. One relay used for common alarm light. Relays may be assigned for alarm outputs. LCD DISPLAY Display Touch screen LCD is a 8.4 inch XGA, color TFT transflective device with integral LED backlight 5-wire resistive touch screen interface for user entry. WARNING: Fire Hazard: The ACS-UIT3 must not be used in hazardous locations. Electrical components within the unit could ignite flammable gases. Do not install the unit where it may be exposed to flammable gases. 2 | nVent.com/RAYCHEM IMPORTANT: The ACS-UIT3 is an electronic device. During installation, take the following precautions to avoid damage to its electronic components. · Handle with care to avoid mechanical damage. · Keep electronics dry. · Avoid exposure to static electricity. · Avoid contamination with metal filings, liquids, or other foreign matter. · Take care to protect the user interface board on the enclosure door. · Use agency-approved conduit bushings, adapters, and cable glands to keep the enclosure protected from dust and fluids. MOUNTING THE ENCLOSURE The nVent RAYCHEM ACS-UIT3 controller must be mounted in a nonhazardous indoor or outdoor location. Choose a location indoors or outdoors where the controller will be protected from the elements and kept above 25°C (13°F) and below 50°C (122°F). Install the enclosure using the four #1/4-20 bolts (not provided) in the mounting holes with centers as shown below. 386.4 mm (15.21 in) 335.6 mm (13.21 in) 367.3 mm (14.46 in) 348.3 mm (13.71 in) ELECTRICAL SAFETY Follow electrical safety procedures when installing and maintaining the ACS-UIT3 unit, as line voltage is present inside. Back side of UIT Incoming Power Supply Power 123 Alarm Relays Field Remote RS-485 Ports nVent.com/RAYCHEM | 3 CONNECTING MAIN POWER Use only copper conductors for field wiring. A close-up of the power connection terminals is shown below. This connection energizes the nVent RAYCHEM ACS-UIT3 electronics only; it does not provide power to the heat tracing or contactor coils. Note: If the nVent RAYCHEM ACS-UIT3 user interface has a different source of power than the heat tracing, it may be worthwhile to install an uninterruptible power supply (UPS) so the unit can continue to control and/or monitor the heat tracing in the event of a localized power failure. Ø or N Ø G 100 240 Vac ±10% CONNECTING MAIN POWER The ACS-PCM2-5 and RMM modules communicate with the ACS-UIT3 over an RS-485 network, which may have a total cable length of 1200 m (4000 ft). The RS-485 communicating cable shall be a shielded, two conductor (twisted pair) cable. Shield RS-485 + To downstream devices (ACS-PCM2-5 and RS-485 RMM modules). Refer to "As Built" drawings for connection details. For RS-485 cable type, reference Belden #8761 or Carol #C2514. 54321 T9876 RS-485-2 RS-485-1 To Remote Port RS-485 cable to RS-485-1 on UIT (preconnected) Refer to the ACS-30 Programming Guide (H58279) and the ACS-PCM2-5 Installation Instruction (H58672) for further details. CONNECTING RS-485, RS-232 AND ETHERNET REMOTE PORT COMMUNICATION (OPTIONAL) These ports are used to communicate to a host computer or DCS and are user selectable for either RS-485, RS-232 or Ethernet. If the RS-232 port is utilized, the supplied female to female, 9-pin null modem adaptor cable must be used. Shield Optional RS-485 connection RS-485 RS-485 + To DCS or PC 54321 T9876 Optional RS-232 Connection RS-232 RS-485-2 RS-485-1 Ethernet RS-485 cable to RS-485-2 on UIT (preconnected) RS-485-1 Optional Connection Ethernet Connection ALARM LIGHT AND OPTIONAL ALARM RELAYS Relay 1 on the ACS-UIT3 is factory-configured and wired for "Any Alarms". It will energize a push to test light on the front of the panel if any alarm occurs. The ACS-UIT3 has two other Form C alarm relays for external alarms. Each relay can be connected to an annunciator light or Building Management System (BMS). Note: The above relays are shown in the energized position without an alarm condition. The relay will change state with an alarm condition or loss of power. To Alarm NC Light C C NC Relay 2 NO C NC Relay 3 NO 4 | nVent.com/RAYCHEM 1 2 3 Alarm Relays ACS-UIT3 CONNECTION DIAGRAM CAN (not used) RS-485 (not used) RS-485 Power USB (not used) Side view Front view Open Collector Outputs USB device port (not used) RS-485-2 RS-485-1 Debug Port (not used) Bottom view Ethernet RS-485-1 Termination Side view RS-485-2 Termination RS-232 Back view nVent.com/RAYCHEM | 5 OVERVIEW OF WIRING Ø or N 100-240 Vac Ø ±10% G To Alarm Light NO NC C NO NC C Power Supply Incoming Power To downstream devices (ACS-PCM2-5 and RMM modules) To PC RS-485 + RS-485 RS-485 + RS-485 Shield Shield 54321 T9876 54321 T9876 1 2 3 Alarm Light and Optional Alarm Relays RS-485 Field Port RS-485 Remote Port SERVICING The ACS-UIT3 contains no user-serviceable parts. Contact your nVent representative for service and an authorizationnumber if required. CLEANING The touch screen area of the ACS-UIT3 may be cleaned with a damp or dry cloth. Typical window cleaning agents may be applied to aid in the removal of dirt, dust and grease. Do not use abrasive cleaners. 6 | nVent.com/RAYCHEM RS-485 CONFIGURATION SWITCHES The configuration switches are found on the right side of the ACS-UIT3. Refer to the table below for settings. 321 ON RS-485-1 Termination RS-485-2 Termination Pull-down Pull-up Termination Position Switch On Off Comments Pull-down (As-shipped default) RS-485 network "" signal is forced to a determinate state when idle. RS-485 network "" signal is not forced to a determinate state when idle. One device (typically this ACS-UIT3) on the RS-485 network should force the network "" signal to a determinate state. Pull-up (As-shipped default) RS-485 network "+" signal is forced to a determinate state when idle. RS-485 network "+" signal is not forced to a determinate state when idle. One device (typically this ACS-UIT3) on the RS-485 network should force the network "+" signal to a determinate state. (As-shipped default) RS-485 Termination network is terminated with 120-ohm resistor. RS-485 network is not terminated. Terminate the device (ACS-UIT3 or other) that is at each end of the RS-485 network, for a total of two terminated devices. No other devices on the network should be terminated. RESET SWITCH The Reset switch can be found on the side of the ACS-UIT3. A Reset pointed object is required to press the reset switch and restart the ACS-30 software nVent.com/RAYCHEM | 7 North America Tel +1.800.545.6258 Fax +1.800.527.5703 thermal.info@nVent.com Europe, Middle East, Africa Tel +32.16.213.511 Fax +32.16.213.604 thermal.info@nVent.com Asia Pacific Tel +86.21.2412.1688 Fax +86.21.5426.3167 cn.thermal.info@nVent.com Latin America Tel +1.713.868.4800 Fax +1.713.868.2333 thermal.info@nVent.com ©2023 nVent. All nVent marks and logos are owned or licensed by nVent Services GmbH or its affiliates. All other trademarks are the property of their respective owners. nVent reserves the right to change specifications without notice. RAYCHEM-IM-N00729-ACSUIT3-EN-2311 nVent.com/RAYCHEM