XM-944 Process/Temperature Terminal Base Catalog Number 1440-TB-E Installation Instructions For information about See page Important User Information 2 Safety Approvals 4 Power Requirements 6 Interconnect Limit 7 Wiring Requirements 8 RTD Wiring Considerations 8 Grounding Requirements 9 Mounting on the DIN Rail 13 Wiring 16 Agency Certification 22 Specifications 23
XM-944 Process/Temperature Terminal Base Important User Information Solid state equipment has operational characteristics differing from those of electromechanical equipment. Safety Guidelines for the Application, Installation and Maintenance of Solid State Controls (Publication SGI-1.1 available from your local Rockwell Automation sales office or online at http://literature.rockwellautomation.
XM-944 Process/Temperature Terminal Base 3 ATTENTION Environment and Enclosure This equipment is supplied as “open type” equipment. It must be mounted within an enclosure that is suitably designed for those specific environmental conditions that will be present, and appropriately designed to prevent personal injury resulting from accessibility to live parts. The interior of the enclosure must be accessible only by the use of a tool.
XM-944 Process/Temperature Terminal Base Safety Approvals The following information applies when operating this equipment in hazardous locations. Informations sur l’utilisation de cet équipement en environnements dangereux. Products marked "CL I, DIV 2, GP A, B, C, D" are suitable for use in Class I Division 2 Groups A, B, C, D, Hazardous Locations and nonhazardous locations only. Each product is supplied with markings on the rating nameplate indicating the hazardous location temperature code.
XM-944 Process/Temperature Terminal Base 5 IMPORTANT Model XM-120 Wiring to or from this device, which enters or leaves the system enclosure, must utilize wiring methods suitable for Class I, Division 2 Hazardous Locations, as appropriate for the installation in accordance with the product drawings as indicated in the following table.
XM-944 Process/Temperature Terminal Base European Zone 2 Certification If appropriately marked, this equipment is intended for use in potentially explosive atmospheres as defined by European Union Directive 94/9/CE. Compliance with the Essential Health and Safety Requirements has been assured by compliance with EN 50021 (1999). IMPORTANT Observe the following additional Zone 2 certification requirements: • This equipment is not resistant to sunlight or other sources of UV radiation.
XM-944 Process/Temperature Terminal Base 7 XM Power Supply Requirements Listed Class 2 rated supply, or Fused* ITE Listed SELV supply, or Protection Fused* ITE Listed PELV supply Output Voltage 24Vdc ± 10% Output Power 100 Watts Maximum (~4A @ 24Vdc) Static Regulation ± 2% Dynamic Regulation ± 3% Ripple < 100mVpp Output Noise Per EN50081-1 Overshoot < 3% at turn-on, < 2% at turn-off Hold-up Time As required (typically 50mS at full rated load * When a fused supply is used the fuse must be a
XM-944 Process/Temperature Terminal Base Wiring Requirements Use solid or stranded wire. All XM wiring should meet the following specifications: • 14 to 22 AWG copper conductors without pretreatment; 8 AWG required for grounding the DIN rail for electromagnetic interference (emi) purposes • Recommended strip length 8 millimeters (0.
XM-944 Process/Temperature Terminal Base 9 wires are much different, an error may exist. The closer the resistance values are to each other, the greater the amount of error is eliminated. IMPORTANT To ensure temperature or resistance value accuracy, the resistance difference of the cable lead wires must be equal to or less than 0.01 ohm. To ensure that the lead values match as closely as possible: • Keep lead resistance as small as possible and less than 50 ohms.
XM-944 Process/Temperature Terminal Base XM System DIN Rail Grounding 1 1440-VST02-01RA DYNAMIC MEASUREMENT 1440-REX00-04RD EXPANSION RELAY 1440-VST02-01RA DYNAMIC MEASUREMENT 1440-REX00-04RD EXPANSION RELAY Power Supply 1440-RMA00-04RC MASTER RELAY 1 1440-REX00-04RD EXPANSION RELAY 1440-VST02-01RA DYNAMIC MEASUREMENT 1440-TSP02-01RB POSITION 1440-REX00-04RD EXPANSION RELAY 1440-REX00-04RD EXPANSION RELAY 1440-VST02-01RA DYNAMIC MEASUREMENT 1440-REX00-04RD EXPANSION RELAY Power Supply 1
XM-944 Process/Temperature Terminal Base 11 DIN Rail Grounding Block 24V Common Grounding 24V to the XM module must be grounded. When two or more power supplies power the XM system, ground the 24 V Commons at a single point, such as the ground bus bar. IMPORTANT IMPORTANT If it is not possible or practical to ground the -24Vdc supply, then it is possible for the system to be installed and operate ungrounded.
XM-944 Process/Temperature Terminal Base Transducer Grounding Make certain the transducers are electrically isolated from earth ground. Cable shields must be grounded at one end of the cable, and the other end left floating or not connected. It is recommended that where possible, the cable shield be grounded at the XM terminal base (Chassis terminal) and not at the transducer. DeviceNet Grounding The DeviceNet network is functionally isolated and must be referenced to earth ground at a single point.
XM-944 Process/Temperature Terminal Base 13 Mounting on the DIN Rail You can also mount the terminal base to a grounded mounting plate. Refer to the XM Module User Guide for details. ATTENTION The XM-944 makes a chassis ground connection through the DIN rail. Use zinc plated, yellow chromated steel DIN rail to assure proper grounding. Using other DIN rail materials (e.g. aluminum, plastic, etc.) which can corrode, oxidize or are poor conductors can result in improper or intermittent platform grounding.
XM-944 Process/Temperature Terminal Base 3. Hook the lip on the rear of the terminal base onto the top of the DIN rail, and rotate the terminal base onto the rail. 4. Press down on the terminal base unit to lock the terminal base on the DIN rail. If the terminal base does not lock into place, use a screwdriver or similar device to open the locking tab, press down on the terminal base until flush with the DIN rail and release the locking tab to lock the base in place. 5.
XM-944 Process/Temperature Terminal Base 15 4. Press down on the terminal base unit to lock the terminal base on the DIN rail. If the terminal base does not lock into place, use a screwdriver or similar device to open the locking tab, press down on the terminal base until flush with the DIN rail and release the locking tab to lock the base in place. 5. Gently push the side connector into the side of the neighboring terminal base to complete the backplane connection.
XM-944 Process/Temperature Terminal Base Wiring IMPORTANT For more wiring connection information, refer to the XM Module User Guide. Terminal Assignments WARNING EXPLOSION HAZARD Do not disconnect equipment unless power has been removed or the area is known to be nonhazardous. Do not disconnect connections to this equipment unless power has been removed or the area is known to be nonhazardous.
XM-944 Process/Temperature Terminal Base 17 XM-360 Process Module Terminal Assignments No. Description No.
XM-944 Process/Temperature Terminal Base No. Description No. Description 24 Channel 3 V in (-) / Iin Sense 50 Channel 5 4-20mA (-) 25 Channel 4 V in (+) / Input in 51 Channel 6 4-20mA (-) IMPORTANT The DeviceNet power circuit through the XM module interconnect, whichis rated at only 300mA, is not intended or designed to power DeviceNet loads. Doing so could damage the module or terminal base.
XM-944 Process/Temperature Terminal Base 19 XM-361 Temperature Module Terminal Assignments No. Description No.
XM-944 Process/Temperature Terminal Base No. Description No. Description 24 Channel 3 TC (-) / RTD (-) 50 Channel 5 4-20mA (-) 25 Channel 4 TC (+) / RTD (-) 51 Channel 6 4-20mA (-) IMPORTANT The DeviceNet power circuit through the XM module interconnect, whichis rated at only 300mA, is not intended or designed to power DeviceNet loads. Doing so could damage the module or terminal base.
XM-944 Process/Temperature Terminal Base 21 XM-362 Isolated Thermocouple Temperature Module Terminal Assignments No. Description No.
XM-944 Process/Temperature Terminal Base No. Description No. Description 24 Channel 3 TC (-) 50 Channel 5 4-20mA (-) 25 Channel 4 TC (+) 51 Channel 6 4-20mA (-) IMPORTANT The DeviceNet power circuit through the XM module interconnect, whichis rated at only 300mA, is not intended or designed to power DeviceNet loads. Doing so could damage the module or terminal base. To preclude this possibility, even unintentionally, it is recommended that DeviceNet V+ be left unconnected.
XM-944 Process/Temperature Terminal Base 23 Specifications The following table lists the technical specifications for the XM-944 Process/Temperature Terminal Base. Product Feature Specification Power Module Consumption +21.6 to +26.4V dc Maximum (XM-360): 300 mA Typical (XM-360): 170mA Maximum (XM-361, XM-362): 400mA Heat Production Environmental Operating Temperature Storage Temperature Relative Humidity Conformal Coating Maximum: 7.20 Watts (24.
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