FIELDPOINT ™ OPERATING INSTRUCTIONS AND SPECIFICATIONS cFP-CB-1/2/3/4 Compact FieldPoint Connector Blocks These operating instructions describe how to install and use the cFP-CB-1, cFP-CB-2, cFP-CB-3, and cFP-CB-4 (referred to inclusively in this manual as the cFP-CB-x).
6 5 CC 4 3 2 1 1 Tie-Wrap Anchors 2 Screw Hole for Strain-Relief Bar 3 Screw Terminals 4 Screw Hole for Top Cover 5 Mounting Screw 6 37-Pin I/O Connector Figure 1. cFP-CB-1 Parts Locator Diagram Note Earlier cFP-CB-1 connector blocks have a different screw-terminal numbering arrangement. 6 7 5 CC – + CH 0 – CH 1 + – + CH 2 – CH 3 + – CH 4 + – CH 5 + – CH 6 + – CH 7 TERMINAL + ASSIGNMENTS 3 cFP-TC-120 4 2 1 1 36-Pin Spring-Terminal Block 2 Mounting Screw Figure 2.
6 7 5 CC + – + CH 0 – CH 1 + – + CH 2 – CH 3 + – CH 4 + – CH 5 + – CH 6 + – CH 7 TERMINAL 3 ASSIGNMENTS cFP-TC-120 4 2 1 1 Tie-Wrap Anchors 2 Screw Hole for Strain-Relief Bar 3 Overlay Showing Channel Assignments of Screw Terminals 4 5 6 7 Screw Hole for Top Cover Mounting Screw Screw Terminals 37-Pin I/O Connector Figure 3.
Wiring to the Connector Block Refer to the I/O module operating instructions for information about wiring configurations, including detailed wiring diagrams and fuse recommendations. Note To protect the FieldPoint system and connected devices, install appropriate external fuses on all terminals. Refer to the Specifications section for the current limits of the cFP-CB-x terminals. Note The V terminals are internally connected to each other and the C terminals are internally connected to each other.
2. Verify that there are no cuts in the wire insulation that can cause a safety hazard. 3. Strip 6 mm (0.24 in.) of insulation from the ends of the wires. 4. Insert the entire stripped ends of the wires into the appropriate screw terminals. Do not allow any bare wire to show outside the screw terminals. 5. Using a 1/8 in. flathead screwdriver, tighten the screw terminals to 0.5–0.6 N ⋅ m (4.4–5.3 lb ⋅ in.) of torque. Wiring to the cFP-CB-2 You need a flathead screwdriver with a blade smaller than 2.3 × 1.
Note If your application is subject to high vibration, National Instruments recommends installing the NI 9940 backshell on the spring-terminal connector. You can order the NI 9940 from ni.com. If your application is subject to hazardous voltage, you must install the NI 9940 backshell on the spring-terminal connector. Caution Figures 7, 8, and 9 show how to install the NI 9940 connector backshell on the cFP-CB-2. Figure 7. NI 9940 Connector Backshell and cFP-CB-2 Figure 8.
Figure 9. NI 9940 Connector Backshell Installed on cFP-CB-2 Wiring to the cFP-CB-4 You need a flathead screwdriver with a blade smaller than 2.3 × 1.0 mm (0.09 × 0.04 in.) to connect wires to the detachable screw-terminal connector. Complete the following steps: 1. Verify that there are no cuts in the wire insulation that can cause a safety hazard. 2. Strip 9 mm (0.35 in.) of insulation from the ends of the wires. 3. Insert the entire stripped ends of the wires into the appropriate screw terminals.
Wiring to the cFP-CB-4 for High-Vibration Environments and Hazardous-Voltage Applications If your application is subject to high vibration or hazardous voltage, National Instruments recommends affixing ferrules to the ends of all signal wires. Refer to Figure 10. Figure 10. Inserting a Wire with a Ferrule into the cFP-CB-4 cFP-CB-1/2/3/4 8 ni.
Installing the Strain-Relief Bar (cFP-CB-1 and cFP-CB-3 Only) The cFP-CB-1 is shipped with two strain-relief bars, one with a foam cushion for wires and one with grooves for jacketed cables. The cFP-CB-3 has one foam-cushion strain relief bar. The tie-wrap anchors on the connector block provide additional strain relief. Figure 11 shows the two strain-relief bars. Figure 11.
2. Tighten the strain-relief screws. If you are using the cushioned strain-relief bar, make sure all the wires are secure against the cushion and not touching metal parts of the connector block. 3. Reinstall the top cover and tighten the top cover screws. 4. Install tie wraps as shown in Figure 13. Front View Rear View Figure 13. Tie Wraps cFP-CB-1/2/3/4 10 ni.
Installing the cFP-CB-x To install the cFP-CB-x, refer to Figure 14 and complete the following steps: 1. Align the captive screws on the cFP-CB-x with the holes on the backplane. The shape of the I/O connector on the cFP-CB-x prevents backward insertion. 2. Press firmly to seat the cFP-CB-x on the backplane. 3. Using a number 2 Phillips screwdriver with a shank of at least 64 mm (2.5 in.) length, tighten the captive screws to 1.1 N ⋅ m (10 lb ⋅ in.) of torque.
Thermocouple Wiring Compact FieldPoint thermocouple input modules can measure the temperature of the terminals on the cFP-CB-x connector block. The modules use this measurement, called the cold junction temperature, to compensate for the thermoelectric voltages generated at these junctions. For the most accurate cold-junction compensation, use the cFP-CB-3 for connecting thermocouple signals.
Isolation and Safety Guidelines Read the following information before attempting to connect the cFP-CB-x to any circuits that may contain hazardous voltages. Caution This section describes the isolation of the cFP-CB-x and its compliance with international safety standards. The field wiring connections are isolated from the backplane and the inter-module communication bus.
• You must connect the protective earth (PE) ground terminal on the cFP-BP-x or cFP-180x backplane to the system safety ground. The backplane PE ground terminal has the following symbol stamped beside it: . Connect the backplane PE ground terminal to the system safety ground using 14 AWG (1.6 mm) wire with a ring lug. Use the 5/16 in. panhead screw shipped with the backplane to secure the ring lug to the backplane PE ground terminal.
Safety Guidelines for Hazardous Locations The cFP-CB-x is suitable for use in Class I, Division 2, Groups A, B, C, D, T4 hazardous locations; Class I, Zone 2, AEx nA IIC T4 and Ex nA IIC T4 hazardous locations; and nonhazardous locations only. Follow these guidelines if you are installing the cFP-CB-x in a potentially explosive environment. Not following these guidelines may result in serious injury or death.
Maximum cable diameter for cFP-CB-1 and cFP-CB-3 ............ 8 mm (5/16 in.) with cable-grooved strain relief Torque for screw terminals cFP-CB-1 and cFP-CB-3............ 0.5–0.6 N ⋅ m (4.4–5.3 lb ⋅ in.) cFP-CB-4.................................... 0.22–0.25 N ⋅ m (1.9–2.2 lb ⋅ in.) Maximum current for terminals1 V and C terminals....................... 4 A All other terminals...................... 2 A Accuracy Cold-junction accuracy ..................... 0.15 °C typ, 0.
Caution Improper wiring may defeat isolation barrier. Environmental Compact FieldPoint connector blocks are intended for indoor use only. For outdoor use, the Compact FieldPoint system must be mounted inside a sealed enclosure. Operating temperature ...................... –40 to 70 °C Storage temperature .......................... –55 to 85 °C Humidity ........................................... 10 to 90% RH, noncondensing Maximum altitude.............................
Electromagnetic Compatibility This product is designed to meet the requirements of the following standards of EMC for electrical equipment for measurement, control, and laboratory use: • EN 61326 EMC requirements; Industrial Immunity • EN 55011 Emissions; Group 1, Class A • CE, C-Tick, ICES, and FCC Part 15 Emissions; Class A Note For For EMC compliance, operate this device according to product documentation.
Environmental Management NI is committed to designing and manufacturing products in an environmentally responsible manner. NI recognizes that eliminating certain hazardous substances from our products is beneficial not only to the environment but also to NI customers. For additional environmental information, refer to the NI and the Environment Web page at ni.com/environment.
Where to Go for Support For more information about setting up the Compact FieldPoint system, refer to these National Instruments documents: • Compact FieldPoint controller user manual • Compact FieldPoint I/O module operating instructions Go to ni.com/support for the most current manuals, examples, and troubleshooting information. For telephone support in the United States, create your service request at ni.com/ask and follow the calling instructions or dial 512 795 8248.
