Flowserve MX Electronic Actuator - Manual (Page 25)

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Limitorque MX Electronic Actuator FCD LMENIM2306-06 – 10/13
flowserve.com
Table 3.2 – Terminal block rating; control terminals
Low Voltage Row STD Rating Increased Safety Rating
1 points 1-16, 50 Volt 0.5 AMP AC RMS 0.45 AMP AC RMS
2 points 17-35, 125 Volt 0.5 AMP AC RMS 0.45 AMP AC RMS
3 and 4 points 36-54, 250 Volt 5 AMP AC RMS 4.5 AMP AC RMS
3.3.5 Termination of Cables
All terminations should be made with insulated ring terminals using the appropriate crimping tool. See Figures 3.10
and 3.11 for power terminal connection recommendations. See Figure 3.12 and Table 3.2 and 3.3 for control terminal
connection recommendations.
3.3.6 Cable Connections
See Figure 3.14 for connection information.
1. Connect the main power supply cables, including the earth/ground wire using the M5 screws provided.
2. Attach the earth/ground wire to the separate screw on the inside of the terminal compartment.
3. Use the M3 screws installed in the terminal block to connect the control cables in accordance with the wiring
diagram and the project specification.
4. Ensure that all connections are tight, including any spare termination screws that have not been used.
NOTE: A “Customer Connection(s) Diagram” sticker is attached to the interior of the terminal compartment cover. This
may be removed and user termination numbers inscribed adjacent to Limitorque’s terminal block numbers for field
connection reference. The diagram may also be used to assist in locating the terminal block positions. Service and
factory contacts are contained on the sticker.
Certification is based on the use of appropriately rated wire for the application. Installation shall be in accordance with
the current issue of the applicable national and or local electric code or regulations.
Table 3.3 – Required ratings for external wires
Up to Use wire rated at least
40°C Ambient 75°C
55°C Ambient 90°C
60°C and 65°C Ambient 1 105°C
Note 1: Refer to unit nameplate.
3.3.7 Network Installations
The Limitorque MX offers a number of network options: DDC-Modbus, Foundation Fieldbus H1, Profibus DP_V1,
Profibus PA, and DeviceNet.
Ensure that the network cable type is Belden 3074F, Belden 3105, Belden 9841 or another cable that is within 5% of the
following specifications.
• Nominal impedance: 120 ohms @ 1 MHz
• Line to shield capacitance: 23.0 pF/ft (75.5 pF/m)
• Line to line capacitance: 12.8 pF/ft (42.0 pF/m)
Using other cables may result in decrease of internodal distance and/or an increase in communication error.