Table 2.8 Control Circuit Terminals (Continued) * 1. For a 3-wire sequence, the default settings are a 3-wire sequence for S5, multi-step speed setting 1 for S6 and multi-step speed setting 2 for S7. * 2. When driving a reactive load such as a relay coil, always insert a flywheel diode as shown in Fig 2.17 . * 3. Use the photocoupler outputs when the minimum permissible load is 5 VDC or less and 10 mA or less. Flywheel diode External power: 48 V max Coil 50 mA max The rating of the flywheel diode must be at least as high as the circuit voltage. Fig 2.17 Flywheel Diode Connection 2 -18 Type No. Signal Name Function Signal Level Photo- coupler outputs P1 Multi-Function PHC Output 1 Default:
Zero-speed Zero-speed level (b2-01) or below when on. 50 mA max at 48 VDC*2 P2 Multi-Function PHC Output 2 Default: Frequency agreement detection Frequency within 2 Hz of set frequency when on. PC Photocoupler output common for P1 and P2 - P3 Multi-Function PHC Output 3 Default: Ready for operation when on. C3 P4 Multi-Function PHC output 4 Default: FOUT frequency detected when on. C4 Relay outputs MA Fault Output Signal (NO con- tact) Fault when CLOSED across MA and MC Fault when OPEN across MB and MC Dry contacts Contact capacity: 10 mA min. 1 A max at 250 VAC 10 mA min. 1 A max at 30 VDC Minimum permissible load:
5 VDC, 10 mA*4 MB Fault Output Signal (NC con- tact) MC Relay contact output com- mon - M1 Multi-function contact output (NO contact) Default: Operating Operating when on across M1 and M2. M2 Analog moni- tor out- puts FM Multi-Function Analog Mon- itor 1 Default: Output frequency 0 to 10 V/100% frequency 0 to +10 VDC ±5% 2 mA max AM Multi-Function Analog Mon- itor 2 Default: Current monitor 5 V/MxC rated current AC Analog common - RS- 485/ 422 R+ MEMOBUS Communica- tions Input For 2-wire RS-485, short R+ and S+ as well as R- and S-.
Differential input, photo- coupler isolation R- S+ MEMOBUS Communica- tions Output Differential output, pho- tocoupler isolation S- IG Communications shield wire - -