Edwards SCU-350 Series

SCU-350 Series Control Unit for Turbomolecular Pump
MT-21E-201-E
Page 48
4
OPERATION
Table 9 shows the rated contacts for relays CR1, 3, 5, 7 to CR8 in Figure 29.
Resistance Load
(COS φ=1)
Induction Load
(COS φ=0.4)
(L/R=7 ms)
Rated load
250 V AC 10 A 250 V AC 5 A
30 V DC 10 A
Rated current 10 A
Maximum contact point
voltage
380 V AC
125 V DC
Maximum contact point current 10 A
Maximum open/close capacity
AC: 2,500 VA
DC: 300 W
AC: 1,250 VA
Minimum applicable load 5 V DC, 10 mA
Table 9 - Rated contacts for relays CR1, 3, 5, 7, 8
Table 10 shows the rated contacts for relays CR4 and 6 in Figure 29.
Resistance Load
(COS φ=1)
Induction Load
(COS φ=0.4)
(L/R=7 ms)
Rated load
250 V AC 8 A 250 V AC 3.5 A
30 V DC 8 A
Rated current 8 A
Maximum contact point
voltage
380 V AC
125 V DC
Maximum contact point current 8 A
Maximum open/close capacity
AC: 2,000 VA
DC: 240 W
AC: 875 VA
Minimum applicable load 5 V DC, 10 mA
Table 10 - Rated contacts for relays CR4, 6