Edwards SCU-801

SCU-801 Control Unit for Turbomolecular Pump
MT-95E-001-A
Page 56
4
OPERATION
Table 11 shows the rated contacts for relays CR1 to CR10 in Figure 33.
Resistance Load (COS Ø=1)
Rated Load
30 VDC, 2 A
Rated Current
2 A
Maximum Contact Point Current
2 A
Maximum Open/Close Capacity
DC: 60 W
Minimum Applicable Load
10 mVDC, 10 μA
Table 11 - Rated contacts for relays CR1 to CR10
Note: Compatible with previous model, VAC (125VAC, 0.5A) can be used. However, when used with
VAC, NRTL approval(ETL approval) is not applicable.
4.5.3 Remote setting
The parallel port (REMOTE X7) and serial port COM1 (REMOTE X3A/X3B), serial port COM2
(REMOTE X6) and STP-Link (X8) are fitted as standard. The network terminal such as the Lon or the
Devicenet is available as options.
It is necessary to set the hardware for the remote operation first. See Section 3.11, "Parameter set
mode" for information and methods.
This section details the operating method using the parallel port (REMOTE X7), refer to Figure 19,
"REMOTE X7 connector" for details of pin location. For the operating method using the serial port, refer
to Section 5 and Section 5.
4.5.4 Starting/Stopping the STP pump
There are two methods for the starting/stopping operation with the parallel port (REMOTE X7). Use
one of them.
Method
Starting the pump
Stopping the pump
1
1) Short the circuit between (1)-(21).
2) Short the circuit between (3)-(21) for 0.3
seconds or more. However, when inputting this
signal simultaneously with switching "ON" the
breaker on the rear panel, short the circuit
between (3)-(21) for 10 seconds or more.
Open the circuit between (1)-(21).
2
Short the circuit between (1)-(3).
In this case, (21) is not used.
Open the circuit between (1)-(3).
Table 12 - Starting/Stopping the STP pump during remote operation (REMOTE X7)