Edwards SCU-1601

SCU-1601 Control Unit for Turbomolecular Pump
MT-96E-1B1-0
Page 66
4
OPERATION
Table 12 shows the rated contacts for relays CR1 to CR9 in Figure 37.
Resistance Load (COS Ø=1)
Rated Load
125 VAC, 0.5 A
24 VDC, 1 A
Rated Current
2 A
Maximum Contact Point Current
1 A
Maximum Open/Close Capacity
AC: 62.5 VA
DC: 30 W
Minimum Applicable Load
5 VDC, 1 mA
Table 12 - Rated contacts for relays CR1 to CR9
4.5.3 Remote setting
The parallel port (X7 REMOTE) and serial port COM1 (REMOTE X3A/X3B), serial port COM2 (X7
REMOTE) and STP-LINK (X8) are fitted as standard. For the setting method of remote operation
hardware, refer to Section 3.11.
This section details the operating method using the parallel port (X7 REMOTE), refer to Figure 23, "X7
REMOTE connector" for details of pin location. For the operating method using the serial port, refer to
Section 5 and Section 6.
4.5.4 Starting/Stopping the STP pump
There are two methods for the starting/stopping operation with the parallel port (X7 REMOTE). 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 13 - Starting/Stopping the STP pump during remote operation (X7 REMOTE)