SCU-1600 Control Unit for Turbomolecular Pump
March 10 66 Issue 1-a
5
SERIAL COMMUNICATION PROTOCOL
Figure 34 - Connector X3A/X3B (D-sub 9)
Note: The connectors X3A and X3B are fitted using M2.6 screws.
Note: It is recommended to use a communication cable with shield type, and connect both terminals
to the ground.
RS232 and RS485 cannot be used at the same time. The factory setting is RS232. When connecting
RS485, the change of communication parameter setting is required, refer to Section 3.11.
When connecting RS232, the length of the communication cable should be 15 m or less. When
connecting RS485, refer to Section 5.2.2.
2. Serial Port COM2 (exclusively used in the RS485)
Connect D+/D- to connector X7 on the rear panel (D-Sub 37pin, socket) according to Table 18. Other
pins are reserved for Input/Output remote function, accordingly, there is no connection to these pins.
Refer to Section 5.2.2.
X7
(D-Sub 37 pin, socket)
36 (D+) RS485
18 (D-)
Table 18 - X7 pin position
Figure 35 - Connector X7 (D-sub 37)
Note: The connector X7 is fitted using M2.6 screws.
(19) (18) (2) (1)
(37) (36)
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(21) (20)
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