STP-301/451 Series Instruction Manual
Operation
8
Remote Input/Output Signal Terminal Blocks
8.1
I/O TB1 Terminal Block
This is a terminal block for remote output signals. Use it in accordance with Table 8.1
and Figure 8.1. This terminal block functions in both the MANUAL and REMOTE
operations.
The screw for the term inal is M3.5
*1
.
Five abbreviations are used in the following table:
N.O: Normal Open
N.C: Normal Close
COM: Common
IN: Input Terminal OUT: Output Terminal
◇
When connecting the pow er supply for the air cooling unit to terminals (1)-(4),
attach a metallic cover or a similar part to the terminal block to ensure the safety.
Table 8.1 I/O TB1 Terminal Block
Terminal Description
AC.POWER
N1 IN L1
(1)
(2)
Terminals for inputting power for driving the air cooling
unit. The voltage input to these terminals is output to the
specified terminal block through operation of the STP
pump.
FAN
N.O OUT
(4)
(3 )
Terminals for connecting the air cooling unit.
The voltage input to AC. POWER terminals ((1)-(2)) is
output to these terminals when the STP pump is in
acceleration or rated operation.
The voltage is cut OFF when the STP pump is under the
BRAKE state (see Section 5.2.2, "Air Cooling Method").
(6)
(5)
Not-used.
DO NOT use these terminals.
POW ER
N.O OUT
(8)
(7)
Terminals for outputting the POWER ON state signal.
These terminals are closed when the magnetic bearing
functions and the rotor levitates.
This signal is cut OFF at a power failure.
COM
N.O
N.C
ALARM
OUT
(9)
(10)
(11)
Terminals for outputting the ALARM signal.
When an abnormality/error is detected under the POWER
ON state, the terminals between (10)-(9) are closed, and the
terminals between (10)-(11) are opened.
However, when the rotational speed is less than 20,000rpm
during power failure backup operation, this signal is not
output.
*1
: JIS
