ferrotec Temescal CV-12SLX User Manual page 35

Section 2: Installation
Table 2-2 Descriptions of I/Os Exchanged via FPS Rear Panel
Signal Name
CONTROL POWER COMMON
REQUEST SIGNALS COMMON
MONITOR SIGNALS COMMON
GUN FILAMENT OK
REMOTE BIAS SET SELECT
GUN ENABLE/OFF COMMAND IN
GUN READY INDICATOR
24VDC CONTROL POWER
EMISSION I MONITOR
REMOTE EMISSION I
SETPOINT IN
REMOTE FILAMENT I
MONITOR OUT
REMOTE FILAMENT I
SETPOINT IN
AUTOBIAS DONE INDICATOR
GUN IS ON INDICATOR
GUN GO ON COMMAND IN
0101-8292-0, Rev. C
Connector J101 and the FPS I/O Cable (PN 0620-6672-2)
Pin I/O Type Description
1 Common for +24 V dc return for the following digital outputs: GUN FILAMENT OK (Pin 4),
digital outputs GUN READY INDICATOR (Pin 7), and GUN IS ON INDICATOR (Pin 14).
2 Common for Common for the following analog request inputs: REMOTE EMISSION I
analog inputs SETPOINT IN (Pin 10) and REMOTE FILAMENT I SETPOINT IN (Pin 12).
3 Common for Common for the following analog outputs: EMISSION I MONITOR OUT (Pin
analog outputs 9) and FILAMENT I MONITOR OUT (Pin 11).
4 Digital output When high (+ 24 V dc), this output indicates that the gun's filament current
is flowing (i.e., that the filament is not broken and that the electrical path to
it from the FPS is not shorted to ground).
5 Digital input If this input is high, then the bias current setpoint is determined by the
REMOTE FILAMENT I SETPOINT IN input supplied via Pin 12, and the FPS's
internal Autobias circuit is disabled. The default is to set this input high by
connecting it to Pin 8. To determine whether the internal autobias circuit will
produce better results for your application, consult Temescal.
6 Digital input Connect to Pin 8 via a normally closed external switch. When this input is
high, then the gun (i.e., filament current) is OFF, and the GUN READY
INDICATOR signal goes true. When the gun is ON, momentary loss of the
GUN ENABLE/OFF COMMAND IN contact closure switches the gun OFF. For
maximum equipment protection, wire an additional set of system interlock
switches in series with those wired into the REMOTE INTERLOCKS loop for
the high voltage (see Pins 24 and 25 in Figure 2-16). NOTE: The minimum
safety requirement is a DOORS interlock switch installed before the normally
closed switch required between J101 Pins 6 and 8.
7 Digital output This output goes high (+24 V dc) when the GUN ENABLE/OFF COMMAND IN
signal is high.
8 DC voltage + 24 dc output supplied for the following inputs: REMOTE BIAS SELECT (Pin
5), GUN ENABLE/OFF COMMAND IN (Pin 6), and GUN GO ON COMMAND IN
(Pin 15). NOTE: To be used only for power supply control; do NOT use this
voltage to drive any external device.
9 Analog output 0-10 V dc output, linear. Scaling of this output depends on position of the
EMISSION CURRENT SELECT switch on the FPS front panel (see Figure 4-2),
which is factory set to 1500 mA for the CV-12SLX. Therefore, scaling of the
EMISSION CURRENT I MONITOR output is 0-10 V dc = 0-1500 mA.
10 Analog input 0-10 V dc input, linear. Scaling of this input depends on the position of the
EMISSION CURRENT SELECT switch on the FPS front panel, which is factory
set to 1500 mA. Therefore, scaling of the REMOTE EMISSION I SETPOINT IN
input is 0-10 V dc = 0-1500 mA.
11 Analog output 0-10 V dc output, linear. Scaling of this output is 0-10 V dc = 0-100 A for –0
and –1 FPS units. For FPS units whose PN ends in –2, scaling is 0-10 V dc =
0-50 A.
12 Analog input 0-10 V dc input, linear. Connect to Pin 2. If the REMOTE BIAS SET SELECT
input (Pin 5) is high, then this input controls the filament current's bias
setting. Scaling is 0-10 V dc = 0-100 A for –0 and –1 FPS units. For FPS units
whose PN ends in –2, scaling is 0-10 V dc = 0-50 A.
13 Digital output If the REMOTE BIAS SET SELECT input (Pin 5) is low, then the FPS autobias
circuit controls the bias current setpoint. In that case, the AUTOBIAS DONE
INDICATOR goes high after the FPS autobias sequence is completed.
14 Digital output When high, this output indicates that the gun is ON.
15 Digital input Connect to Pin 8 via a normally open contact closure. If the GUN
ENABLE/OFF COMMAND IN signal (Pin 6) is high, then momentary closure of
this contact switches the gun ON.
2-19
2.6 Cable Installation
CV-12SLX User Manual