California Instruments MX30-1 - Remote Inhibit; Remote Shutdown; Table 3-15: Remote Inhibit Mode Settings

User Manual – Rev AJ California Instruments
3.12 Remote Inhibit / Remote Shutdown
It may be necessary to provide a remote shutdown of the AC or DC output of the MX. The
external remote inhibit input may be used for this purpose (RI). This input is also referred to as
remote shutdown.
The default mode of operation for the RI input is a contact closure between pins 5 and 6 (return
of the rear panel screw-terminal strip. This will open the output relay of the MX.
If the firmware revision of the MX is 0.28 or higher, it is possible to reverse the polarity o
input. This requires the use of the following bus command:
OUTPut:RI[:LEVel] HIGH /* Sets RI polarity to active high.
)
f the RI
in effect. On units with firmware rev 0.27 or lower, this input level mode selection is not
I
utput
y
The way the MX responds to a remote inhibit event can be programmed over the remote control
interface using the OUT ramming manual for details
on changing modes. The mode set is retained at power off and recalled at power up so stays in
er the bus.
T re sup
OUTPut:RI[:LEVel] LOW /* Sets RI polarity to active low (Factory default)
The remote control interface must be used to change this setting. Once set, the polarity setting
remains
available.
MX Series
When set to HIGH, an active low TTL level or a contact closure is required to enable the o
relay of the MX. Opening the contact or removing the low input signal will cause the output rela
to open.
MX Series II
P:RI:MODE command. See 7003-961 prog
effect till changed again ov
he following modes a ported.
MODE OPERATION
LATCHING A TTL
protec
low at the RI input latches the output in the
tion shutdown state. This state can only be
cleared by sending a OUTPut:PROTection:CLEar
command over the bus.
LIVE The output state follows the state of the RI input. A TTL
low or contact closure at the RI input turns the output
off; a TTL high or open contact turns the output on.
This mode is equivalent to using the Output On/Off
button on the front panel.
Default mode. Units are shipped in this mode.
OFF The instrument ignores the RI input.
Table 3-15: Remote Inhibit Mode Settings
nhibit input, it will be necessary to disconnect any RI NOTE: When using the Remote I
connection to the MX master unit when turning on the MX master unit. During
initialization, the RI connection must be
OPEN or initializatio
the message WARING FOR AUXILIARY displayed on the LC
n will be halted with
D screen.
70 MX Series