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Note that the output terminals are rated at 15A maximum; if several outputs are operated in
parallel to source higher currents than this the junction should be made at a separate point, not
one of the terminals.
Ventilation
The power supply is very efficient but nevertheless can generate significant heat at full power.
The supply relies on convection cooling only and it is therefore important that ventilation is never
restricted if performance and safety are to be maintained.
Remote command format and the remote commands themselves are detailed in the Remote
Commands chapter.
Baud Rate Selection
The Baud rate is set by pressing the OPTION SELECT/OK button until
left-hand display; the right-hand display shows the current setting in the form of
Baud etc. Change the Baud rate by pressing the CHANGE button to step the rate through all the
possible options. When the required rate is displayed press OPTION SELECT/OK again to
confirm and exit the rate change mode.
Remote/Local Operation
At power on the instrument will be in the local state with the Rem (remote) lamp off. When a
command is received the remote state will be entered and the Rem lamp will be turned on. The
rotary controls are not locked out by this action and the instrument will be returned to the local
state if they are used; however, if the instrument receives another character from the interface,
the remote state will again be entered.
Local operation of the rotary controls, output On/Off switch and CHANGE button can be disabled
by pressing the OPTION SELECT/OK button until
right-hand display shows the current setting,
button selects
again to confirm and exit the change mode.
Local operation can be restored at any time by pressing the OPTION SELECT/OK button; if
has been set to
LoCL
local control and subsequent presses select the other modes as described above.
RS232 Connector
The 9-way D-type serial interface connector is located on the instrument rear panel. The pin
connections are as shown below:
Pin
1
2
3
4
5
6
7
8
9
Connect to a PC with a cable which has pins 2, 3, 5, wired plus pins 1, 4, 6 and pins 7 and 8,
linked at the PC end, see diagram.
8
on
or
oFF
; when the required setting is displayed press OPTION SELECT/OK
the first press of OPTION SELECT/OK returns the instrument to
oFF
Name
Description
DCD
Linked to pins 4 and 6
TXD
Transmitted data from instrument
RXD
Received data to instrument
DTR
Linked to pins 1 and 6
GND
Signal ground
DSR
Linked to pins 1 and 4
RTS
Linked to pin 8
CTS
Linked to pin 7
-
No internal connection
Remote Operation
appears in the left-hand display; the
LoCL
or
. Alternate presses of the CHANGE
on
oFF
appears in the
bAUd
960
for 9600
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