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3 - Installation
NOTE: Connectors
are removable
INH
FLT
. . . .
+ - +
Controller Connections
The dc source can be controlled either through an HP-IB or an RS-232 interface.
HP-IB Interface
Each dc source has its own HP-IB bus address, which can be set using the front panel
described in chapter 5. HP-IB address data is stored in non-volatile memory. The dc source is shipped
with its HP-IB address set to 5.
Dc sources may be connected to the HP-IB interface in series configuration, star configuration, or a
combination of the two, provided the following rules are observed:
The total number of devices including the controller is no more than 15.
♦
♦
The total length of all cables used is no more than 2 meters times the number of devices connected
together, up to a maximum of 20 meters. (Refer to table 2-2 for a list of HP-IB cables available from
Hewlett-Packard.)
♦
Do not stack more than three connector blocks together on any HP-IB connector.
Make sure all connectors are fully seated and the lock screws are firmly finger-tightened.
♦
RS-232 Interface
The dc source has an RS-232 programming interface, which is activated by commands located in the
front panel
menu. All SCPI and COMPatibility commands are available through RS-232
Address
programming. When the RS-232 interface is selected, the HP-IB interface is disabled.
26
+16.5V Max.
Coil Current
0.25A Max.
Relay Driver
Ports 0, 1, 2
(contains internal
clamp diodes for
inductive flyback)
4 3 2 1
A) Relay Circuits
Figure 3-7. Digital I/O Examples
Digital Output
Ports 0, 1, 2
TTL, AS, CMOS, HC
Digital Input
Port 2
B) Digital Interface Circuits
key as
Address
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