7
2.3 Rear Panel
Figure 2 shows the layout of the rear panel which contains the ANALOG
INTERFACE and OUTPUT connectors, a REMOTE/ LOCAL switch, the
sensor select switch, GAIN ADJUST screw, and the AC power inlet.
ANALOG
INTERFACE
OUTPUT
1,2
3,4
5
6
7
8
TE (+)
TE (–)
TE SHIELD
SENSOR SHIELD
SENSOR (+)
SENSOR (–)
GAIN
ADJUST
REMOTE
LOCAL
115/230, 2A/1A, 60/50 Hz
250V, 3AG, SLO-BLOW
MADE IN U.S.A.
CAUTION: DO NOT REMOVE COVER, REFER SERVICING TO QUALIFIED
PERSONNEL. DISCONNECT INPUT POWER BEFORE REPLACING FUSE
OFF
ON
OFF
ON
SENSOR SELECT
100µA10µA LM335 AD590
OFF
OFF
ON
OFF
OFF
ON
ON
ON
115V
Figure 2: Rear panel layout.
2.3.1 Analog Interface
Model 325AN and 350AN include a Analog Interface card, located at the far
left of the rear panel. A 15-pin, high density, D-sub connector is used for
the input and output lines. Above the connector is the REMOTE/LOCAL
switch used to activate the set-point control line which is disabled in the
LOCAL mode. The status lines are always available whether the REMOTE
or LOCAL mode is selected.
How To Use The Analog Interface
The Analog Interface may be used with chart recorders, X-Y recorders or
can be operated via a computer using a multiple function I/O card such as
the National Instruments LAB-PC data acquisition card. One data acquisi-
tion card will control two Model 300 temperature controller units or one
Model 300 and one Model 500 laser diode driver unit. The Output Set-point
is set using one of the analog outputs from the data acquisition card. Other
TTL signals of the Analog Interface card are controlled by the digital I/O
lines. R/T Monitor data, such as temperature, is then acquired using the
analog input line of the data acquisition card.
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