8
Analog Interface Connections
Pin # Designation Function
1 ON/OFF TTL momentary low toggles output on/off
2 ENABLE TTL low = remote level control enabled*
3 STATUS TTL low = output on
4 LIMIT TTL low = output limiting
5 ERROR TTL low = output error
6 MODE TTL low = R/T, TTL high = I
TE
7 DGND Digital Common for TTL signals
8 EGND Earth Ground for shielding TTL signals
9 LEVEL (+) Input signal for level control (charts below)*
10 LEVEL (−) Input signal DC Common
11 ANALOG OUT DC output voltage for actual R/T (chart below)
12 AGND DC Common for Analog Output
13 - Not Used
14 - Not Used
15 EGND Earth ground for shielding analog signals
* Front panel control knob is bypassed
External Level Input, V
DC
(Pin 9 With Respect To Pin 10)
R/T MODE
Range Input Voltage Level Corresponding R/T Value
100µA 0 to 2V 0 to 20 kΩ
10µA 0 to 2V 0 to 200 kΩ
AD590 −0.50V to +1.50V −50.0°C to +150°C
LM335 −0.50V to +1.50V −50.0°C to +150°C
I
TE
MODE
Model Input Voltage Level Output Current Level
325/325AN −250 mV to +250 mV −2.50 A to +2.50 A
350/350AN −500 mV to +500 mV −5.00 A to +5.00 A
Analog Output Level, V
DC
(Pin 11 With Respect To Pin 12)
R/T or I
TE
MODE
Range Output Voltage Level Corresponding R/T Value
100µA 0 to 2V 0 to 20 kΩ
10µA 0 to 2V 0 to 200 kΩ
AD590 −0.50V to +1.50V −50.0°C to +150°C
LM335 −0.50V to +1.50V −50.0°C to +150°C
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