2  Introduction 
1.3  Operating Limits* 
 
Model 8712 Power input voltage (+V IN)  10 V  16 V 
Model 8703 Power input voltage (+V IN)  10 V  12 V 
Continuous pulse rate in 55 ºC still air  9.5 Hz  1 kHz 
Ambient still-air operating temperature  0 °C  65 °C 
Storage temperature (non-operating)  -40 °C  95 °C 
Voltage on optically coupled output  0 V  5 V 
Input voltage on optically isolated inputs  0 V  6.0V 
Analog input voltage** 
(ANALOG IN–, ANALOG IN+) 
-10 V  +10 V 
Current into optically coupled input    10 mA 
 
*Operating outside the operating limits may damage the unit. 
**The magnitude of the analog input voltage must be less than the power supply input 
voltage.