Chapter  2  Specifications  and System Configuration 
2-53 
2.7  6BSpecifications for Analog Input/Output Modules 
2.7.1  27BGeneral Specifications 
  AH04AD-5A/AH08AD-5A/AH08AD-5B/AH08AD-5C 
Electrical specifications 
Analog-to-digital 
Voltage input/ 
Voltage input/ 
Voltage input  Current input 
24 VDC (20.4 VDC~28.8 VDC) (-15%~+20%) 
Isolation 
An analog circuit is isolated from a digital circuit by a digital 
optocoupler, but the analog channels are not isolated from one another. 
Isolation between a digital circuit and a ground: 500 VDC 
Isolation between an analog circuit and a ground: 500 VDC 
Isolation between an analog circuit and a digital circuit: 500 VDC 
Isolation between the 24 VDC and a ground: 500 VDC 
 
Functional specifications 
Analog-to-digital 
Voltage input 
Hardware input 
-10.1 V~10.1 V  -0.1 V~10.1 V  -5.05 V~5.05 V  -0.05 V~5.05 V  0.95 V~5.05 V 
(Room 
±0.1% 
Fiducial error 
(Full temperature 
±0.45% 
(Room 
±0.07% 
Linearity error 
(Full temperature 
±0.12% 
16 bits 
±15 V 
 
Analog-to-digital 
Current input 
Hardware input 
-20.2 mA~20.2 mA  -0.2 mA~20.2 mA  3.8 mA~20.2 mA 
(Room 
±0.1% 
(Full temperature 
±0.2%