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Ad668 – Toshiba SX 2000 User Manual

Page 108

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2.3 I/O Module Specification

AD668

m

AD668

Item

Module type

Input type

Input range

Bipolar

Unipolar

Input impedance

Number of input channels

Resolution

Overall accuracy

(0 to 55°C)

Temperature drift

Conversion cycle

Insulation resistance

Withstand voltage

Special functions

External power supply

Current

consumption

Internal logic

External

power supply

External connection

Weight

Specification

AD668

Voltage input Current input

-5 to +5V

-10to+10V

0 to +5V

0to+10V

1 to +5V

1MQ or more

0 to 20mA

4 to 20mA

250Q

Schannels per module

16 bits

±0.2%/FS (25°C)

±0.5%/FS (0 to 55°C)

(FS :±10V)

±100ppm/°C or less

Approx. 1 ms/channel (Approx.8ms/8channels)

10MQor more

1500Vac 1 minute : between internal and external, between

analog input and FG/LG

Gain and offset adjust function

Average value processing function

Unassigned channel skip function

External 24V power supply voltage drop error detection

24Vdc±10%

5Vdc (300mA)

24Vdc (120mA)

20-point removable terminal block

Approx. 300g

Circuit Corfiguration

Terminal Connections

CH1

CH2

CH3

CH4

CHS lOCX|3

CH6

CH7 -íDOClo —

CH8

tdoch

; o

OC24V
(120mA)

l

G|

F(

g

|—[o ■

o

-o

Isolate external power

o

supply line (24Vdc)

o

from other signal lines.

o

o

o

Use shielded twisted-

G

pair cables for analog

O

signals, and ground the

O

shields securely.

6F8C0926

91

CH8