Chapter 3 Function and Performance Specifications

3.3.8 Potentiometer Analogue Input Specifications

Number of potentiometer inputs

2

Stored in

Ch.1 : WRF03E, Ch.2 WRF03F

Input range

0-1023 (H0-H3FF)

Resolution

10 bits

Input filter

By user settings

3.3.9 Interrupt Input Specifications

Input that can be used

X1, X3, X5, X7 (by user settings)

Input voltage

ON

15 V

 

OFF

5 V

3.3.10 Backup

(1)Battery

Data memory (retentive area) can be kept by EH-MBAT battery as below.

Battery life time (total power off time) [Hr] *

Guaranteed value (Min.) @55°C

Actual value (Max.) @25°C

9,000

18,000

* Battery life time has been changed since Oct. 2002 production (MFG NO.02Jxx) due to hardware modification.

Battery can be mounted inside of front cover.

Battery is available only for 23-point and 28-point types.

If the calendar clock function is used with the 23-point or 28-point type, be sure to use the battery.

(2)Capacitor

14-point type: Data can be kept for 72 hours (at 25 °C) by the capacitor.

23 and 28-point types: Data can be kept for 24 hours (at 25 °C) by the capacitor. Please note that data memory of 10 point type cannot be retained.

3.3.11 Expansion

Up to 4 times of expansion units can be installed.

14 points and 28 points digital units, and 4ch. input / 2 ch. output analog expansion units available.

A cable with a length of up to 1 m can be used to connect between units.

The total extension cable length can be up to 2 m (from the basic unit to the expansion unit at the end).

The 10-point type unit cannot be expanded.

3-14

Page 30
Image 30
Hitachi NJI-350B manual Potentiometer Analogue Input Specifications, Interrupt Input Specifications, Backup, Expansion