Potentiometer Analogue Input Specifications; Interrupt Input Specifications; Backup; Expansion - Hitachi HIDIC MICRO-EH Applications Manual

3.3.8

Potentiometer Analogue Input Specifications

Number of potentiometer inputs
Stored in
Input range
Resolution
Input filter
3.3.9

Interrupt Input Specifications

Input that can be used
Input voltage ON
OFF

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
9,000
* 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.
Chapter 3 Function and Performance Specifications
2
Ch.1 : WRF03E, Ch.2 WRF03F
0-1023 (H0-H3FF)
10 bits
By user settings
X1, X3, X5, X7 (by user settings)
15 V
5 V
Actual value (Max.) @25°C
18,000
3-14