Operation Manual for LCD Digital Readouts
Page 32 of 53
Advanced Keypad Input
This Function allows external activation of two keys on the
Advanced Key Pad.
IN1
maps a key to
IN2
(input 2).
This function is configured using
JUMPER JP
5
on the Readout circuit board must be set to
position
B
to enable external inputs.
The multi-purpose external connector on the General Purpose Readout
provides a direct connection to
IN1
(only). This allows for easy external
interfacing without modifying the case or soldering on the circuit board.
There are three solder pads on
both
Readout circuit boards, labeled
IN1,
IN2
and
GND
(the In-Panel readout connections are limited to circuit board solder
pads, no external connections.)
Any two of the Auxiliary keys may be mapped
to respond to an external input by programming Pr35 and Pr36 using the Key
Function Mapping Table below.
The inputs must be from a normally open “dry” (
no voltage applied
) switch,
connected between ground (
GND
or common) and
IN1
and/or
IN2
. The switch
input operates exactly the same as the mapped key providing both
Momentarily
and
Press and Hold
functionality.
CAUTION:. DO NOT APPLY VOLTAGE TO THESE INPUTS.
These inputs should only be switched from OPEN to GROUND.
Value of Pr 35 & 36
Mapped to Key
1
On/Off
2
Units
3
Plus
4
Datum
5
Minus
6
ABS/INC
7
Send
8
F1
9
F2
10
F3
11
F4
