EX213, 221, 230 & 233
Page 13
4. EX230
DIGITAL INPUT PANEL
The EX230 is a 24 line digital input card with jumper selectable options for nominal 5 or 24 volt input
operation with or without opto-isolation on the inputs. It is part of the Amplicon 200 Series, and is
designed for use in conjunction with the EX233 and our 200 Series range of Digital I/O and Counter
Timer products.
4.1 Opto-isolation
To select opto-isolation on the EX230s inputs set J31 to J54 to OPTO-ISOLATED INPUT MODE as
displayed on the panel. Opto-isolation is selected per bit, any combination of isolated and non-
isolated inputs are allowed.
4.2 Volt free contact input
To select a Volt free contact input, set J31 to J54 to LOGIC LEVEL INPUT this allows the input to float
up to +5 Volts supplied from VCC. This input can then be pulled to ground by an external contact
closure. This mode can also be used as a buffered TTL level logic input to the 200 Series cards.
4.3 Low/High Range
The EX230 can operate within the following voltage ranges:-
Opto-isolated input mode :
Low Range
J7- J30 Inserted
High Range
J7- J30 Removed
Input Signal low (‘0’ at PPI input)
-5V to +1.5V
-15V to +2.0V
Input Signal high (‘1’ at PPI input)
+4.0V to +20V
+10V to +50V
Volt free contact input mode :
Input Signal low (‘0’ at PPI input)
-1V to +1.5V
Input Signal high (‘1’ at PPI input)
+2.0V to +5.0V
Low range is selected when jumpers J7 to J30 are fitted, high range is selected when J7 to J30 have
been removed.
Low/High range can be individually selected for each bit, and any combination of the two ranges is
allowed.
Light Emitting Diodes D1 – D24 indicate status of the input.
Please note that negative logic applies to the volt free contact settings.
4.4 Power
The EX230 can be powered in two different ways. It can either be powered from the PC via the Digital
I/O Counter Timer board and the EX233 distribution panel, or it can be powered from an external
power supply, such as a DR-4524 (Order Code 9604 8563).
If J1 to J6 are fitted, power is provided from the PC. However, if jumpers J1 to J6 are removed, power
must be provided from an external power supply. External power must be connected per channel to
the EX230 via SK5, which is clearly labelled as to the GND and VCC connections. It should be noted
that a ground return path must be completed for the card to function correctly, and recommend that
the unit is powered from the computer supply.
