EX213, 221, 230 & 233
Page 11
3. EX213 DIGITAL OUTPUT PANEL
Description
The EX213 is a 24 line digital output card with 24 Change Over contact relays, 24 Hi Current sourcing
open emitter outputs, or 8 TTL outputs, selected by the position of jumpers.
3.1 Relay/Logic Output Configuration
Relay or logic outputs can be selected by the position of jumpers J12 to J35. Logic outputs are given
on SK2, while relay outputs use SK7 and SK8. Details of the individual per bit Normally Open (N/O),
Normally Closed (N/C) and Common (COM) output configuration is labelled on the panel.
To select Logic output, ensure that J12 to J35 are configured as LOGIC as per the RELAY/LOGIC
OUTPUT CONFIGURATION diagram on the EX213. To set the entire board to relay output, set the
Jumpers across the pins next to the relays. For a logic output simply place the jumpers in the opposite
position. Any combination of logic and relay outputs is allowed.
3.2 Source Driver/TTL Output
Only selectable on Port or Block A of the card. To select TTL output on block A of the EX213s outputs,
set J4 to J11 to TTL OUTPUT as displayed on the panel. Alternatively, Block A can be set to output at
the same level as the source driver by setting J4 to J11 to SOURCE DRIVER OUTPUT, for this mode
set the Jumpers across the pins next to the relays. Any combination of output types is allowed. Relay
operation will only work in source driver mode.
Low/High Range
The EX213 outputs :
Isolated relay contact output mode
PPI Output = ‘0’
N/O contact open
PPI Output = ‘1’
N/O contact closed
High level logic output mode :
Output voltage low (PPI output = ‘0’)
+0.7V
Output voltage high (PPI output = ‘1’)
+23V
3.3 Power
The EX213 must be powered by an external 24V power supply, such as DR-4524 (Order Code 9604
8563). External power should be connected per channel to the EX213 via SK6, which is clearly
labelled as to the GND and VCC connections. It should be noted that the source driver chip could
source up to 100mA for 90% duty cycles on all 24 lines.
Jumpers J1 to J3 connect the logic ground of the computer to the grounds of the relay drivers. A
ground connection should be made for correct operation of the board, however J1-3 may be removed
if this creates a ground loop.
