User`s manual

User’s Manual 23
boards can be made to order in volume with the digital outputs pulled up to Vcc or +K, or
pulled down to GND. Contact your authorized Rabbit distributor or your Rabbit sales rep-
resentative for more information.
+K is an externally supplied voltage of 9–40 V DC used primarily in combination with
current sourcing outputs, and should be capable of delivering up to 2 A. Although a con-
nection to a +K supply is not absolutely required with sinking outputs, it is highly recom-
mended to protect against current spikes when driving inductive loads.
Connect the positive +K supply to pin 3 of screw-terminal header J3 and the negative side
of the supply to pin 12 of screw-terminal header J3. Exercise care to connect this supply
correctly because the +K inputs are not protected against reverse polarity, and serious
damage to the OP7200 may result if you connect this supply backwards.
When you are using the same DC power supply as the main power supply for the OP7200
and as the +K power supply, Rabbit recommends that you tie the -PWR connection to
ground. Since this step will bypass the reverse-polarity protection afforded by the full-
wave bridge rectifier, ensure that the positive leads from the power supply are connected
correctly to prevent damage to the OP7200.
Figure 10. +K, Power Supply, and Sample Load Connections
D23
D20
+PWR PWR +K OUT0 OUT1 OUT2 OUT3 OUT4 OUT5 OUT6 OUT7 GND
IN12 IN13 IN14 IN15 /RST TXC RXC TXD RXD 485 +485 GND
J10
J15
IN16 IN17 IN18 AIN0 AIN1 AIN2 AIN3 AIN4 AIN5 AIN6 AIN7 AGND
IN0 IN1 IN2 IN3 IN4 IN5 IN6 IN7 IN8 IN9 IN10 IN11
J2
J6
J3
J1
CAUTION: Disconnect power
before making or removing
terminal connections.
J2
J6
J3
J10
PROG
1
1
1
1
E-Net
R-Net
1
USR PWR
LNK ACT

+
Tie -PWR to GND
if using same
power supply for
OP7200 and +K
Connected to
Sinking
Output
Connected to
Sourcing
Output
Load
Load

External
+K Power
Supply
+
AC
Adapter
+PWR
-PWR
Connected to
Sinking
Output
Connected to
Sourcing
Output
OUT2
+K
GND
OUT5
Load
Load
3
6
9
12