User`s manual
BL1600 System Development s 31
The OUTB1OUTB8 and SCL sig-
nals are carried on header H2 as
shown in Figure 4-3.
Seven of the digital outputs
(OUT1OUT6 and EN485) feed
the high-current driver, providing
seven high-current outputs (HC1
HC7) suitable for driving relays, so-
lenoids, or lamps. The high-current
outputs are available on header J2
as shown in Figure4-4.
Figure 4-4. BL1600 Header J2 Pinout
Each high-current output includes a protective diode that can return
inductive spikes to the power supply. The diodes use a common bus (K).
Sinking drivers are the factory default. Sourcing drivers may also be used.
Both can be seated in the same 18-pin socket.
See Appendix D, Sinking and Sourcing Drivers, for more
information on using or changing between sinking and
sourcing driver chips.
OUTB7
OUT1
OUT3
OUT5
EN485
OUTB1
OUTB3
OUTB5
1
3
5
7
9
11
13
15
17
19
2
4
6
8
10
12
14
16
18
20
H2
GND
OUTB8
OUT2
OUT4
OUT6
SCL
GND
OUTB2
OUTB4
OUTB6
+5 V
+5 V
Figure 4-3. BL1600 Digital Outputs
Header H2 Pinout
DCIN
K
HC7
HC6
HC5
HC4
HC3
HC2
HC1
RS485+
RS485
GND
High-current
outputs
J2
$