A
2401 Stanwell Drive Concord, California 94520 Ph: 925/687-4411 or 800/542-3355 Fax: 925/687-3333 www.calex.com Email: sales@calex.com
1
2/2002
Models 8501, 8502
Two Channel TTL/24V & 24V/TTL Converters
+
-
+
-
C
E
C
E
+5 VOLT LOGIC SUPPLY
TTL SIGNAL SUPPLY
SIGNAL SOURCE MUST BE ABLE TO
SINK 7 TO 8 mA IN LOW STATE
DC TO 15KHz
CHANNEL 1
CHANNEL 2
382
PLC 24 V - 7 mA DC INPUT
SINK OR SOURCE CONNECTION
-24V
+24V
3K
CALEX 8501
MODEL 8501
TTL 5 VOLT LOGIC TO PLC 24 VOLT INPUT
MODEL 8502
PLC 24 VOLT PULSE OUTPUT TO TTL 5 VOLT LOGIC
Model 8501 is a two channel converter, 5V to 24V. The two
independent channels require 7mA into 382 ohms to provide
a 7 mA output into the 3K, 24 volt typical PLC logic inputs.
They may be driven by standard or H series TTL logic, or with
an open collector NPN transistor. Note that low power TTL
logic will not drive this unit. The output is a floating optocoupler
NPN transistor which may be connected in either source or
sink configuration. The input frequency range is DC to 15KHz.
Model 8502 is a two channel converter, 24V to 5V. Each
channel requires 7mA into 2.5K ohms to provide a 5 mA
CALEX 8502
l
e
d
o
M
1
0
5
8
2
0
5
8
e
g
a
t
l
o
V
l
a
n
g
i
S
t
u
p
n
I
m
u
m
i
n
i
M
s
t
l
o
V
5
.
4
m
u
m
i
x
a
M
s
t
l
o
V
0
1
m
u
m
i
n
i
M
s
t
l
o
V
2
2
m
u
m
i
x
a
M
s
t
l
o
V
0
3
e
c
n
a
t
s
i
s
e
R
t
u
p
n
I
l
a
c
i
p
y
T
s
m
h
O
2
8
3
l
a
c
i
p
y
T
s
m
h
O
K
5
.
2
y
c
n
e
u
q
e
r
F
t
u
p
n
I
z
H
K
5
1
o
t
C
D
z
H
K
0
2
o
t
C
D
t
n
e
r
r
u
C
t
u
p
t
u
O
m
u
m
i
n
i
M
A
m
6
m
u
m
i
x
a
M
A
m
5
1
m
u
m
i
n
i
M
A
m
5
d
e
t
r
e
v
n
I
s
i
t
u
p
t
u
O
e
g
a
t
l
o
V
e
c
r
u
o
S
t
u
p
t
u
O
e
t
a
t
S
f
f
O
m
u
m
i
x
a
M
s
t
l
o
V
0
3
y
l
p
p
u
S
c
i
g
o
L
t
l
o
V
5
m
u
m
i
x
a
M
s
t
l
o
V
7
t
n
e
m
n
o
r
i
v
n
E
g
n
i
t
a
r
e
p
O
C
5
5
+
o
t
C
0
e
g
a
r
o
t
S
C
0
8
+
o
t
C
0
4
-
e
z
i
S
)
m
m
6
9
x
7
2
x
2
4
(
L
"
8
7
.
3
x
W
"
6
0
.
1
x
H
"
5
6
.
1
t
h
g
i
e
W
)
s
m
a
r
g
2
4
1
(
.
z
o
5
)
g
n
i
d
n
e
p
(
s
l
a
v
o
r
p
p
A
y
c
n
e
g
A
4
0
6
1
L
U
,
8
0
5
L
U
sinking output to TTL 5 Volt Logic. The output is an optocoupler
NPN transistor collector and requires the 5 Volt logic supply
and its return. The input frequency range is DC to 20KHz.
A typical application is the direction and step control of a
Stepper Motor by PLC 24 Volt high speed outputs, where the
motor controller requires 5 Volt logic signal levels.
The inputs are isolated by optocouplers and are protected
from ESD by Varistors. The 2 outputs have a common emitter
with each output collector capable of sinking a minimum of
5 mA.
PDF 
ZIP