ZWorld PK2100 Series, Руководство пользователя

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PK2100 Series
Z-World 530-757-3737 3
The Interface
A
PK2100 S
eries controller has the following as its interface:
1
Six universal inputs. Universal inputs can be used as
(
A
) digital inputs. With a single threshold (in software or
hardware) the input channel yields a digital
1
when the input
voltage is above threshold and
0
otherwise.
(
B
) digital inputs with two thresholds. Z-
W
orld software re-
turns a digital
1
when the input voltage is above a high
threshold, a
0
when voltage is below a low threshold, and re-
ports ‘no change’ otherwise. It is a simple and logical exten-
sion to write software that handles several thresholds. Thus,
the universal inputs can be used as...
(
C
) analog inputs (with Z-
W
orld software).
The universal inputs accept
0
–
10V
with
10
-bit resolution,
and are protected against overloads in the range
±
48
volts.
2
One high-sensitivity (high-gain) differential analog input.
Normally, the high-gain input range is
0
–
1
volt, but you can
change resistors (
R5
,
R11
,
RP5
) on the operational amplifier.
It has
10
-bit resolution.
If you don’t use the high-gain channel, a seventh universal
input is available.
3
Seven protected digital inputs, with a
2
.
5
volt threshold.
Three of the inputs also function as counter inputs.
4
Two counter channels capable of counting pulses at up to
600
k
H
z or more. The counter inputs can also be used to
measure pulse width and other pulse timing characteristics.
The counters use
DMA
hardware.
5
Two on-board relays, rated for
3A
at
48V
, with
NO
,
NC
, and
COM
terminals for each. You can install
MOV
s to protect re-
lay contacts.
6
Ten high-current outputs suitable for driving relays or sole-
noids. These outputs can sink approximately up to
500
mA
at voltages up to
48V
(when used individually) subject to to-
tal heat dissipation restrictions for the driver chips (
1
.
25W
).
7
One analog output (
DAC
) which can be either a
0
–
10V
volt-
age output or
0
–
20
mA current output. A second analog volt-
age output (
UEXP
), normally used by software to drive the
universal inputs, is available when the universal inputs have
a fixed hardware threshold. The
DAC
s have
10
-bit resolution.
8
An
RS422/RS485
serial port and an
RS232
serial port with
two handshaking lines operate at up to
38
,
400
baud. A sec-
ond
RS232
port can be configured as a substitute for the
RS485
port by changing board jumpers. It has no handshak-
ing lines.
9
A
26
-pin expansion bus (
PLCB
us TM ) for Z-
W
orld
PLCB
us de-
vices or customer-designed devices. Refer to the PLCBus
data sheet.
The Terminals
There are
50
screw terminals used for input, output, and power
connections. There are two connectors on the sides of the unit:
a
RJ12
“phone jack” for the
RS232
port, and a
26
-pin connector
for the expansion bus.
The signal names of the screw connectors are shown below.
Signal Meaning
+
10V
Ref Output from
U11
, analog reference voltage.
+
5V
Output from
5V
regulator
GND
Ground
U1
–
U6
Universal inputs
D1
–
D7
Digital inputs
C1A
,
C1B
Counter 1 inputs
C2A
Counter 2 input
C2B
+,
C2B
– Counter 2 inputs, differential
TX
–,
TX
+ RS485 Transmit
RX
–,
RX
+ RS485 receive
+
24V
External power
K
Protection for high-current outputs
O1
–
O7
O1
–
O10
High-current outputs
A/D
– Negative side of high-gain input
A/D
+ (
1
) Positive side of high-gain input, or
(
2
) the seventh universal input
DAC DAC
output,
0
–
20
mA or
0
–
10
volts.
UEXP
Internal
DAC
, output is
0
–
10V
.
NC
,
COM
,
NO
Relay contacts for relays
1
and
2
+10V ref
+5V
GND
U1 U2 U3 U4 U5 U6
GND
D1 D2 D3 D4
D5
/C
1A
D6
/C
1B
D7/
C2A
GND GND
Tx– Tx+
Rx– Rx+
C2B+ C2B–
+24V K GND O1 O2 O3 O4 O5 O6 O7 O8 O9 O10 GND A/D
–
A/D
+
DAC UEXP NC COM NO NC COM NO GND
Universal
Inputs
Digital
Inputs
Digital
Outputs
Relay1 Relay2
RS485 /
RS422
/
High-Gain Input DAC Output
Diff.
Counter
DC In
For
12
-volt versions of the
PK2100
,
• The connector labeled “+
10V
ref” is +
7
volts.
• The connector labeled “+
24V
” is +
12
volts.
•
DAC
output (either channel) is not
0
–
10V
, but
0
–
7V
.
• Universal input range (any) is not
0
–
10V
, but
0
–
7V
.
• The high-gain channel is not
0
–
1V
, but
0
–
0.7V
.
• Relay coil voltage is
12V
. Relay rating is
5A/120V
.
Figure 2. PK2100 Signals