Specifications

PK2100 Series Z-World 530-757-3737 3
The Interface
A PK2100 Series 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-World 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-World 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 kHz 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 MOVs 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 DACs 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 (PLCBus
TM
) for Z-World PLCBus 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/C1A D6/C1B
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