User`s manual
XP8000 Series (PLCBus
TM
)
Z-World 530-757-3737 14
Universal Input/Output Board
Z-World’s Universal Input/Output board (XP8800) adds 16 uni-
versal inputs and six high-current outputs to your control sys-
tem. The universal inputs can be used as
• digital inputs with single fixed threshold
• digital inputs with two adjustable thresholds
• analog inputs.
For the latter 2 cases, an external voltage source is required.
P1
Selector
P2
H1 H2 H3
U2
PA L
U4
J6
C18
U11
Regulator
U1
Comparator
U8U7U6U5
RN1 RN3
Selector
C26
Drivers
U10
Latch
U9
H4
J3
J2
J4
J5
U3
RN2
RN8
Comparator
Comparator
Comparator
J1
C1 9
Up to 32 XP8800 (UIO for short) boards can be addressed on a
single PLCBus.
External Connection
The universal inputs (IN0–IN15) appear on headers H1 and H2.
High-current outputs (/L0–/L5) appear on header H3.
0
1
2
3
GND
EX+
5
4
3
2
1
0
SUB
+VI
4
5
6
7
8
9
10
11
12
13
14
15
GND
DA
H1 H2 H3
Inputs Outputs
Pins Description
IN0–IN15 Universal inputs
GND Board ground
DA External voltage source (presumed to be a DAC).
EX+ External excitation voltage.
/L0–/L5 High voltage driver outputs.
+VI External supply voltage for devices driven by /L0
through /L5.
SUB External supply ground.
Jumpers
The UIO board uses 7 jumpers, J1 through J6 and H4. Pins 1 and
2 of jumper J1, coupled with the encoding of the PAL chip U2,
determine the board’s PLCBus address. This is explained later.
The signals on J1 are shown here:
2
4
1
3
65
87
109
1211
1413
K
VIN
BD0 GND
VCC EX+
CV+ EX
V+
+24V +24V
VH
VIN
V+
Pins Description
1-2 Least significant bit of board address (1 if not connected).
3-5 Comparator voltage CV+ connected to VCC.
5-7 Comparator voltage
CV+ connected to V+ (default).
4-6 Reference voltage connected to external excitation voltage
(
EX+).
6-8 Reference voltage connected to
V+ (default).
9-11 Input voltage to regulator (VH) is +24V from PLCBus
(default).
11-13 Input voltage to regulator (VH) is VIN, from external
supply.
10-12 Common protective diode
K connected to +24V from
PLCBus.
12-14 Common protective diode K connected to VIN from exter-
nal supply (default).
When jumper J6 is connected (it has only two pins) V+ is 7
volts. Otherwise, it is 14 volts.
Jumper H4 selects whether the inputs are digital or “universal.”
H4
threshold voltage
from external
source
threshold voltage
generated on
board
1
H4
1
Jumpers J2, J3, J4, and J5 comprise one large header for con-
necting the universal inputs. There are 16 columns on this
header, one for each of the 16 input channels. There are three
pins in each column. Connecting the upper two pins pulls a
channel’s input to ground. Connecting the bottom two pins in a
column pulls that channel’s input up to the excitation voltage:
J3
J2
J4
J5
Input Channels 0–15
input 10 to ground, across 4.7 k
Ω
input 2 to excitation voltage, across 3.3 k
Ω
The “Universal” Inputs
The UIO board’s 16 inputs (IN0–IN15) are fed to the positive
side of 16 comparators. The negative side of the comparators
are driven either by an external analog voltage source (DA) or a
fixed threshold VL.
UI
x
–
+
IN
x
CV+
22K
U2
3.3K
4.7K
CP
x
VCC
VL
EX+ V+
THRESH
DA
V+
10K
0.01µ
10K
R4
CV+
0.1µ
10K
R5
LM339
comparator
16
16
H4
123
J1
357
J1
468
VCC