User`s manual

XP8000 Series (PLCBus
TM
) Z-World 530-757-3737 10
Eight different PALs are available and J3 can be set eight differ-
ent ways, giving 64 unique addresses:
000z 001y pppx
z = 1 when J3 pins 5-6 are not connected
y = 1 when J3 pins 3-4 are not connected
x = 1 when J3 pins 1-2 are not connected
The bits ppp are determined by the PAL number. Software gives
DAC2 expansion boards logical addresses, 0–63, according to
the formula:
logical address = ppp × 8 + zyx
where ppp and z, y and x are defined above.
Current Consumption
With no output, the DAC2 board draws 30 mA. With both output
channels operating at maximum current (22 mA) the DAC2
board draws a total of 75 mA.
DAC2 Specifications
Board Size 2.835 × 3.525 × 0.75
Operating Temp –40°C to +70°C
Humidity 5% to 95% non-condensing
Power
24VDC, 30 mA
Provides Two 12-bit DAC channels, rated 0–10V voltage
output or
0–22 mA current ouput.
The DAC8
Z-World’s DAC8 (XP8900) expansion boards add digital-to-ana-
log conversion (DAC) channels to your control system. Up to 8
DAC8
boards can be addressed on a single PLCBus.
+
+
+
+
+ +
+
+ + + +
U17
+
R37
+
R36
R35
C34
C7
C33
C9
P1
U1
OpAmps
U9 U10 U11 U12
C1 C2 C11 C12
C26
C31
C18
Q1
C17
U7
C27
C30
U13 U14 U15 U16
C13 C14 C15 C16
H3
H2
H1
C8
C35
C5
H4
C3
P2
C21
C23
P3
C20
R16 R3 0
R15 R2 9
R27 R12
R28 R11
C25
C29
R32 R14
R31 R13
R10 R2 5
R9 R26
R24 R6
R23 R5
C19
R34
R39 R33
R19 R4
R20 R3
R7 R22
R8 R21
R2 R17
R1 R18
C24
C28 U6
C22
C32
C36
C6
R38
C4
C10
U8
J1 J2
(J3)
OpAmps
AD5300
DACs, 8x
12V
Reg
5V
Reg
CPLD
Reference
U4 U3
RN1
U5
U2
The XP8900 has eight channels. The XP8910 has four channels.
Each channel be operated as a bipolar voltage source. The fac-
tory default range for voltage output is –10V to +10V. Each
channel can source or sink 2 mA on internal power or 7 mA
with external power. The D/A chips—AD5320s—are accurate to
±16 LSB and have a gain stability of about 5 ppm per °C.
In sufficient quantity, Z-World will build XP8900s with from 1
to 8 channels, with 8- or 10-bit DACs, or with customer-defined
voltage ranges.
The board’s main power supply (U2, U6, U7, U17) provides +5V
(VCC), +5V reference for the DACs and +12V and –12V “rails”
for the op-amps. Q1 switches a +2V reference voltage to the op-
amps for power conservation. Jumpers H1, H2 and H3 allow you
to connect external ±12V rails to the op-amps if you wish. Ex-
ternal power has a higher current rating.
U2
REF
/2V_EN
+12IN
–12IN
+12VREF
–12VREF
U7
12V Reg
+12V
U17
V+C+
C– VOUT
H3
H1
H2
Charge
Pump
U6
5V Reg
+5V
+5VREF
to DACs
+2VREF
to op-amps
Q1 R34 11K
R39, R33
[16.364K]
+12V to
op-amps
–12V to
op-amps
+24V
Data are clocked into the DACs (low-power AD5300s). Output
of a DAC feeds into an op-amp which adjust the output to the
desired range.
+5VREF
+12VREF
–12VREF
U9 – U16
DIN
SCLK
/SYNC
VOUT
DAC
100K
+
–
OUT[0–7]
DA_EN[0–7]
DA_CLK
DA_DATA
410K
+2VREF
U3–U4
The default range is –10V to +10V. In sufficient quantity, you
can order your DAC boards with different output ranges.
External Connection
Analog signals leave the XP8900 on Wago headers J1 and J2.
Two terminals allow you to use external ±12V to power the
channel op-amps. Each channel has its own ground terminal.
Ground
+12V –12V
7 6 5 4 3 2 1 0
Outputs
[0–7]
External
Supply
J1 J2
When the DAC8 is used with most Z-World controllers, +V
(normally +24V) from the PLCBus is the power source. When
using the DAC8 board with some controllers, +24V is not avail-
able from the PLCBus.
Reset
The DAC8 board has a reset device, U8, that monitors VCC.
Whenever VCC is interrupted, U8 pulls /RST low.
When reset, all the DAC outputs are tristated. This state corre-
sponds to power-down mode 3.