Function groups 15
Manual ADQ-22/23-Serie Rev. 1.1
Function groups
Block diagram ADQ-23
ADQ-23
DO_E7…0
DIO_G7…0
GND_EXT
DI_A7…0
GND_EXT
VEXT_DO
GND_PC
VCC_OUT (+5 V)
DI Port C
GND_EXT
VEXT_DI
DI_B7…0
IRQ
DO_F7…0
GND_EXT
VEXT_DO
IRQ
DI Port A
DI Port B
DO Port E
DO Port F
Relay Port D
DIO Port G
GND_EXT
DI_C7…0
CO_x
NO_x
NC_x
IDC connector
78-pin D-Sub female connector
Address-/
data bus
CompactPCI Serial / PCI Express interface
Molex connector
(+5V for PCI Express)
Interrupt
Control and
interrupt logic
Temperature monitoring
Temperature monitoring
TTL-I/Os
(1 x 8 bit port)
Current limitation per channel
Current limitation per channel
Isolated up to 500 V
IRQ
Bit-pattern match
Bit-pattern change
8 bit digital input
IRQ
Bit-pattern match
Bit-pattern change
8 bit digital input
IRQ
Bit-pattern match
Bit-pattern change
8 bit digital input
Digital
filter
Digital
filter
Digital
filter
8 bit output port
8 bit output port
8 bit input port
8 bit input port
8 bit input port
Fig. 4: Block diagram ADQ-23
• 24 isolated digital inputs (3 x 8 bit ports) with programmable filter
• 16 isolated digital outputs (2 x 8 bit ports)
• 8 bidirectional TTL digital I/Os (1 x 8 bit port) usable via supplied adapter cable if required
• 8 change-over relays (SPDT)
3.2 Isolated digital inputs
The
ADQ-22
has 2 isolated digital input ports with 16 bits each and the
ADQ-23
has 3 isolated
digital input ports with 8 bits each. The isolated inputs have a Schmitt trigger characteristic
according to IEC 61131-2 (type 1) and are designed for a max. input voltage of 35 V. All isolated
inputs are equipped with status LEDs. The isolation voltage against PC ground is 500 VACeff
according to EN60664-1 or UL1577.
If required, all inputs can be monitored for bit change or bit pattern equality and evaluated as
an interrupt event. In addition, an interrupt can be triggered if the external voltage supply is too
low (VEXT_DI < 8 V) or missing (VEXT_DI < 12.1 V).
3.2.1 Digital input filter
To prevent unwanted effects caused by contact bounce, you can programme a digital filter for
each input port. Choose between the following values:
10 ms (N = 1248) / 3.2 ms (N = 400) / 1.0 ms (N = 125) / 10 µs (bypass). The scan frequency is
100 kHz (typ.).
0
1
2
N-1
N-2
N-3
Scan frequency
Input DI_x
Filter output
Filter state
Signal is 1
Signal is 0
Filter time
Signal is
unchanged
Fig. 5: Digital input filter
3.2.2 Wiring
The isolated inputs have a Schmitt trigger characteristic according to IEC 61131-2 (type 1) and
are designed for the input high level UIH of typ. 24 V which is common in control technology.
Observe the following conditions:
• Threshold voltage L x H: > 15 V @ VEXT_DI = 24 V
• Threshold voltage H x L: < 11 V @ VEXT_DI = 24 V
• Hysteresis: typ. 1 V
The external supply VEXT_DI can be in the range 9.6..35 V, we recommend 24 V. Note that a
ground connection must always be made from the ext. circuitry to the reference ground of the
isolated digital inputs (GND_EXT). The digital input section and the digital output section use
GND_EXT together.
