 The T8AD, 8 channel analog/digital I/O expansion card, provides eight
I/O channels which can individually be configured as either a 0-5
Volt 12-bit analog input, a digital input with latch
or a high current sink digital output. Digital input and output functions
can coexist. Digital output and analog input functions can coexist.
The T8AD has 5 built-in multidrop controllers (DS2406) which provide 5 unique
64 bit registration numbers (8-bit family code + 48 bit serial number + 8 bit CRC)
assuring error-free selection and absolute identity; no two parts are alike. Unique
addressing allows I/O function to be identified absolutely, no more dip switch address
confusion. Status input , latched-input-activity and output-latch functions allow
input, output and fast event catch functionality to hundreds of I/O points on a
1-Wire bus. One DS2406 provides the 1-Wire gateway for the 12-bit analog data acquisition
sub-system. Four additional DS2406s provide the digital I/O functions. The digital
I/O functions and the analog inputs (1-8) share the 8 connector positions 1-8 respectively.
Positions at either end of the I/O connector marked "G" are ground returns.
The T8AD is designed to allow a network of input and output modules to operate
on a two or three wire bus, power("+"), common("C") and signal("S"). The T8AD can
be powered locally or the power may be bussed with the 1-Wire signal in a three
wire system. The bussed power can be unregulated 8V to 16V DC. The T8AD provides
onboard 5-volt regulation for I/O and analog sub-system operation. The onboard power
supply has a very low quiescent current and low dropout voltage to allow long cable
runs with minimum loss. The T8AD can be stacked side by side for minimum panel space,
or they can be spaced hundreds of feet apart to minimize analog signal wiring.
The T8AD is compatible with the EDS OneSix DDE server and family of 1-Wire enabled
devices, as well as any 1-Wire host with support for the Dallas Semiconductor
DS2406
Dual Addressable Switch and EDS Analog.
Features
- 8 channels, each configurable as an analog input, digital input, or digital
output.
- All data transfers are CRC16 error checked.
- 12-Bit (0 to 5 Volt) analog inputs.
- Digital outputs, (4) sink 50-mA., (4) sink 8-mA.
- Digital inputs are latched until read.
- Built-in multidrop controllers, (DS2406).
- CAT-5 twisted pair up to 2000 Feet, 200 devices.
- 1-Wire communication protocol.
- Built-in low quiescent-current regulator.
- Wide operating voltage range, 8-16V DC.
- Built-in mounting spacers and Phoenix screw connectors.
- Second 1-Wire connector for easy net expansion.
Specifications
- Supply Voltage: 8 - 16.6 Volts
- Supply Current: 3 - 8 mA
- Output Sink Current (A Positions 1,3,5,7): 50 (see DS2406) mA
- Output Sink Current (B Positions 2,4,6,8): 8 (see DS2406) mA
- Analog input range: 0 - 5 Volts
- Analog Input resolution (Positions 1-8): .00122 Volts
- Analog Input Impedance (Positions 1-8): 100 KOhm
1-Wire is a registered trademark of Dallas Semiconductor Corporation. Phoenix
is a trademark of Phoenix Contact.
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