IO-3 Combination Analog Digital I/O Module – 8 Input/5 Output

Input characteristics are compatible with a wide range of user supplied input devices.

Features:

The combination analog/digital I/O module provides:

• 4 x AI Analog inputs
• 1 x AO Analog output
• 4 x DI Digital input
• 4 x DO Digital outputs

Analog I/O

This module provides two signal ranges, 0 to 20mA and 4 to 20mA. The default range is 4-20mA. A link on the rear of the module selects 4-20mA (link installed) or 0-20mA I/O for all channels.

Resolution of the converted signals is 12 bits binary (1 part in 4096). The sign bit is not used in the conversion process. All channels are updated four times per second.

All inputs share a single common and all outputs share a separate common at the zero volt rail.

Input protection for the module is sufficient to guarantee operation with reduced performance with up to 1500V common-mode. The module provides electrical isolation of externally generated noise between field wiring and the backplane through the use of optical isolation.

Digital I/O

Input characteristics are compatible with a wide range of user supplied input devices, such as push buttons, limit switches and electronic proximity switches, whilst outputs can control a wide range of user supplied load devices such as: motor starters, solenoids and indicators.

Power for the internal relay circuits is provided by the +12VDC bus on the backplane. The user must supply the AC or DC power to operate field devices. An internal fuse protects the relay contacts should ratings be exceeded.

Overview

• 4 Digital Inputs
• 4 Digital Outputs (N.O relay)
• 4 Analog Inputs
• 1 Analog Output

Order Information

• IO-3-1 (Multi I/O 4xDI + 4xDO + 4xAI + 1xAO)

Datasheets

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Product specifications:

Analog Input Section
Input Current Ranges	4 to 20mA and 0 to 20mA
Input Voltage Ranges	* 1 to 5V and 0 to 5V *
Calibration	Factory calibrated to 5µA
Update Rate	2 msec (all four channels)
Absolute Accuracy	0.1% full scale + 0.1% reading
Resolution	12 bit (no sign bit)
Common Mode Voltage	1500 Volts
Linearity	<1 Least Significant Bit
Isolation	1000 Volts RMS between field and logic
Common Mode Rejection	>70 dB at DC; >70 dB at 60 Hz
Cross-Channel Rejection	>80 dB from DC to 1 kHz
Input Impedance	250 ohms (100 ohms optional)
Input Filter Response	325 Hz
* Analog inputs can be modified from current inputs to voltage inputs by lifting one leg of the 250 ohm channel resistor. Each channel has its own resistor, so any combination of channels can be converted.
Analog Output Section
Output Current Range	4 to 20mA and 0 to 20mA
Calibration	Factory calibrated to 68µA per count
Supply Voltage (nominal)	+5V and +12VDC from backplane
Update Rate	250 msec (all channels) Determined by I/O scan time, and is application dependent
Absolute Accuracy	0.1% full scale Resolution 12 bit (no sign bit)
User Load	0 to 850 ohms
Output Load Capacitance	2000 pF
Output Load Inductance	1H
Isolation	1000 Volts RMS between field and logic
Digital Input Section
Rated Voltage	24 Volts AC/DC
Input Voltage Range	0 to +30 Volts AC/DC
Inputs per Module	4
Isolation	1000 Volts RMS between field and logic
Input Current	4mA (typical) at rated voltage
Input Characteristics:
On-state Voltage	11.5 to 30 Volts AC/DC
Off-state Voltage	0 to +4 Volts AC/DC
On-state Current	3.2mA minimum
Off-state Current	1mA maximum
On response Time	10ms typical
Off response Time	17ms typical
Digital Output Section
Rated Voltage	24 Volts DC, 120/240 Volts AC
Operating Voltage	5 to 30 Volts DC 5 to 250 Volts AC, 50/60 Hz
Outputs per Module	4
Isolation	1000 Volts RMS between field and logic 500 Volts RMS between groups
Maximum Load	2 amps pilot duty maximum per output 8 amps maximum per common
Minimum Load	10mA
Maximum Inrush	5 amps
On Response Time	15 ms maximum
Off Response Time	15 ms maximum
Environmental
Operating Temperature	-20°C to 70°C / -4°F to 158°F
Storage Temperature	-40°C to 85°C / -40°F to 185°F
Operating Humidity	5 to 95% RH non-condensing
Output Power	24VDC @ 125mA (3W) Isolated