Trend IQ4/IO.. I/O Expansion Modules Data Sheet

Description

The Trend IQ4/IO range comprises DIN rail mounted I/O expansion modules designed for use with IQ4E and IQ4NC/32/XNC controllers. They offer additional input and output channel connection points and can be located up to 300 meters (328 yards) from the controller. IQ4/IO modules are also compatible with IQ3XCITE/96 and IQ3XCITE/128 controllers (v3.10 firmware onwards) and XCITE/IO modules. These modules provide a comprehensive choice of I/O types, including digital inputs (DI), universal inputs (UI), universal inputs/outputs (UIO), digital/relay outputs (DO), and analogue outputs (AO). Two 'hand-off-auto' (HOA) variants, 8AO/HOA and 8DO/HOA, are available, offering manual override of module outputs.

Features

• 16DI, 8DI, 8UI, 8UIO, 4UIO, 8DO, 4DO, and 8AO options.
• 8AO/HOA and 8DO/HOA hand-off-auto options.
• Supports up to 30 I/O modules per controller (IQ4E & IQ4NC/32/XNC).
• Provides up to 192 I/O channels (with IQ4E, including controller I/O).
• Versatile I/O bus allows convenient module placement.
• Supports up to 300m (328 yds) I/O bus length (IQ4E & IQ4NC/32/XNC).
• Powered from controller I/O bus or external PSU.
• Features two-part I/O connectors for easy installation and commissioning.
• Compact design with TS35 DIN rail mounting.
• Housed in a DIN 19 size 2 standard enclosure.

Physical Characteristics

The IQ4/IO modules are available in different physical configurations:

• 70 mm Modules: Dimensions are 70 mm (2.76") width x 116 mm (4.57") height x 58.5 mm (2.3") depth. Examples include 8DI, 8UI, 8AO, 4UIO variants.
• 105 mm Modules: Dimensions are 105 mm (4.13") width x 116 mm (4.57") height x 58.5 mm (2.3") depth. Examples include 16DI, 8UIO, 8DO, 4DO variants.
• HOA Variants: These modules have a greater depth of 68.8 mm (2.71") and include variants like 8AO/HOA and 8DO/HOA.

Functionality and Hardware Variants

The IQ4/IO range comprises the following hardware variants:

• ../16DI: 16 Digital Inputs (Channels 1-8 and 9-16).
• ../8DO: 8 Digital/Relay Outputs (Channels 1-4 and 5-8).
• ../4DO: 4 Digital/Relay Outputs (Channels 1-4).
• ../8UIO: 8 Universal Inputs/Outputs (Channels 1-4 and 5-8).
• ../8DI: 8 Digital Inputs (Channels 1-4 and 5-8).
• ../8UI: 8 Universal Inputs (Channels 1-4 and 5-8).
• ../8AO: 8 Analogue Outputs (Channels 1-4 and 5-8).
• ../4UIO: 4 Universal Inputs/Outputs (Channels 1-2 and 3-4).
• ../8AO/HOA: 8 Analogue Outputs with hand-off-auto control (Channels 1-4 and 5-8).
• ../8DO/HOA: 8 Digital/Relay Outputs with hand-off-auto control (Channels 1-4 and 5-8).

Enclosure and Mounting

Each IQ4/IO Module is housed in a polycarbonate enclosure styled to complement the IQ4E controller. Modules are available in 70 mm or 105 mm widths. Integral spring clips on the back allow for easy attachment and release from a standard TS35 DIN rail. Rotating clear polycarbonate covers provide access to top and bottom I/O channel connections. IQ4/IO Modules must be installed in a secondary enclosure with a minimum protective rating of IP20 (or equivalent) or mounted outside normal reach (e.g., in a plenum). Modules can be mounted horizontally or vertically, but not upside down or on their back.

Input/Output Channels

Supported Channel Types

The following types of input and output channels are supported:

• Universal Input/Output (UIO)
• Universal Input (UI)
• Digital Inputs (DI)
• Digital/Relay Output (DO)
• Analogue Outputs (AO)

Cable Screening

The use of screened cable for input and/or output connections is optional. It is generally not required unless cables pass through electrically noisy environments. If screened cable is used, the screen must be connected to the local panel/enclosure ground and left unterminated at the far end.

Universal Input/Output (UIO)

These channels function as one of the following, determined by the controller strategy:

• Thermistor input
• Voltage input
• Digital input
• Current input
• Analogue output

Example Wiring Descriptions:

• Thermistor Input: Used for a thermistor (NTC 10 kΩ @ 25°C), potentiometer (0 to 200 kΩ), or fan speed control. The thermistor bridge resistor is 12 kΩ with a 3.3 V bridge supply.
• Voltage Input: Used with a 0 to 10 Vdc source.

Digital Inputs (DI)

Digital inputs are used for volt-free contacts, logic circuits (e.g., TTL, CMOS), open collectors (transistors), or open drains (FETs). The volt-free contact has a nominal wetting current of 270 µA; the input is ON when the contact is closed. Open collectors or open drains must be able to sink 270 µA; the input is ON when the transistor or FET conducts. Logic circuits must be able to sink 270 µA; the input is ON when the applied voltage is less than 2 Vdc (minimum 0 V) and OFF when greater than 3.5 Vdc (maximum 50 Vdc). Voltage levels between 2 Vdc and 3.5 Vdc may cause indeterminate operation.

Example Wiring Descriptions:

• Volt-free contact / Logic circuit: Shows connections for a 270 µA current source to a logic circuit or volt-free contact.
• 24 Vac Circuit: Digital inputs can monitor 24 Vac circuits. Example wiring shows a 24 Vac source connected via a load (e.g., >1.6 kΩ or <1.6 kΩ with a series resistor) to the input.

Current Input

Used for 0 to 20 mA sources, which can be loop-powered or externally powered. The output terminal can source up to a maximum of 20 Vdc to power the sensor in loop-powered mode. Note that if the sensor output current is 20 mA, the voltage across the sensor will be at least 10 V if the module supply voltage is not less than 22V. For higher minimum sensor voltage requirements, increase the module supply voltage or use an external supply.

Example Wiring Descriptions:

• Loop Powered: Shows a sensor connected directly to the module's input terminals.
• Externally Powered: Shows a sensor connected to an external power supply and the module's input terminals.

Universal Inputs (UI)

These channels are set by the controller strategy to function as voltage input, current input, thermistor input, or digital input (volt-free contact, open collector/drain, or logic). Input noise rejection is a minimum of 60 dB series mode rejection at the input power supply frequency. Specifications for voltage, current, and thermistor inputs are similar to those for UIO channels.

Analogue Output (AO)

Provides a variable voltage between 0 to 10 Vdc. The output can source up to 20 mA and sink up to 3 mA. This output is used for variable control of actuators, converters, and lighting dimmers.

Example Wiring Description: Shows a load connected to the 0-10 Vdc output terminals.

Digital/Relay Outputs (DO)

These channels provide a single-pole dry contact changeover relay. The relay contacts close (NO makes with C) when the output channel is ON. The volt-free contact has a nominal wetting current of 2.5 mA. Open collectors or open drains must be able to sink 2.5 mA. Logic circuits must be able to sink 2.5 mA, with specific voltage thresholds for ON/OFF states.

Example Wiring Description: Shows a relay output connected to a load, with connections for POWER SUPPLY and LOAD.

I/O Bus

IQ4/IO modules interconnect with each other and the controller via the I/O bus, which comprises power and signal connections: +24 Vdc, Data Hi, Ground, Data Lo, and 0 V. Access to the I/O bus on the IQ4E controller is via a connecting point on its right-hand side. Each IQ4/IO module has similar connecting points on both sides, enabling daisy-chaining. A short rigid interconnector (IQ4/IC/LINK) is available for connecting adjacent modules; one is supplied with each module.

I/O Bus Length and Configuration

Maximum I/O bus length depends on the cable type and configuration:

*Maximum 10 m (11 yards) for certain system configurations. Refer to XCITE/IO Modules Data Sheet (TA201352) and XCITE/IO Installation Instructions - Mounting (TG200627).

For all installations, if the bus voltage at the I/O module drops below 19.2 V at full load, install another power supply at that module.

Maximum Number of Modules

Up to 30 modules can be connected to the I/O bus, depending on the configuration:

Ensure the controller supports the required number of I/O channels.

Bus Termination

The I/O bus must be terminated at the farthest end from the controller. A plug-in terminator (IQ4/IC/TERM) is supplied with the IQ4E controller.

Earthing/Grounding Arrangements

Correct earthing/grounding is essential. The I/O bus ground connects to earth/ground via the controller. Modules in the same secondary enclosure are earthed via the I/O bus. For modules in different enclosures or I/O bus cables exceeding 1 m (39"), a local earth/ground connection must be provided. All DIN rails must be earthed/grounded.

Module Power Supply

I/O modules are typically powered from the controller via the I/O bus, derived from the controller's 24 Vdc supply. The maximum current available depends on other controller demands. Refer to controller data sheets for I/O bus current details.

Maximum Current Consumption per Module

If the total current requirement exceeds the controller's maximum, or for long bus runs to prevent voltage drop, additional 24 Vdc power supplies may be needed. Additional supplies are also required if the current flow through a module's power line exceeds 1 A, necessitating splitting or segmenting the I/O bus power line.

Additional Power Supplies

When installing an additional power supply along the I/O bus, the supply output must be isolated from earth (ground) and comply with relevant EMC and safety standards. Trend offers suitable auxiliary power supplies. If an external supply is used, the normal 24 Vdc I/O bus connection between modules is not made; the external supply is wired between the 24 Vdc and 0 V terminals. The 0 V connection must be continuous for the entire I/O bus length. The standard cable adapter (IQ4/IC/ADPT) is used for connecting external power supply units. An example shows modules split into groups powered by the controller and external PSUs.

Indicators

Various indicators provide feedback on module and input/output status.

General Indicators (Centre of Cover)

Input/Output Indicators (Adjacent to Terminals)

Controls

Service Button

A multi-function button on the module's front. It can be used to assign an unaddressed module, display the module's address by flashing the I/O bus indicator, or perform a module reset (in conjunction with a power cycle).

HOA (Hand-Off-Auto) Modules

The 8AO/HOA and 8DO/HOA modules feature a rotary/push-button control for each output channel, allowing manual override of normal (Auto Mode) operation. Rotating the control presets the required override level or ON/OFF state. Pressing the control engages Manual Mode, setting the output to the preset level/state. While in Manual Mode, the control flashes red and can be adjusted. Yellow indicators show the output state. Pressing the control again returns the output to Auto Mode.

HOA Module Output States (Auto Mode)

Important: New modules power up in Auto Mode. Previously used modules power up in the mode they were in when last powered down.

Label Carrier

The 8AO/HOA and 8DO/HOA modules include an optional clip-on label carrier with slide-in tab inserts for identifying output functions or circuit designations. Labels can be created using standard tape printers.

Field Maintenance

The IQ4/IO Expansion Modules require no routine maintenance. Do not attempt to open the unit, as it contains no serviceable parts.

Disposal and Recycling

Follow COSHH (Control of Substances Hazardous to Health) UK Government Regulations 2002 for disposal assessment. All plastic and metal parts are recyclable. Printed circuit boards can be sent to PCB recovery contractors. Dispose of packaging, product, and batteries according to the WEEE Directive at a suitable recycling centre. Do not dispose of with normal household waste or burn.

Compatibility

Controllers: IQ4E, IQ4NC/32/XNC, IQ3XCITE/96*, IQ3XCITE/128*. (*v3.10 firmware onwards). The IQ4/IO/8AO/HOA module is not fully supported on IQ3 controllers; it functions in Auto Mode but may not accurately report overridden output values in Manual Mode.

I/O Modules: XCITE/IO.

Installation

IQ4/IO Expansion Modules are designed for clipping onto a standard TS35 DIN rail and must be installed inside an enclosure rated to at least IP20 (or equivalent) or mounted outside normal reach (e.g., in a plenum). The modules are UL rated as 'UL60730 listed open energy management equipment'.

Installation Procedure Steps

1. Mount the I/O module(s) in position.
2. Connect the I/O bus.
3. Terminate the I/O bus.
4. Connect additional PSUs (if required).
5. Connect universal inputs/outputs (UIO modules only).
6. Connect universal inputs (UI modules only).
7. Connect digital inputs (DI modules only).
8. Connect analogue outputs (AO modules only).
9. Connect relay outputs (DO modules only).
10. Isolate all I/O connections.
11. Download strategy to the controller.
12. Reconnect all inputs and check operation.
13. Reconnect all outputs and check operation.

Refer to the IQ4/IO Expansion Modules Installation Instructions (TG201342 and TG201343) for detailed information.

Order Codes

• IQ4/IO/16DI: I/O Module with 16 digital input channels.
• IQ4/IO/8DO: I/O Module with 8 digital/relay output channels.
• IQ4/IO/4DO: I/O Module with 4 digital/relay output channels.
• IQ4/IO/8UIO: I/O Module with 8 universal input/output channels.
• IQ4/IO/8DI: I/O Module with 8 digital inputs.
• IQ4/IO/8UI: I/O Module with 8 universal inputs.
• IQ4/IO/8AO: I/O Module with 8 analogue 0-10 V outputs.
• IQ4/IO/4UIO: I/O Module with 4 universal inputs/outputs.
• IQ4/IO/8AO/HOA: I/O Module with 8 analogue 0-10 V outputs with hand-off-auto control, plus label carrier with 12 tab inserts.
• IQ4/IO/8DO/HOA: I/O Module with 8 digital/relay output channels with hand-off-auto control, plus label carrier with 12 tab inserts.

Accessories

• IQ4/IC/TERM/5: Pack of 5 spare I/O bus terminators.
• IQ4/IC/LINK/5: Pack of 5 spare rigid I/O bus interconnectors.
• IQ4/IC/ADPT/2: Pack of 2 I/O bus cable adapters.
• IQ4/IC/ADPT/10: Pack of 10 I/O bus cable adapters.
• XCITE/CC/10: Pack of 10 I/O bus cable adapters for XCITE/IO modules and IQ3 controller.
• IQ4/IO/LABEL/5: Label carrier (plus 12 tabs) for IQ4/IO/xxx/HOA modules (5 off).

Specifications

Electrical

Inputs/Outputs - Universal Input/Output (UIO)

Inputs/Outputs - Universal Inputs (UI)

Digital Inputs (DI)

Analogue Outputs (AO)

Digital/Relay Outputs (DO)

Note: For safety, relays must switch only low voltage or mains, not a mixture. If switching mains, ensure same phase and polarity. Arc suppression circuit (RC) recommended for inductive loads. UL rating applies up to 240 Vac (120 VA) maximum.

Indicators

Controls

Mechanical

Environmental