Distech Controls RS485 UUKL Manuale utente

Installation Guide

Dual RS485 UUKL Option Module

Figure 1: Dual RS485 UUKL Option module

Product Description

The RS485 UUKL is a dual port, electrically isolated adapter, with two 3-

position, removable screw-terminal connector plugs. Each port has an

RS485 bias switch to set or remove biasing. LEDs verify power and

termination from the EC-BOS-8 UUKL and indicate RS485 trunk

message traffic.

The Dual RS485 UUKL Option Module is to be used with the

EC-BOS-8 UUKL in the Distech Controls' UUKL smoke

control system.

For detailed requirements, specifications, and procedures for

installing and operating UL 864 Listed equipment, you must

refer to the Distech Controls UUKL Smoke Control System

Design Guide (UUKL Design Guide_UG_10_EN).

Failure to meet the requirements or follow the procedures in

the Distech Controls UUKL Smoke Control System Design

Guide can void the UL 864 Listing for smoke control

equipment.

Module Combinations

The EC-BOS-8 UUKL supports a maximum total of two Dual RS485

UUKL modules.

COM Port Assignments

The EC-BOS-8 UUKL has two onboard RS485 ports that always operate

as COM1 and COM2. Installed serial option modules continue COM port

numbering based on proximity to the EC-BOS-8 UUKL, where the option

module closest to the EC-BOS-8 UUKL base operates as the next

available serial COM port(s). For example, if attached directly to the EC-

BOS-8 UUKL, this dual RS-485 option module operates as COM3 (upper

port) and COM4 (lower port).

For related details, see “COM Port Usage,” page 3.

Related topics such as the mounting and wiring of the EC-BOS-8 UUKL

or other option modules, installation of EC-Net™4 software, and usage

of the various RS-485-based drivers are in other documents. See

“Related Documentation,” page 4.

Included in this Package

Included in this package you should find the following items:

•One Dual RS485 UUKL option module, with two 3-position terminal

plugs for wiring to an RS485 trunk, and a grounding wire with quick-

disconnect connector.

•This Dual RS485 UUKL Option Module Install Sheet

Materials and Tools Required

Suitable tools and fasteners for mounting the unit, attaching it to an

already mounted EC-BOS-8 UUKL. DIN-rail mounting of the EC-BOS-8

UUKL and all its option modules is recommended.

A small flat-blade screwdriver is required to make wiring connections to

RS485 trunks.

2/4

Figure 2: Dual RS485 UUKL Option module

This document covers the mounting and wiring of a Dual RS485 UUKL

option module for an EC-BOS-8 UUKL.

RS485-A port COMn(next available). For example, COM3

RS485-B port COMn+1 (next + 1). For example, COM4

Precautions

General Precautions

The following are warnings relating to the installation of the EC-BOS-8

UUKL option module.

•Remove all power to the EC-BOS-8 UUKL before

attaching (plug in) or detaching (unplug) any option

module, to prevent possible equipment damage.

•Removal of the EC-BOS-8 UUKL’s cover is not

required. No configurable or user-serviceable items

(such as jumpers or a battery) are inside the option

module.

Static Discharge Precautions

Static charges produce voltages high enough to damage electronic

components. The microprocessors and associated circuitry within the

devices are sensitive to static discharge.

•Work in a static-free area.

•Discharge any static electricity you may have

accumulated. Discharge static electricity by touching a

known, securely grounded object.

Mounting

Mounting the EC-BOS-8 UUKL and all option modules on a 35mm wide

DIN rail is recommended. Mounting on a DIN rail ensures accurate

alignment of connectors between all modules. Tabs on the EC-BOS-8

UUKL or module can be used for panel mounting as an alternate to DIN

rail mounting.

•Remove all power to the EC-BOS-8 UUKL before

installing or removing option modules. See

“Precautions,” page 2.

Mounting on DIN Rail

Prerequisite: The EC-BOS-8 UUKL is securely mounted on a 35mm DIN

rail, with adequate room left to mount the module.

1. Pull the option module’s locking clip down.

2. Tilt the module to hook over the DIN rail.

3. Push down and in on the unit, fastening to the rail.

4. Slide the module firmly into the EC-BOS-8 UUKL’s connector (or

existing option module) to seat.

Repeat for other modules as needed (4 maximum).

5. Push up the locking clip on all modules.

6. Carefully secure both ends of the final assembly with DIN rail end-

clips provided by the DIN rail vendor.

To remove a unit from the DIN rail, pull down its locking clip.

Slide the unit away from other devices, then swing the

bottom out and lift away from the rail.

3/4

COM Port Usage

The Dual RS485 UUKL option adds two COM ports on the installed EC-

BOS-8 UUKL. The EC-BOS-8 UUKL has two onboard RS485 ports. In an

EC-Net 4 station running on the EC-BOS-8 UUKL, these two ports

always operate as COM1 and COM2.

Installed serial RS485 option modules continue COM port numbering

based on proximity to the EC-BOS-8 UUKL, where the option module

closest to the EC-BOS-8 UUKL base operates as the next available serial

COM port(s).

For example, if attached directly to the EC-BOS-8 UUKL, this dual RS485

option module operates as COM3 and COM4. If another dual RS485

option module is attached to it, the second module operates as COM5

and COM6.

Figure 3 shows a possible combination with port assignments.

Figure 3: COM port numbering examples

Wiring: Earth Ground Wiring

Earth grounding provides protection from electrostatic discharge or other

forms of EMI.

Figure 4: Earth ground to option module (and EC-BOS-8 UUKL)

Prerequisite: Nearby earth grounding point.

1. Install the included earth ground wire to the option module’s earth

ground spade lug, and terminate the other end to a nearby earth

ground.

2. The earth ground spade lug of the EC-BOS-8 UUKL should also be

terminated to earth ground. This also applies to any other option

module with a ground spade lug.

RS485 Wiring

Each of the two RS485 ports is capable of up to 115,200 baud, and uses

a 3-position, removable, screw terminal connector.

Use shielded, twisted-pair, 18-22 AWG cabling to wire in a continuous

multidrop fashion to other RS485 UUKL devices: “minus to minus”, “plus

to plus”, and “shield to shield”.

Connect the shield wire to earth ground at one end only, for example at

the option module. Figure 5 shows an example of RS485 wiring.

Figure 5: RS485 wiring example

RS485-A port COMnwith a network of RS485 devices.

RS485-A port COMn+1 with a network of RS485 devices.

RS485 devices on the same network should use the same

protocol and baud rate. Up to 32 or more devices may be

supported, depending on device specifications.

Images are simulated. While all efforts have been made to verify the accuracy of information in this manual, Distech Controls is not responsible for damages or claims arising

from the use of this manual. Persons using this manual are assumed to be trained HVAC specialist / installers and are responsible for using the correct wiring procedures and

maintaining safe working conditions with fail-safe environments. Distech Controls reserves the right to change, delete or add to the information in this manual at any time

without notice.

Distech Controls, the Distech Controls logo, Open-to-Wireless, EC-Net, Innovative Solutions for Greener Buildings, ECO-Vue, and Allure are trademarks of Distech Controls

Inc. BACnet is a registered trademark of ASHRAE. Echelon, LON, LonTalk, LONMARK and LONWORKS are registered trademarks of Echelon Corporation registered in the

United States and other countries.

4/4

RS485 UUKL_IG_10_EN

RS485 Bias Switches

Each RS485 port has an adjacent 3-position biasing switch.

Figure 6: RS485 UUKL module bias switches

Settings of each RS485 bias switch are as follows:

•BIA - (Default, middle) RS485 biasing and termination: 2.7K bias

resistors with no termination resistor

•END - RS485 biasing and a termination: 562 Ohm bias resistors and

150 Ohm termination resistor

•MID - RS485 biasing or termination: 47.5K bias resistors with no

termination resistor

Often, adding RS-485 biasing can improve communications by

eliminating indeterminate idle states.

Typical scenarios for the best RS485 bias switch position are as follows:

•BIA - (Default, middle) Often best if the RS485 trunk needs biasing,

but when the EC-BOS-8 UUKL is not installed at the end of the trunk.

•END - Often best if the EC-BOS-8 UUKL is installed at the end of an

RS485 trunk of devices that is not already biased.

•MID - Often best if the EC-BOS-8 UUKL is put in the middle of an

already-biased RS485 trunk.

If desired, you can change the position of an RS485 port’s bias switch

while the EC-BOS-8 UUKL is running.

Each RS485 port also has two LEDs. See “LEDs”.

LEDs

Five LEDs are on the front of the Dual RS485 UUKL option module.

Figure 7: LEDs on Dual RS485 option.

COMn(e.g. COM3), TX (Transmit) and RX (Receive).

COMn+1 (e.g. COM4), TX (Transmit) and RX (Receive).

PWR —Green, remains lit while EC-BOS-8 UUKL is

powered.

LED pairs TX and RX operate as follows:

•TX (yellow) —Transmit, flashes when the EC-BOS-8 UUKL is

sending data to a device connected on the RS485 trunk.

•RX (green) —Receive, flashes when the EC-BOS-8 UUKL is

receiving data from a device on the RS485 trunk.

These LEDs are also visible when the front access door is opened.

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