OHAUS CKW Series Bedienungsanleitung

Juego opcional de Relevador CKW para el

modelo de Indicador CKW-55 y para

las básculas de la serie CKW

Instrucciones de instalación y operación

Juego de relevador de corriente alterna, N/P 71167967

Juego de relevador de corriente directa, N/P 71173377

Kit opzionale relè CKW per l'indicatore

modello CKW-55 e per le bilance della

serie CKW

Istruzioni per l'installazione e

il funzionamento

Kit relè in CA, N/P 71167967

Kit relè in CC, N/P 71173377

CKW Relay Option Kit for Model

CKW-55 Indicator and CKW Series Scales

Installation and Operation Instructions

AC Relay Kit, P/N 71167967

DC Relay Kit, P/N 71173377

CKW-Relais-Optionssatz für Indikator Modell

CKW-55 und Waagen der CKW-Serie

Installations- und Bedienungsanweisungen

Wechselstrom-Relaissatz, Teilenr. 71167967

Gleichstrom-Relaissatz, Teilenr. 71173377

Kit d’option de relais CKW pour l’indicateur

CKW-55 et les balances de la série CKW

Instructions d’installation et d’exploitation

Kit du relais CA, réf. 71167967

Kit du relais CC, réf. 71173377

1 COVER.pmd 3/21/2005, 2:16 PM1

CKW Relay Option Kit EN-1

INTRODUCTION

Two optional Relay Kits are available for CKW Series Indicators and Scales. The

AC Relay Kit is used for controlling up to three external AC circuits. The DC Relay

Kit is used for controlling up to three external DC circuits. Each solid-state relay

output is equivalent to a single pole, single throw switch (SPST). Each relay

circuit is protected by a replaceable fuse.

When installed, system software allows the relays to be programmed in a variety

of ways. Optional set ups include: Normally open or normally closed simulation,

on-off or on-hold sequencing, simultaneous, break-before-make (BBM) or make-

before-break (MBB) contact switching.

Each kit contains a PC board, 2 cables, 6 mounting screws, metal cover, cable tie

and this instruction manual.

BASIC APPLICATIONS

With the Relay Option board installed, external devices can be coordinated to

work with the system’s bar graph display.

• Relay Out 0 corresponds to the Yellow Under Bar graph section.

• Relay Out 1 corresponds to the Green Accept Bar graph section.

• Relay Out 2 corresponds to the Red Over Bar graph section.

Applications include: driving external Over/Accept/Under displays, motor controls

for semi-automatic filling systems, sorting systems, interfacing to industrial PLC

systems, etc. The Relay outputs can also be used as slave relays to drive higher

power relays in larger systems.

CAUTION: Read all safety warnings before installing, making

connections, or servicing the Relay option PCB. Failure to comply

with these warnings could result in personal injury and/or property

damage. Retain all instructions for future reference.

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EN-2 CKW Relay Option Kit

RELAY OUTPUT SPECIFICATIONS

Relay Output Voltage Rating Current Rating Fuse rating Off State Leakage

AC 24-240 VAC 2A* 2.5A / 250V 5 mA max

DC 5 – 60 VDC 2A* 2.5A / 250V 1 mA max

Relay Output Voltage Drop Isolation Load type

AC 1.6 VAC 4000V Optical Resistive or Inductive*

DC 1.5 VDC 4000V Optical Resistive or Inductive*

* For a dynamic motor current rating, the nominal current should be limited to 1.5A.

AC relays are zero crossing turn-on, solid-state type.

INSTALLATION

CAUTION:The installation and wire connections to the Relay option

board should only be done by authorized and qualified personnel,

such as an Electrician.

WARNING: BEFORE MAKING CONNECTIONS TO THE RELAY TERMINALS,

POWER OFF THE SYSTEM AND REMOVE ALL EXTERNAL AC POWER

CONNECTIONS. IF THE SYSTEM CONTAINS AN OPTIONAL RECHARGEABLE

BATTERY SYSTEM, BE SURE THAT THE ON/ZERO

OFF

BUTTON ON THE

INDICATOR IS USED TO FULLY TURN OFF THE SYSTEM AFTER REMOVING THE

AC POWER PLUG

WARNING: WHEN MAKING ANY LINE VOLTAGE CONNECTIONS TO THE AC

RELAY OPTION, FOLLOW NATIONAL ELECTRICAL CODE (NEC) OR LOCAL

AUTHORITY WIRING STANDARDS AND SAFETY PRACTICES.

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CKW Relay Option Kit EN-3

WARNING: ELECTRICAL SHOCK HAZARD EXISTS WITHIN THE HOUSING. THE

HOUSING SHOULD ONLY BE OPENED BY AUTHORIZED AND QUALIFIED

PERSONNEL. REMOVE ALL POWER CONNECTIONS TO THE UNIT BEFORE

OPENING. IF THE UNIT CONTAINS AN OPTIONAL RELAY CONTROL BOARD,

ADDITIONAL AC OR DC POWER CONNECTIONS MAY EXIST WITHIN THE HOUSING.

• Mount the PC board to the rear plate as shown in Figure 1 using 4

of the small screws supplied.

Cable Installation

• Connect the long cable supplied with the kit to connector J10 on the main PC

board. Connect the other end of the cable to either connector at the top of the

Relay Board. (See Figure 1). Using the cable tie supplied, attach the cable

to the plastic mount at the bottom of the housing. (Other cables may already

be attached to this same mount.) If the optional RS422/485 board has been

previously installed, do not use the long cable, instead use the short cable

supplied in the kit to connect the Relay Board to the similar connector on the

RS485 board.

Relay Board Installation

Opening the Indicator Housing

• Unfasten the 4 side screws of the Indicator housing, pull the front housing

section forward.

Figure 1. Relay Output Board Connections.

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EN-4 CKW Relay Option Kit

Making External Connections to the Relays

IMPORTANT: When connecting any AC line supplied device to the Relay

Option PCB, insure that each external device utilizes a properly

grounded AC connection.

• For connections to nominal 120 VAC or 220-240 VAC systems, use only

insulated wire sets rated to the local electrical code requirements.

• The wire set used for connection to the relay option PCB should be part of a

multi-conductor cable with a smooth, round outer insulating jacket.

• Do not run more than one cable through the watertight fitting.

• Do not run other low voltage wires within the same cable set that connects

to the Relay connections.

• The overall cable diameter must be between 0.157 in. to 0.315 in.,

(4 mm to 8 mm).

• The terminal connections require wire sizes in the range of 26 to 16 AWG,

(0.14 mm2to 1.5 mm2). Wire ends are stripped to 0.25 in. (6 mm). Follow

Figure 2 to strip cable and wire ends to the correct lengths.

• The cable from the Relay terminals must be routed directly to the watertight

fitting at the left side of the Indicator housing. This is the closest fitting just

below the Relay PCB. See Figure 1.

Figure 2. Cable Preparation.



*NOTE: Install the Cable Tie after inserting the cable through the liquid-tight fitting.

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CKW Relay Option Kit EN-5

Figure 3. Relay Output

Board Contact Diagram.

• Each relay output has two terminals, connect each

wire pair to be switched to each set of terminals. See

Figure 3, for a relay contact diagram.

• For DC relay boards, make sure the polarity is correct.

• The DC Relay PCB can only be used with DC circuits.

• The AC Relay PCB can only be used with AC circuits.

• After making the proper connections, tighten the

external nut of the liquid-tight connector securely

around the cable.

• Install the Relay Terminal Cover as shown in

Figure 4 using the two screws supplied.

• The relay connections provide a switch closure only, AC or DC power must be

supplied externally.

• For reference, Appendix A shows typical examples of wiring to the relays.

Making External Connections to the Relays (Cont.)

Figure 4. Relay Output Board With Cover in Place.

CAUTION: Do not operate the Relay Option without the terminal cover

in place.

IMPORTANT: Review the I/O menu before using the relay option board

to control external devices.

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EN-6 CKW Relay Option Kit

Reassembly

• Before re-assembly, check that the liquid-tight connector is fully tighted.

• Check that no wires or cabling will be pinched when the two housing

sections are closed.

• Lift the front housing section back into place over the rear housing section.

• Replace the 4 side screws*.

*Note: It may be necessary to apply a moderate clamping pressure to the two

housing halves while replacing the side screws. This pressure compresses a

rubber gasket and insures the proper water tight seal for the housing.

When properly installed, the Relay Option board is automatically detected by the

system’s software. Installation is confirmed during the power on display

sequence with the message “ ”.

I/O (Section 3.6.6)

Reset: No, Yes

External Input: Off, Tare, Zero, Print,

Units, GNT, Accumula-

tion, Start-Stop,Tare-

Start-Stop

Input Beep: Off, On

Relay Output: Type, Sequence, Contact

End

Figure 5 illustrates the I/O Menu that is used

to configure the optional input and output

device parameters, (Relay Output control

and an External Input signal, such as a foot

switch input). This section is a copy of the

information appearing in the CKW Indicator

Instruction manual.

Figure 5. I/O Menu.

OPERATION

Menu Settings

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CKW Relay Option Kit EN-7

Reset

Allows resetting the current menu to factory defaults.

NOTE: Factory default settings are shown in bold.

Selections are: No, Yes.

External Input (INPUT)

Allows selection of a function to be controlled by an optional

external input device such as a foot switch. An external input

device would be connected to J7 of the Main PC board.

Only the two menu selections related to Relay operation are listed below:

= Start-Stop (S-S*) = The first input signal enables the output relay

operation, (Start). The second signal disables the relay operation,

(Stop).

= Tare-Start-Stop (T-S-S*) = The first input signal initiates a Tare

function. The second signal enables the output relay operation,(Start).

The third input signal disables the relay operation, (Stop).

*NOTE: The Start function will enable the relay operation even if the bar graph is

not currently showing the under condition near a weight value of zero.

s-s

t-s-s

Relay Output (OUTPUT)

Allows the configuration of relay output parameters.

Selections are: Type, Sequence, Contact.

Menu Settings (Cont.)

In general, menus are entered and menu items are selected by pressing the “Yes”

navigation button*. Menus are skipped and menu items are rejected by pressing

the “No” navigation button*.

* The navigation function of each button is shown with a diagonal line to the

function name.

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EN-8 CKW Relay Option Kit

Sequence (SEQ)

Allows alteration of the relay operating sequence as the weight

reading changes from under / accept / over.

Selections are: Normal, hold.

Normal = The previously enabled relay will be disabled as

the next relay is enabled.

Hold = The previously enabled relay will hold the same

state as the next higher relay is enabled.

Contact (CONTAC)

Allows alteration of relay contact closure.

Selections are: Sim, BBM, MBB.

Sim = Simultaneous. Relays open or close at the same time.

BBM = Break-Before-Make contact style.

MBB = Make-Before-Break contact style.

END (-END-)

Represents the end of the menu.

*NOTE: The normally closed condition is only active while the Indicator is

powered on. When powered off, the relays return to a normally open condition.

Type (TYPE)

Allows the selection of normally open or normally closed relay

functions. Selections are Open, Closed*.

OpenOpen

Open = The initial state of the Relay output is normally open.

Closed = The initial state of the Relays output is normally closed.

2 TEXT-EN.pmd 3/21/2005, 2:16 PM8

CKW Relay Option Kit EN-9

REPLACEMENT PARTS

Description Part Number

AC Relay Printed Circuit Board 71169512

DC Relay Printed Circuit Board 71152477

Fuse, Radial, 2.5A/250V, TR5 71173386

Long Option Cable 71170778

Short Option Cable 71170779

Service Information

For Service assistance in the United States and Canada, please call Ohaus

Corporation toll free at (800) 526-0659 from 8 AM to 5 PM Eastern Time. An

Ohaus Product Service Specialist will be available to help you.

FUSE REPLACEMENT

WARNING: ELECTRICAL SHOCK HAZARD EXISTS WITHIN THE HOUSING. THE

HOUSING SHOULD ONLY BE OPENED BY AUTHORIZED AND QUALIFIED

PERSONNEL. REMOVE ALL POWER CONNECTIONS TO THE UNIT BEFORE

OPENING. IF THE UNIT CONTAINS AN OPTIONAL RELAY CONTROL BOARD,

ADDITIONAL AC OR DC POWER CONNECTIONS MAY EXIST WITHIN THE

HOUSING.

To replace a burned fuse: After opening the housing, first remove the terminal

cover. Replace the burned fuse*. Reinstall the terminal cover. Reassemble the

housing.

*For continued protection, replace fuses only with the recommended type, (see

section: “REPLACEMENT PARTS”).

2 TEXT-EN.pmd 3/21/2005, 2:16 PM9

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