Banner Extension Modules User Manual

Model EM-T-7A Extension Module

One- or two-channel control for use with a Primary Safety Device

Printed in USA P/N 54208B0B

Features

• Extension Module provides additional safety outputs for a Primary Safety Device
(for example, an E-stop Safety Module or a 2-hand control module), if controlled
and monitored by this device

• Features four 6-amp switching channels for connection to control-reliable machine
power interrupt circuits

• Four redundant output channels

• Contact status outputs are provided for connection to the Primary Safety Device’s
monitoring input

• 24V dc operation

• Housed in a narrow, 22.5 mm (0.9") DIN-rail-mountable module

• Convenient plug-in terminal blocks

• Design complies with standards UL 991 and EN 60204

Description

The model EM-T-7A Extension Module provides additional forced-guided (positive­guided) relay contacts for a Primary Safety Device, such as an E-stop Safety Module or
a two-hand-control module. Controlled by the safety outputs of the Primary Safety
Device, the EM-T-7A Extension Module provides four redundant outputs. These outputs
may be connected to control-reliable machine power interrupt circuits. Each of the four
Extension Module outputs is a series connection of two forced-guided relay contacts
(K1 and K2 in Figure 3).

The outputs of the Extension Module follow the action of the safety outputs from the
Primary Safety Device which control it, within a switching delay time of approximately
20 milliseconds. The Extension Module’s four outputs are each rated for up to 250V
ac/dc at up to 6A.

The Extension Module offers an output circuit at terminals Y1 and Y2 which provides
K1 and K2 contact status information for connection to the monitoring input of the
Primary Safety Device (see Figure 3). This monitoring circuit prevents the Primary
Safety Device from being reset if contacts of either K1 or K2 of the Extension Module
fail in a shorted condition.

The Extension Module has indicators for input power (green), and status of internal
relays (K1 and K2, both green) (see Figure 1). There are no adjustments and no user­serviceable parts. See page 6 for information regarding repair service.

WARNING . . .

This Extension Module is not a point-of-operation guarding device, as defined by OSHA
regulations. It is necessary to install point-of-operation guarding devices, such as safety light curtains and/or
hard guards, to protect personnel from hazardous machinery. Failure to install point-of-operation guards on
hazardous machinery could lead to serious injury or death.

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Extension Module – Model EM-T-7A

page 2

Banner Engineering Corp. • Minneapolis, U.S.A.
Website: http://www.baneng.com • Tel: [phone]

IMPORTANT NOTICE . . . Read this page before proceeding!

Banner Engineering Corp. has made every effort to provide complete application, installation, operation, and maintenance
instructions. In addition, any questions regarding the use or installation of this Banner Extension Module should be directed to
the factory applications department at the telephone numbers or addresses shown on the back cover.

The user shall ensure that all machine operators, maintenance personnel, electricians, and supervisors are thoroughly familiar
with and understand all instructions regarding the installation, maintenance, and use of this Extension Module, and with the
machinery it controls.

The user and any personnel involved with the installation and use of this Extension Module must be thoroughly familiar with
all applicable ANSI/NFPA standards. The standards, listed below, directly address the use of Primary Safety Devices, by
which the Extension Module can be controlled. Banner Engineering Corp. makes no claim regarding a specific
recommendation of any organization, the accuracy or effectiveness of any information provided, or the appropriateness of
the provided information for a specific application.

The user has the responsibility to ensure that all local, state, and national laws, rules, codes, and regulations relating to the use of
this Extension Module in any particular application are satisfied. Extreme care is urged that all legal requirements have been met
and that all installation and maintenance instructions contained in this manual are followed.

U. S. Standards Applicable to Use of Primary Safety Devices

ANSI B11 Standards for Machine Tools “Safety Requirements for the Construction, Care and Use”

Available from: Safety Director

AMT – The Association for Manufacturing Technology
7901 Westpark Drive
McLean, VA 22101-4269
Tel.: [phone]

NFPA 79 “Electrical Standard for Industrial Machinery (1997)”

Available from: National Fire Protection Association

1 Batterymarch Park, P.O. Box 9101
Quincy, MA 02269-9101
Tel.: [phone]

ANSI/RIA R15.06 “Safety Requirements for Industrial Robots and Robot Systems”

Available from: Robotic Industries Association

900 Victors Way, P.O. Box 3724
Ann Arbor, MI 48106
Tel.: [phone]

European Standards Applicable to Use of Primary Safety Devices

EN 292-1 “Safety of Machinery – Basic Concepts, General Principles for Design

Part 1: Basic Terminology, Methodology”

EN 292-2 “Safety of Machinery – Basic Concepts, General Principles for Design

Part 2: Technical Principles and Specifications”

EN 60204-1 “Electrical Equipment of Machines: Part 1: General Requirements”

Also, request a type “C” standard for your specific machinery.

EN 418 “Safety of Machinery – Emergency Stop Equipment Functional Aspects, Principles for Design”

Available from: Global Engineering Documents

15 Inverness Way East
Englewood, CO 80112-5704
Tel.: [phone]

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Extension Module – Model EM-T-7A

page 3

Banner Engineering Corp. • Minneapolis, U.S.A.
Website: http://www.baneng.com • Tel: [phone]

Supply Protection Circuitry

Application Notes There are no adjustments and no user-serviceable parts. See page 6 for information regarding repair service.

Protected against transient voltages and reverse polarity

Output Configuration Four output channels:

Each channel is a series connection of two forced-guided (positive-guided) relay contacts –
AgNi, gold-flashed

Contact ratings:

Maximum voltage: 250V ac/dc
Maximum current: 6 A ac/dc
Minimum current: 30 mA @ 24V dc
Maximum power: 1500VA, 200 W
Mechanical life: 50,000,000 operations
Electrical life: 100,000 at full resistive load

Feedback contact rating (Y1-Y2): 24V dc @ 0.5A

NOTE: Transient suppression is recommended when switching inductive loads. Install suppressors

across load. Never install suppressors across output contacts (see Warning, page 5).

Output Response Time 20 milliseconds maximum (if channel u-k fails, maximum response time is 200 milliseconds)

Status Indicators 3 green LED indicators:

Power ON
K1 energized
K2 energized

Input Requirements Inputs from Primary Safety Device must each be capable of switching 30 to 250mA @ 13 to 28V dc.

Construction Polycarbonate housing.

Mounting Mounts to standard 35 mm DIN-rail track.

Vibration Resistance 10 to 55Hz @ 0.35 mm displacement per IEC 68-2-6

Operating Temperature 0° to +50°C (+32° to 122°F)

Supply Voltage and Current A1-A2: 24V dc, +/-15%, 10% maximum ripple

Model EM-T-7A Specifications

Environmental Rating Rated NEMA 1, IEC IP20. Extension Module must be installed inside an enclosure rated NEMA 3 (IEC

IP54), or better.

Figure 2. Extension Module enclosure dimensions

Figure 1. EM-T-7A status indicators

Certifications

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22.5 mm

A1 Y1 K1

23 33 43

Power

Ch.1

Ch.2

UY2A2

K1

K2

(0.89")

84.0 mm
(3.31")

118.0 mm
(4.65")

Input Power

ON

K1 Energized

K2 Energized

A1 Y1 K1

13

23 33 43

Power

Machine

Safety

EM-T-7A

Ch.1

Ch.2

14 24 34 44

UY2A2

K1

K2

13

Machine

Safety

EM-T-7A

14 24 34 44