ISO/IEC TR 10192-2:2000

Information technology - Home Electronic System (HES) interfaces - Part 2: Simple Interface Type 1

A Simple Interface (SI) is an interface between devices and a home network in the Home Electronic System (HES). The SI type 1 connects simple devices offering and accepting only a two state signal to an HES home network. Two signals are available at the SI type 1. One is a control signal for turning the device on and off. The other is a monitor signal for checking the state of the device. This part of ISO/IEC 10192 specifies the mechanical, electrical, functional and procedural characteristics of a specific Simple Interface (SI). The SI type 1 is a physical interface realized between the SI type 1 device and the SI type 1 Network Access Unit, NAU. It also serves as a reference point.

General Information

• Status: Published
• Publication Date: 24-Oct-2000
• ICS: 35.200 - Interface and interconnection equipment
• Technical Committee: ISO/IEC JTC 1/SC 25 - Interconnection of information technology equipment
• Current Stage: PPUB - Publication issued
• Start Date: 25-Oct-2000
• Completion Date: 31-Jan-2001

Overview

ISO/IEC TR 10192-2:2000 - "Information technology - Home Electronic System (HES) interfaces - Part 2: Simple Interface Type 1" defines a compact, standardized physical interface (SI type 1) for connecting simple two‑state devices (on/off) to a Home Electronic System (HES) network. The report specifies the mechanical, electrical, functional and procedural characteristics of the interface between an SI device and an SI Network Access Unit (NAU), including pin assignments, signal forms, safety isolation and basic test procedures.

Key topics and technical requirements

• Signal types and pin assignments
  • Two signals: Control (C1 high / C2 low) and Monitor (M1 high / M2 low).
  • Connector pin order (device/NAU): pin 1 = M2, pin 2 = M1, pin 3 = C2, pin 4 = C1.
• Electrical characteristics
  • Defined detect, maximum and leak currents for control and monitor conductors (e.g., detect current < 2 mA; max control current 5 mA).
  • Voltage limits consistent with Safety Extra Low Voltage (SELV) requirements (refer IEC 60664).
• Signal timing and forms
  • Static monitor: high=on, low=off.
  • Dynamic monitor: device on is represented by a pulsed waveform; dynamic period ≤ 20 ms; pulse duration 200–300 ms used for control; response time ≤ 350 ms; other timing ratios specified.
• Isolation and safety
  • Safety isolation requirements per IEC 60364 and IEC 60664; SELV between conductors and earth.
  • Annex A gives a photocoupler‑based isolating implementation example.
• Mechanical and connector details
  • Standard cable/connector details in Annex B; nominal cable length 2 m (no fixed maximum if electrical requirements met); operating temperature −25 °C to 85 °C.
• Testing
  • Functional and short‑circuit test procedures described; test conditions reference IEC 60068‑2 and IEC 60950.

Applications and users

ISO/IEC TR 10192-2:2000 is intended for:

• Manufacturers of simple home devices (switches, relays, binary sensors, actuators) that require a standardized two‑state interface to a home network.
• HES network equipment vendors and NAU designers implementing physical interfaces and isolation.
• System integrators and smart‑home installers needing consistent pinouts and test methods.
• Conformity and test laboratories performing functional and safety verification against HES interface criteria.

Practical uses include low‑complexity device integration, retrofit modules for legacy devices, and creating interoperable peripheral modules for smart‑home controllers.

Related standards

• IEC 60364 (electrical installations)
• IEC 60664 (insulation coordination / SELV)
• IEC 60068‑2 (environmental testing)
• IEC 60950 (IT equipment safety)

Keywords: ISO/IEC TR 10192-2:2000, Simple Interface Type 1, SI type 1, Home Electronic System, HES interfaces, NAU, control signal, monitor signal, SELV, photocoupler, connector pinout.

Standards Content (Sample)

TECHNICAL ISO/IEC
REPORT
TR 10192-2
First edition
2000-10
Information technology –
Home Electronic System (HES) interfaces –
Part 2:
Simple Interface Type 1
Reference number
TECHNICAL ISO/IEC
REPORT – TYPE 2
TR 10192-2
First edition
2000-10
Information technology –
Home Electronic System (HES) interfaces –
Part 2:
Simple Interface Type 1
 ISO/IEC 2000
All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized in any form or by any
means, electronic or mechanical, including photocopying and microfilm, without permission in writing from the publisher.
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– 2 – TR 10192-2 © ISO/IEC:2000(E)
CONTENTS
Page
FOREWORD . 4
INTRODUCTION .6
Clause
1 Scope . 7
2 Normative references. 7
3 Definitions. 7
4 Abbreviations. 8
5 Basic principles of the Simple Interface type 1 (SI type 1). 9
6 Functional characteristics of the SI type 1. 10
6.1 Signal types and pin assignments . 10
7 Electrical characteristics of the SI type 1. 11
7.1 Currents and voltages on the SI type 1 conductors . 11
7.2 Signal forms at the SI type 1. 12
7.3 Maximum allowed voltages on the SI type 1 conductors. 12
7.4 Isolation characteristics . 12
8 Mechanical characteristics of the SI type 1 . 13
9 Safety of SI type 1 devices and NAUs. 13
10 Testing of SI type 1 devices . 13
10.1 Test conditions . 13
10.2 Test circuit for the SI type 1 device . 13
10.3 Functional test of SI type 1 devices. 13
10.4 Short circuit test for SI type 1 devices. 13
Annex A (informative)  Photocoupler based implementation . 14
Annex B (informative) Characteristics of the SI type 1 connector. 15
B.1 SI type 1 device and NAU connector mechanical characteristics. 15
B.2 Connector ratings . 16
Bibliography . 17

TR 10192-2 © ISO/IEC:2000(E) – 3 –
Figure 1 – Basic reference model for the SI type 1 . 9
Figure 2 – Signals passing the SI type 1. 10
Figure 3 – Currents and voltages on the SI type 1 conductors . 11
Figure 4 – Signal forms at the SI type 1. 12
Figure 5 – SI type 1 device testing . 13
Figure A.1 – Basic configuration. 14
Figure B.1 – SI type 1 device and NAU connector (male) . 15
Figure B.2 – SI type 1 cable connector (female) . 16
Table 1 – Signal type, symbols, potentials and pin assignments for the SI type 1 . 10
Table 2 – Electrical characteristics of SI type 1 . 11

– 4 – TR 10192-2 © ISO/IEC:2000(E)
INFORMATION TECHNOLOGY –
HOME ELECTRONIC SYSTEM (HES) INTERFACES –
Part 2: Simple Interface Type 1
FOREWORD
1) ISO (International Organization for Standardization) and IEC (International Electrotechnical Commission) form
the specialized system for worldwide standardization. National bodies that are members of ISO or IEC
participate in the development of International Standards through technical committees established by the
respective organization to deal with particular fields of technical activity. ISO and IEC technical committees
collaborate in fields of mutual interest. Other international organizations, governmental and non-governmental,
in liaison with ISO and IEC, also take part in the work.
2) In the field of information technology, ISO and IEC have established a joint technical committee,
ISO/IEC JTC 1. Draft International Standards adopted by the joint technical committee are circulated to national
bodies for voting. Publication as an International Standard requires approval by at least 75 % of the national
bodies casting a vote.
3) Attention is drawn to the possibility that some of the elements of this International Standard may be the subject
of patent rights. ISO and IEC shall not be held responsible for identifying any or all such patent rights.
The main task of IEC and ISO technical committees is to prepare International Standards. In
exceptional circumstances, a technical committee may propose the publication of a technical
report of one of the following types:
• type 1, when the required support cannot be obtained for the publication of an
International Standard, despite repeated efforts;
• type 2, when the subject is still under technical development or where, for any other
reason, there is the future but not immediate possibility of an agreement on an
International Standard;
• type 3, when the technical committee has collected data of a different kind from that which
is normally published as an International Standard, for example ‘state of the art’.
Technical reports of types 1 and 2 are subject to review within three years of publication to
decide whether they can be transformed into International Standards. Technical reports of
type 3 do not necessarily have to be reviewed until the data they provide are considered to be
no longer valid or useful.
ISO/IEC 10192-2, which is a technical report of type 2, was prepared by subcommittee 25:
Interconnection of information technology equipment, of ISO/IEC joint technical committee 1:
Information technology.
This publication was drafted in accordance with ISO/IEC directives, Part 3.
This document is issued in the type 2 technical report series of publications (according to
15.2.2 of the Procedures for the technical work of ISO/IEC JTC 1 (1998)) as a prospective
standard for provisional application in the field of the Home Electronic System (HES),
because there is an urgent requirement for guidance on how standards in this field should be
used to meet an identified need.
This document is not to be regarded as an International Standard. It is proposed for
provisional application so that information and experience of its use in practice may be
gathered. Comments on the content of this document should be sent to IEC Central Office.

TR 10192-2 © ISO/IEC:2000(E) – 5 –
A review of this type 2 technical report will be carried out not later than three years after its
publication with the option of extension for a further three years or conversion either to an
International Standard or withdrawal.
This document which is purely informative is not to be regarded as an International Standard.
Annexes A and B are for information only.

– 6 – TR 10192-2 © ISO/IEC:2000(E)
INTRODUCTION
A Simple Interface (SI) is an interface between devices and a home network in the Home
Electronic System (HES).
The SI type 1 connects simple devices offering and accepting only a two state signal to an
HES home network. Two signals are available at the SI type 1. One is a control signal for
turning the device on and off. The other is a monitor signal for checking the state of the
device.
ISO/IEC 10192: Information technology – Home Electronic System (HES) interfaces presently
consists of two parts:
• Part 1: Universal interface class 1
• Part 2: Simple interface type 1

TR 10192-2 © ISO/IEC:2000(E) – 7 –
INFORMATION TECHNOLOGY –
HOME ELECTRONIC SYSTEM (HES) INTERFACES –
Part 2: Simple Interface Type 1
1 Scope
This part of ISO/IEC 10192-2 specifies the mechanical, electrical, functional and procedural
characteristics of a specific Simple Interface (SI). The SI type 1 is a physical interface
realized between the SI type 1 device and the SI type 1 Network Access Unit, NAU. It also
serves as a reference point.
2 Normative references
The following normative documents contain provisions which, through reference in this text,
constitute provisions of this part of ISO/IEC 10192. For dated references, subsequent
amendments to, or revisions of, any of these publications do not apply. However, parties to
agreements based on this part of ISO/IEC 10192 are encouraged to investigate the possibility
of applying the most recent edition of the normative documents indicated below. For undated
references, the latest edition of the normative document referred to applies. Members of IEC
and ISO maintain registers of currently valid International Standards.
IEC 60364, Electrical Installations of buildings
IEC 60664 (all parts), Insulation coordination for equipment within low-voltage systems
IEC 60068-2 (all parts), Environmental testing
IEC 60950, Safety of information technology equipment
3 Definitions
For the purpose of this Technical Report the following definitions apply.
3.1
simple interface
interface above the application layer to be used for and by simple devices such as actuators
and sensors within an HES
The SI type 1 offers only one/zero commands and accepts only one/zero entries. The
specification of the SI type 1 includes the necessary mechanical, electrical, functional and
procedural characteristics of the interface.
3.2
process interfaces
a family of interfaces above the application layer between a home network and the devices to
be connected to it
3.3
SI network access unit, SI NAU
NAU supporting and offering an SI

– 8 – TR 10192-2 © ISO/IEC:2000(E)
3.4
SI device
device supporting and offering an SI
3.5
SI conductors
conductors connecting an SI NAU and an SI device
3.6
SI connection
connection point between the SI cable (where applicable) and the SI device
3.7
isolating func
...