[F1 [F2 ANNEX I B U.K. REQUIREMENTS FOR CONSTRUCTION, TESTING, INSTALLATION AND INSPECTION

Textual Amendments

F1 Inserted by Council Regulation (EC) No 2135/98 of 24 September 1998 amending Regulation (EEC) No 3821/85 on recording equipment in road transport and Directive 88/599/EEC concerning the application of Regulations (EEC) No 3820/85 and (EEC) No 3821/85.

F2 Substituted by Commission Regulation (EC) No 1360/2002 of 13 June 2002 adapting for the seventh time to technical progress Council Regulation (EEC) No 3821/85 on recording equipment in road transport (Text with EEA relevance).

Appendix 6 EXTERNAL INTERFACES

1. HARDWARE U.K.

1.1. Connector U.K.

[INT_001] The downloading/calibration connector shall be a six pin connector, accessible on the front panel without the need to disconnect any part of the recording equipment, and shall comply with the following drawing (all dimensions in millimetres):

The following diagram shows a typical six pin mating plug:

1.2. Contact allocation U.K.

[INT_002] Contacts shall be allocated in accordance with the following table:

Pin	Description	Remark
1	Battery minus	Connected to the battery minus of the vehicle
2	Data communication	K-line (ISO 14 230-1)
3	RxD — Downloading	Data input to recording equipment
4	Input/output signal	Calibration
5	Permanent power output	The voltage range is specified to be that of the vehicle power minus 3V to allow for the voltage drop across the protective circuitry Output 40 mA
6	TxD — Downloading	Data output from recording equipment

1.3. Block diagram U.K.

[INT_003] The block diagram shall comply with the following:

2. DOWNLOADING INTERFACE U.K.

[INT_004] The downloading interface shall comply to RS232 specifications.

[INT_005] The downloading interface shall use one start bit, 8 data bits LSB first, one even parity bit and 1 stop bit.

Start bit

:

one bit with logic level 0

Data bits

:

transmitted with LSB first

Parity bit

:

even parity

Stop bit

:

one bit with logic level 1

When numerical data composed by more than one byte are transmitted, the most significant byte is transmitted first and the least significant byte last.

[INT_006] Transmission baud rates shall be adjustable from 9 600 bps to 115 200 bps. Transmission shall be achieved at the highest possible transmission speed, the initial baud rate after a start of communication being set at 9 600 bps.

3. CALIBRATION INTERFACE U.K.

[INT_007] The data communication shall comply to ISO 14 230-1 Road vehicles — Diagnostic systems — Keyword protocol 2000 — Part 1: Physical layer, First edition: 1999.

[INT_008] The input/output signal shall comply with the following electrical specification:

Parameter	Minimum	Typical	Maximum	Remark
U low (in)			1,0 V	I = 750 μA
U high (in)	4 V			I = 200 μA
Frequency			4 kHz
U low (in)			1,0 V	I = 1 mA
U high (out)	4 V			I = 1 mA

[INT_009] The input/output signal shall comply with the following timing diagrams:

Sensor signal (out)
Test signal (in)
UTC clock signal (out)	] ]