Hytec Electronics Ltd

VTB 8205 Analogue Input/Output
Transition Board

VME64 extensions / Transition Board

Full EMC shielding and insertion/extraction handles

RP0 and RP2 connections

Handles 48 analogue input/output signals, three external triggers and three external clocks.

Three DC-DC converter sites allow isolated analogue output circuits to be powered externally

Three 50-way SCSI-2 sockets provide ease of connection to three groups of circuitry normally configured for two 16 channel output groups and one 8 channel input group.

Product Description

The VTB 8205 is a 6U (double height) VME rear I/O transition board, which provides connection to the 8002 Carrier Board. It routes the signals from the carrier board to three 50-way SCSI sockets via the J0 and J2 connectors of the VME backplane. The board includes sites for fitting resistors and capacitors associated with the lower 8 channels of each input/output. Optional on-board 5V to 12V DC-DC converters are connected to pins on the RP0/RP2 connectors to facilitate powering the plant side of isolated analogue circuits on IP boards which are mounted on the carrier board.

Construction

The unit is constructed to the VME64x standard, with EMC rear panel, injector/ejector handles, guide pin and slot keying, static discharge protection, hot swap capability, 5-row RP0 and RP2 connectors.

Signal Path

A rear-mounted transition card with three high-density 50-way [SCSI2] connectors transmits/receives all I/O signals and provides direct or conditioned connection provided by pcb jumper settings. The signals connect to the main carrier board according to the VME64x Greenspring pinout for IP module carriers .

SCSI Connectors

Socket 1 (lowest connector)	Outputs 1-16(+/-), Trigger 1(+/-), Clock1(+/-)
Socket 2	Outputs 17-32(+/-),Trigger 2(+/-), Clock2(+/-)
Socket 3 (top connector)	Inputs 33-40(+/-),Trigger3(+/-),Clock3(+/-)
	Outputs 41-48

Analogue Output Connection Details

Signal	VME Connection	SCSI Connection
Signal High 1-16	RP2/A6-A21	Skt1/26-41
Signal Rtn 1-16	RP2/C6-C21	Skt1/1-16
XTrig1 High	RP2/A23	Skt1/43
XTrig1 Low	RP2/C23	Skt1/18
XClk1 High	RP2/A25	Skt1/45
XClk1 Low	RP2/C25	Skt1/20
AGnd		Skt1/24, 25, 49, 50

Signal High 17-32	RP2/D4, D5, Z7, D8, D9, Z11, D12, D13, Z15, D16, D17, Z19, D20, D21, Z23, D24	Skt2/26-41
Signal Rtn 17-32	RP2/Z5, D6, D7, Z9, D10, D11, Z13, D14, D15, Z17, D18, D19, Z21, D22, D23, Z25	Skt2/1-16
XTrig2 High	RP2/Z27	Skt2/43
XTrig2 Low	RP2/D27	Skt2/18
XClk2 High	RP2/D29	Skt2/45
XClk2 Low	RP2/D30	Skt2/20
AGnd		Skt2/24, 25, 49, 50

Signal High 33-48	RP0/A11, C11, E11, B12, D12, A13, C13, E13, A1, C1, E1, B2, D2, A3, C3, E3,	Skt3/26-41
Signal Low 33-48	RP0/B11, D11, A12, C12, E12, B13, D13, A14, B1, D1, A2, C2, E2, B3, D3, A4	Skt3/1-16
XTrig3 High	RP0/E17	Skt3/43
XTrig3 Low	RP0/A18	Skt3/18
XClk3 High	RP0/D18	Skt3/45
XClk3 Low	RP0/E18	Skt3/20
AGnd		Skt3/24, 25, 49, 50

Resistor and Capacitor Network for Filtering

The 8205 provides direct or conditioned connection set by PCB jumper to all transmit/receive I/O signals

The 1K ohm resistors are matched to 0.01%, 1Meg ohms are ±1%.
No filtering components are fitted for IP sites A and B on delivered boards.
Jumpers J33 to J48 select conditioning for IP site C.
Jumpers J49 to J64 select conditioning for IP site D.

PCB JUMPERS

Link between 1 to 2 - filtering selected
Link between 2 to 3 - no filtering, straight through connection.

LK1 connects AGND1 to GND
LK2 connects AGND2 to GND
LK3 connects AGND3 to GND
LK4 connects AGND4 to GND

HYTEC Head Office
Post : 5 Cradock Road, Reading, Berkshire, RG2 0JT, England.
Phone : +44 (0)118 9757770
Fax : +44 (0)118 9757566

Email : sales@hytec-electronics.co.uk

HYTEC HOME PAGE

Copyright © 2002 [Hytec Electronics Ltd]. All rights reserved.
Information in this document is subject to change without notice.
Other products and companies referred to herein are trademarks or registered
trademarks of their respective companies or mark holders.
send mail to paul@hytec-electronics.co.uk with questions or comments about this web site.

Last modified: July 27, 2005