Technical data

ASTi DACS: Operation & Maintenance Manual (Version 4, Rev. B.1) www.asti-usa.com

Appendix A: Interface Deﬁnition

This Appendix summarizes the interface speciﬁcations for all components associated with the

DACS including the various card types which can be installed in the main chassis as well as some

of the external components offered such as RIUs and AIUs.

Additional interface information can be found in the engineering drawings shipped with the sys-

tem, various application notes, and individual user/installation guides shipped with the equipment

Model Processor Interface

The Model Processor includes the chassis, power supply, backplane, CPU, ﬂoppy and hard drive.

Power

Connector Type:

Standard 3 pin IEC connector is used for AC Power. The power supply is either autosensing or

switchable between 115 and 230VAC.

Current Requirements:

The DACS draws less than 4 A from a 115V 60 Hz earth grounded, three wire utility outlet with

no monitor connected. Typical monitors usually draw between 1 and 2 amps at 115V.

Video

Video connection is made through a female 15-pin subminiature “D” connector. The video signal

is VGA. The video connector is in the rear of the chassis.

Keyboard

For 2U and 4U systems, the keyboard connection is made either through a 5-pin DIN (AT-style)

located on the front or rear of the chassis or via a 6-pin mini-DIN (PS/2-style) located on the CPU

card itself. Any standard 101 key PC keyboard can be used, however, the connector type should be

checked to ensure that no adapter is needed.

For MicroDACS systems, the keyboard connection is made through the USB connector on the

CPU. A standard, 101-key USB keyboard may be used.

Chassis

The 2U chassis is a 3.5”- high, 19” rackmountable chassis, which is approximately 17 inches

wide (without rackmount brackets) and 17.5 inches deep.

The 4U chassis is a 7”-high 19” rackmountable chassis, which is approximately 19 inches wide

and 17 inches deep.

While both chassis styles can be bolted directly to rack rails, it is recommended that additional

angle brackets be installed beneath the unit for easier installation and support.

The MicroDACS chassis is a 2.3”-high chassis, which is approximately 6.5 inches wide and 5.4

inches deep. The MicroDACS can be rackmounted in a separately-purchased, 2U-high rackmount

bracket, which can accommodate two MicroDACS systems.

See Appendix B for additional mechanical information.