Technical data

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

Monitor Connection

For convenience, some 2U and/or 4U power supplies provide a power connection for the monitor

on the rear of the chassis. This connection allows the monitor to be plugged directly into your

DACS. Power cords to ﬁt this connection can be purchased for your monitor from your local com-

puter store or distributor. The monitor may also be connected to an independent power strip.

With the Monitor connected directly to the DACS, the DACS draw less than 5.5A @ 115VAC for

most types of monitors.

After your monitor AC power cord is installed, connect the video cable to the 15 pin, sub-minia-

ture “D” connector found on the rear of the DACS.

Keyboard Connection

On the 2U and 4U systems, the keyboard connection is either via a 5-pin DIN (AT-style) connec-

tor on the front of the DACS chassis, a 5-pin DIN (AT-style) connector on the rear of the DACS

chassis, or via direct connection to the CPU board keyboard connector which is generally a 6-pin

mini DIN (PS/2-style). The MicroDACS accommodates a standard USB keyboard. Use of a PS/2-

to-USB adapter is NOT recommended.

On all systems, the DACS is conﬁgured to boot and operate properly with or without the keyboard

connected.

TDM Ring and RIUs

Systems using Remote Interface Units (RIUs) will have one or more TDM Controller cards

installed in the main DACS. Each TDM Controller is used to drive one digital TDM ring. RIUs

are distributed around the ring, providing remote interface of headsets and other audio equipment.

Multiple versions of RIUs exist, and care should be taken when ordering spares or follow-on sys-

tems, as different RIUs have different features and ﬁrmware versions. The version number is indi-

cated in the part number (e.g., RIU-4-AA indicates a version 4.1 RIU with version X.X.X

ﬁrmware).

RIU Installation and Conﬁguration: Before installing RIUs, each unit on a TDM ring must be

conﬁgured with a unique address. The address switch is accessible from the outside of the unit.

Valid addresses are from 1-16 (1-F in hexadecimal).

If control panels or other serial devices will be connected to the RIUs consult any ASTi installa-

tion drawings or notes provided as the panels may need to be associated with a speciﬁc RIU

address.

After the address is set the user may also need to conﬁgure the input gain. See the following sec-

tion on audio equipment connection for further details.

Once the RIUs are conﬁgured they can be physically installed. Physical dimensions are provided

in Appendix B. A conﬁguration and installation guide is also provided with each RIU unit

The unit is approximately 1.5” x 5.5” x 8.5”, small enough to be mounted in space limited areas.

The unit can also be conveniently placed on a desktop. An optional 19” rackmount bracket is

available which allows up to three RIUs to be mounted in1U (1.75”) of rack space. Note that no

mounting brackets or hardware are supplied with the unit.