Yamaha ACD1 - page 6

ACD1 Reference Manual

Controls and Connectors

yGround screw

The AC power cord is a 3-wire type. If the AC outlet used is earthed (grounded), this device will be properly earthed as well.

Also, grounding the screw sometimes reduces hum and interference noise.

u[AC IN] connector

Connect to the AC mains using the supplied AC power cable.

First connect the power cord to the ACD1, then insert the power cord plug into an AC outlet.

i[NETWORK] connector

This is a 100Base-TX/10Base-T Ethernet connector for connection to a computer or other device in the network.

•Use a UTP cable or STP cable for connection to the [NETWORK] connector. (Use an STP cable in countries where FCC

regulations apply.) Since the ACD1 supports Auto MDI/MDI-X, it will automatically detect whether the connected cable is

of the straight type or crossover type, and will conﬁgure itself to create the appropriate connection. Therefore, you can

use either a straight or crossover cable.

•The maximum length of a cable between a network switch and the ACD1 is 100 meters. Due to the quality of cables and

network switch performance, however, proper operation at the maximum length cannot be guaranteed in some cases.

o[GPI] connector

This Euroblock connector provides access to the unit’s GPI (General Purpose Interface) interface for transfer of control sig-

nals to and from external equipment. The ACD1 provides 4-port input and 4-port output. The +V terminals have an output

voltage of 5 volts. The IN terminals detect voltage changes from 0V to 5V. The OUT terminals are open-collector outputs,

and change between Open and Close. For details on connections and usage, refer to “Connector wiring” (page 18). For

details on calibrating the [GPI IN] connectors, refer to “Utility” (page 13).

!0 [FAULT OUTPUT] connectors

This is a Euroblock connector that can inform an external device when an abnormality occurs with the ACD1’s CPU, or

when there is an event for which Fault Output has been speciﬁed in the Alert Setup dialog box of Amp Editor. For details on

connections and usage, refer to “Connector wiring” (page 18).

!1 [DATA PORT] connector

This is an RJ-45 connector that can be connected to a maximum of 32 PC-N/Tn series units so that they can be monitored/

controlled from the ACD1. You can use CAT5 or better UTP straight cables to make daisy-chain connections for a maxi-

mum of 500 meters.

The Amp ID of ampliﬁers connected to this connector must be set to non-overlapping numbers in the range of 0 to 31.

• Use a UTP cable in which all eight pins are connected.

!2 [MONITOR/REMOTE] connector

These are D-Sub 15-pin connectors that allow up to eight XP/XH/XM series units to be connected so that they can be mon-

itored/controlled from the ACD1. You can use three-row D-Sub 15-pin straight cable to make a connection for a maximum

of 50 meters.

Ampliﬁers connected to these connectors will be assigned an Amp ID between 32 and 39 according to the connector to

which they are connected.

Rear Panel

o!0 !1

yu i !2

NOTE