Hardware manual

Crest Audio Inc. NexSys v. 3.0

4. Bus Server Installation and Connection

4.1 Installing the Bus Server Card

The Bus Server Card (NS-BUS-1) is an 8-bit ISA expansion card which requires installation

in a vacant slot inside the NexSys host computer. If you are unsure how to insert an ISA card

Device inside your computer, please consult a qualiﬁed computer technician for assistance.

Otherwise, follow these instructions to ensure a safe and speedy installation.

1. Make sure your computer is switched off and disconnected from the electrical

mains. Be sure to use an anti-static mat or other device to reduce the risk of

component failure due to static discharge.

2. Open the computer case & locate a vacant ISA card slot.

3. Remove the mating Phoenix connector from the Bus Server card. The card was

conﬁgured and tested prior to leaving the factory. However, shipping and han-

dling may have caused the rotary address switches to shift so verify that they

are set to F (HI) and 0 (LOW).

Bus Server Card rotary switch locations

Carefully insert the Bus Server card into the slot ensuring that the edge connec-

tor is properly seated and that the Phoenix connector clears the computers rear

panel.

4. Reinstall the outer casing.

5. Afﬁx the NexSys network wire into the mating Phoenix connector and insert it

into the Bus Server card. (See the section Connecting the Bus Server to the

NexSys Bus, below.)

6. Reconnect the AC mains

Connecting the Bus Server to the NexSys Bus

A 3-pin, 5mm removable terminal block (Phoenix Contact 17.5.4.46.5 or equivalent) con-

nector is located on the back of the Bus Server card for connection to the data network. Only

the positive (pin1) and negative (pin2) pins of the connector are used. The third, ground pin

is normally left open. (See Appendix C for a detailed view of Bus Server connections)

Network polarity must be observed when connecting the Bus Server or any other network

device to a NexSys network. If reversed, the network will not operate and NexSys will not

be able to communicate with any network devices.

Software Manual Page 4.1