Cabling

SCSI

1. Requirement - Do not attach any external SCSI devices to the onboard SCSI connector of the I/O+ board in card cage slot 1.

2. To add external SCSI devices, use the SBus slots on the I/O+ board, or add a second I/O+ board. You may use either an SBus+ I/O board or a Graphics+ I/O board.

3. Maximum - The maximum length for a chain of single-ended (non-differential) SCSI cables is 6.0 meters (20 feet).

4. Maximum - The maximum length for a chain of differential SCSI cables is 25 meters (82 feet).

Fiber Optic

The minimum bend radius for fiber optic cable is 1.0 inch. The IB has Fibre Channel- Arbitrated Loop (FC-AL) circuitry to support up to eight internal fiber optic disk drives. Two GBICs (in slots LA and UA) on the IB connect through cables to GBICs on the I/O+ board; use a 2-meter cable. The remaining GBIC slots (LB and UB) on the IB can be used for redundant interfacing to another I/O+ board or (with the proper software) to an entirely separate system. Use the fiber cable organizer that came with your E3500 system to help ensure the 1.0 inch bend radius rule is observed.

Ethernet

1. The main Ethernet should be connected to the I/O+ board in slot 1.

2. Each I/O+ board has one Ethernet circuit with both TPE and MII connectors. Only one type of connector may be used at a time.

3. After slot 1 is connected to a network, additional Ethernet connections may be made to I/O+ boards or SBus cards in any other card cage slot.

Video Interface

1. A system that is operated with a monitor can use a graphics adapter mounted on either a Graphics+ I/O board or an SBus+ I/O board.

2. Up to four Graphics+ I/O boards are supported in a system.