Replacement of AS-J89X-X0X Adapters

Overview

The ASP890300 is not physically compatible if installations use the following adapter models.

AS-J890-001	AS-J892-001
AS-J890-002	AS-J892-002
AS-J890-101	AS-J892-101
AS-J890-102	AS-J892-102

In these installations, you will need to:

replace the primary backplanes (housings)
perform power calculations to determine if additional supplies are needed (see I/O Module Current Requirements)
consider backplane interconnection cables
review ASCII port and coaxial cable connection

Primary Backplane Replacement

ASP890300 modules are compatible with:

AS-H810-208 (10", ASP890300 plus three I/O modules)*
AS-H810-209 (10", ASP890300 plus three I/O modules)*
AS-H819-209 (19", ASP890300 plus six I/O modules)
AS-H827-209 (27", ASP890300 plus ten I/O modules)

*Repair/service exchange only.

Power Considerations

If the primary backplane power requirements exceed the ASP890300 capabilities, enough I/O modules must be removed from the primary backplane to bring the current load within specified limits. In this case, an additional backplane and power supply will need to be added in the configuration unless the extra modules can be added to an existing powered backplane. For further reference, see Power Supply Capacities in Remote Drop Secondary Applications and I/O Module Current Requirements.

Secondary backplanes AS-H819-100 and AS-H827-100 support 7 and 11 I/O modules, respectively. Subtract two modules if power supplies need to be added.

Backplane Interconnection Cables

See Backplane Interconnection Diagrams for appropriate configurations.

ASCII Port Pinout Comparison

The following table shows how the ASCII port pinouts are used on the J892 and ASP890300.

Terminal	J892 (25 pin)	ASP890300 (9 pin)
1	Shield	Not Used
2	TXD	RXD
3	RXD	TXD
4	RTS	DTR
5	CTS	SGND
6	DSR	DSR
7	Ground	RTS
8	Not Used	CTS
20	DTR	N/A

The ASP890300 connector shell is chassis ground.

Coaxial Cable Interconnection/Terminations

AS-J89X-00X Remote I/O Adapters - These have BNC type connectors which are not compatible with the F style connections on ASP890300 modules. Installers may use BNC Jack to Male "F" Connector Adapters, part number 52-0724-000. The external 75Ω terminator added in series with the coax drop cable must be removed as the ASP890300 is terminated internally.

AS-J890-10X Remote I/O Adapters are compatible in this respect. They have "F" type coaxial cable connectors and are terminated internally.