ADTRAN E220 HFAC HDSL2 specifications HTU-C Fuse Alarm, Connections, Alarms, Hfac Fuse Alarm

	VIS NO
	VIS C
Critical	VIS NC
	AUD NO
	AUD C
	AUD NC
	VIS NO
	VIS C
Major	VIS NC
	AUD NO
	AUD C
	AUD NC
	VIS NO
	VIS C
Minor	VIS NC
	AUD NO
	AUD C
	AUD NC

Fault T

Locate R

261

272

283

294

305

316

327

338

349

3510

3611

3712

3813

3914

4015

4116

4217

4318

4419

4520

4621

4722

4823

4924

5025

HFAC SLOT

(JP1)

Remote

ACO

Table 5. External HTU-C/HTU-R Alarm Options

(Software-Selectable Only)

(arrow indicates default setting)

Options Screen
Menu Item No.	Function	Description
5	EXT HTU-C/R	Alarms Disables and
Disabled		enables the alarms
		resulting from external
Enabled
		DSX-1 or DS1

HTU-C Fuse Alarm

An alarm may be generated as a result of an HTU-C fuse failure. The HFAC controller will sense the failure and process this alarm event according to switch settings as defined in Table 2.

3. CONNECTIONS

The HFAC plugs into Slot 0 (labeled HFAC) of the ADTRAN E220 shelf. Push firmly to ensure the card seats properly. Connections to the HFAC are made by wire wrap connections to the backplane-mounted connector. JP1 is the primary interface connector for the HFAC. Figure 5 shows the wire-wrap connector terminal pin assignments.

Alarms

A set of alarm contacts is provided through backplane wire-wrap connections (Figure 5). Wiring can be made to the appropriate pins on JP1 for normally open

NO: Normallly Open Position

NC: Normally Closed Position

C:Common

Figure 5. HFAC Wire-Wrap Pin-Out Design

resulting from blown fuses in the HFAC, HTU-C, or HCOT units, or from communications failure between any HTU-C and the HFAC. Alarm severity and threshold value can be provisioned for the errored second, severely errored second, and unavailable second parameters.

An option available on the HFAC Option Setup screen allows external DSX-1 or DS1 alarms to be enabled or disabled. This option can only be changed in the HFAC menu (no dip switch option) and the factory default is disabled (see Table 5).

HFAC Fuse Alarm

An alarm may be generated as a result of an HFAC fuse failure. For alarm processing to work, two sets of switches (S1 and S3) must be programmed. See Table 1 and 4. Both switches must be set properly for the HFAC fuse alarm to operate correctly.

or normally closed connections for alarm conditions. Connection is made to the Common (C) pin and to the Normally Open (NO) or Normally Closed (NC) pin. Visible and audible alarm contact connections are provided for critical, major, and minor alarms. An audible alarm cutoff function can be initiated by pressing the ACO push-button on the HFAC, or by providing closure between the Remote ACO pins on the JP1 connector. The backplane is labeled with appropriate markings for the alarm and alarm cutoff connections.

System Communications

If the HFAC is to be used as part of a larger system under the control of an ADTRAN E220 HCOT-CTL system controller, then shelf-to-shelf connections are required. Two RJ45S jacks, JP6 and JP7, located on the shelf backplane, provide shelf-to-shelf communications. A 4- or 8-wire cable with RJ45S type jacks should be used to supply these interconnections. The sequence of connections should be from the RS422 OUT port of the shelf containing the E220 HCOT-CTL system controller to the RS422 IN port of the next shelf. Follow this procedure to

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