Furuno IB-681 manual Modifying the RF Conv board in the communication unit, RS-449 Interface

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			Pin No.	RS-449 Signal	CCITT	Signal Description	DCE-DTE
			Pin No.	RS-449 Signal	Circuit	Signal Description	DCE-DTE
					Circuit

			4/22	SD	103	Send Data	←

			5/23	SCT	114	Send Timing	→

			6/24	RD	104	Receive Data	→

			7/25	RTS	105	Request to Send	←

			8/26	SCR	115	Receive Timing	→

			9/27	CTS	106	Clear to Send	→

			11/29	DSR	107	Data Set Ready	→

			12/30	DTR	108	Data Terminal Ready	←

			13/31	DCD	109	Receiver Ready	→

			15	IC	125	Incoming Call	→

Pin (male) arrangement			19	SG	102	Signal Ground	–
Pin (male) arrangement

Pin nos. 1-3, 10, 14, 16-18, 20-21, 28, 32-37 are not used.

Figure 15 RS-449 Interface

Fabrication of plug case assy.

Aluminum tape

Fold back braided shield onto cable; tape shield as shown.

Cable Clamp

Cable

Figure 16 Fabrication of plug case (same procedure for 25 pin, 37 pin)

5.2.2 Modifying the RF CONV board in the communication unit

1.Turn off the communication unit.

2.Detach the cover.

3.Replace the RF CONV Board as follows if it is version -4 or below.

a)Unfasten the coaxial connector nut.

b)Unplug all connectors from the RF CONV Board.

c)Dismount the RF CONV Board.

d)Mount the new RF CONV Board, plug in connectors to the board, and fasten the coaxial connector nut.

e)For the new RF CONV Board, set R135 according to antenna cable length as shown in the table below. See Figure 19 for the location of R135.

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Contents Page B . N o . O M E 5 6 0 9 Safety Information for the Operator Safety InstructionsElectrical Shock Hazard Safety Information for the InstallerTable of Contents Declaration of conformity to type Appendix Usage TipsIntroduction FeaturesComplete Set Installation Materials CP16-01601Installation Materials CP16-01602 Equipment ListInstallation Materials CP16-01605 Installation Materials CP16-01603Optional Equipment IB-681 System ConfigurationIB-181 IB-281Control Description OverviewFront panel IB-681, rear view Rear panelData rate SettingsSwitch Panel Settings DIP switchesSW2 Terminal interface Terminal Unit Settings OID/DID and IMN SettingsConfirming subscriber number Registering, Deleting Subscriber NumberRegistering subscriber number Deleting subscriber numberCalling OperationAutomatic HSD call Tone Name Frequency Manual callInterval Receiving Automatic call mode and receiving operationSW1 State Remarks SW3 State Remarks V.25bis Command, IndicationReceiving and automatic data rate switching Command Name DescriptionIndication Description Command DescriptionCall Sequence Direct call setup sequenceAddress call setup sequence Address call setup sequenceManual call setup sequence Manual call setup sequenceCall clear sequence from land Automatic call clear sequenceManual call clear sequence Manual call clear sequenceResetting the circuit breaker Maintenance & TroubleshootingMaintenance CleaningCalling Troubleshooting for the UserThen GeneralMounting location InstallationMounting procedure MountingWiring between HSD modem and router WiringRS-449 Interface Modifying the RF Conv board in the communication unitCPU2 Board 16P0133 Antenna cable Position of R135 LengthJ10 RF Conv BoardRF Conv Board CPU2 Board R135Mounting of connector assy Sub 9 pin Rear Panel BoardGround Wiring between HSD modem and communication unitJ11 Communication with other makes of Inmarsat-B terminals Circuit delayPropagation delay Router setting for network connectionNetwork configuration Syuchronous -asynchronous adapter Land Earth Station IOR Etilat IB-681 Page Page Page Index