Remote Access brochure.pdf - Westermo - (Version JPG) - Page n° 19 - PDF Catalogue | Technical Documentation

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RS-422/485


Electrical specification	EIA/TIA-485 ITUV.11
	2-wire or 4-wire twisted pair
Data rate	TD-36 485	300 bit/s - 115.2 kbit/s.
	TR-36	300 bit/s - 115.2 kbit/s
	IDW-90	300 bit/s - 115.2 kbit/s
	TD-23	Up to 1200 kbit/s
	TD-29	2400 bit/s - 19.2 kbit/s
Data format	7 or 8 data bits, Odd, even or none parity, 1 or 2 stop bits.
	2 9-12 bit words
Protocol	Transparent
Re-timing	Yes
Turn around time	<10 us (half duplex)
Transmission range	<1200 m, depending on data rate and cable type (EIA RS-485)
Settings	120 £1 termination and failsafe biasing 680 £1
Isolation to	TD-36 485	Power port	3 kVrms 50 Hz 1 min
		PSTN line	2 kVrms 50 Hz 1 min
		Leased Line	2 kVrms 50 Hz 1 min
		I/O	2 kVrms 50 Hz 1 min
	TR-36	Power port	3 kVrms 50 Hz 1 min
		PSTN line	2 kVrms 50 Hz 1 min
		Leased Line	2 kVrms 50 Hz 1 min
	IDW-90	Power port	3 kVrms 50 Hz 1 min
		ISDN line	2 kVrms 50 Hz 1 min
		I/O	2 kVrms 50 Hz 1 min
	TD-23	Power port	3 kVrms 50 Hz 1 min
		Leased Line	2 kVrms 50 Hz 1 min
	TD-29 AC	Power port	3 kVrms 50 Hz 1 min
		RS-232	2 kVrms 50 Hz 1 min
		FSK-line	1.5 kVrms 50 Hz 1 min
	TD-29 DC	Power port	1 kVrms 50 Hz 1 min
		RS-232	2 kVrms 50 Hz 1 min
		FSK-line	1.5 kVrms 50 Hz 1 min
Protection	Installation FaultTolerant (up to ±60V)
Connection	Detachable screw terminal
Connector size	0.2-2.5 mm²(AWG 24-12)
Shielded cable	Not required*
Miscellaneous	Do not connect RS-232 and RS-422/485 simultaneously

* Railway installation close to the rails.

For a cable located within 3 m and connected to this port, the use of shielded cable is recommended, this is to minimise the risk of interference.The cable shield should be properly connected (360°) to an earthing point within 1mof this port.This earthing point should have a low impedance connection to the conductive enclosure of the apparatus cabinet, or similar, where the unit is built-in.This conductive enclosure should be connected to the earthing system of an installation and may be directly connected to the protective earth.

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Remote Access brochure.pdf - Westermo - #19

Isolator, Multiplexer, ADSL router, Extender, Power over Ethernet