RS-232 RS 422 RS-485 Fiber Optic Modem

The TC1540 fiber optic modem for RS-232, RS-422 or RS-485 (2-wire or 4-wire) interfaces fiber modem - user could have a 2-wire RS-485 interface on one end and an RS-232, RS-422 or 4-wire RS-485 interface on the other - 2-wire RS-485 versions can be converted to 4-wire RS-485 by simply changing a DIP switch.

Async Data Rates Up to 500 Kbps*
Distances up to 20km
Multimode or Single Mode (850/1300/1550nm)
Switch-Selectable 2-wire or
4-wire RS-485
Mix & Match RS-232/422/485
Built-In Test Signal Generator
8 LEDs & 8 DIP Switches for Diagnostics
Low Power Consumption
Local Dry Contact Alarm
High Temperature (-20°C to 70°C) Version Optional

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Applications

The TC1540 typically interconnects CPUs or Host Controllers with remote terminal units (RTUs). It is frequently used in SCADA, Traffic Control, Manufacturing Process Control and Security applications

The TC1540 is a highly versatile 2-wire RS-485 fiber optic modem that can mix or match RS-232, RS-422 or RS-485 (2-wire or 4-wire) interfaces, as required. For example, a user could have a 2-wire RS-485 interface on one end and an RS-232, RS-422 or 4-wire RS-485 interface on the other. 2-wire RS-485 versions can be converted to 4-wire RS-485 by simply changing a DIP switch.

The TC1540 supports asynchronous data rates up to 500 Kbps*, depending on the electrical interface, and is compatible with all popular types and sizes of multimode (850/1300nm) or single mode (1300/1550nm) fiber optic cable. Distances up to 20km are possible.

Diagnostics include a built-in Test Signal Generator that verifies both device and fiber optic link operation. This feature benefits users by helping technicians verify that both local and remote devices and the fiber optic link are operating normally. Local and Remote Loopback Tests are available to verify electrical and fiber connections.

Eight DIP switches and seven LED indicators are provided to help installation and troubleshooting. An extreme temperature version (-20°C to 70°C), Model TC1540T, is also available.

Fiber optic connectors are ST or FC. Electrical connectors are terminal blocks. Power is 12VDC at 250mA; optional 24VDC or 115/230VAC with an external power cube.

Data Rates
Async	up to 500 Kbps
Optical
Transmitter	LED, ELED
Receiver	PIN Diode
Wavelength	850nm, 1300nm Multimode 1300nm, 1550nm Single Mode
Fiber Optic Connectors	ST or FC
Loss Budget* (850nm, 1300nm, 1550nm)	Multimode (62.5/125µm): 15dB Single Mode (9/125µm): 15dB
Electrical
Interface	(DCE) RS-232,RS-422 or RS-485 (2 or 4-wire)
Connector	Terminal Blocks
System
Bit Error Rate	1 in 10⁹ or better
* Contact factory for higher requirements
Visual Indicators
LEDs TD, RD, O-Sync, COLL, DRVMD, RS-485, Power
Alarm
Dry Contact Normal OPEN
Power
Standard	12VDC @ 250mA
Optional	24DC, 115/230VAC (with external power cube)
Temperature
Operating	-10° to 50°C
Hi-Temp (optional)	-20° to 70°C
Storage	-40° to 90°C
Humidity	95% non-condensing
Physical
Height	(2.79 cm) 1.1"
Width	(12.70 cm) 5.0"
Depth	(6.35 cm) 2.5"
Weight	(180 gm) 5.1 oz.