Model TC1720   Universal Sync/Async Fiber Optic Modem   Features Data Rates up to 2.5 Mbps Distances Up to 30km*  All Popular Electrical Interfaces Built-In Test Signal Generator Local & Remote Loopback Interchangeable Interface Supports 5 RS-232 Control Signals Multimode & Single Mode Mode (850/1300-1310/1500nm) Built-In Power Redundancy (optional) Recessed Design for Easy Panel Access Local Dry Contact Alarm Relay Rackmount or Stand Alone Description The TC1720 is ideal for applications requiring the RS422 interface with the DB37 Connector and high data rates, it supports asynchronous data rates up to 256Kbps and synchronous rates up to 2.5Mbps.  Distances up to 30km* are possible depending on various factors including electrical interface, optical transmitter, number of fiber optic connectors and fiber type and quality.  Power redundancy is available when the TC1720R is used with the TCRM192 or 196 Rack Assembly and optional in standalone versions.  Diagnostics are extensive and include a built-in Test Signal Generator, local loopback and LEDs for Power, Alarm, Tx, Rx and all applicable control signals.  The Test Signal Generator verifies both device and fiber optic link operation. Available for multimode (850/1300nm) or single mode (1310/1550nm), the TC1720 is compatible with all popular sizes and types of fiber optic cable.  Fiber optic connectors are ST, SC or FC.  Electrical connectors are DB37 female.  Power is 12VDC (standard), 24VDC, -48VDC, 125 VDC or 115/230VAC with an external power cube. The TC1720 is available in two versions: PC Card for installation in a 19' rack assembly , wall mount, or standalone "Pizza" box.  Standalone or rack mount versions can be mixed or matched on either end.  An extreme temperature version (-20° to 70°C), Model TC1700T, is also available. *Contact factory for higher requirements (Laser version). TC1720 Specifications Data Rates RS-422 Sync up to 2.5 Mbps RS-422 Async up to 256 Kbps Optical Transmitter LED/ELED/Laser Diode Receiver PIN Wavelength 850nm/1300nm multimode   1310nm/1550 single mode Fiber Optic connectors ST, SC MM -  ST or SC or FC SM  Loss Budget TC1720R                     15dB multimode 850nm/1310nm @62.5um 15dB single mode 1310nm @9um Electrical (DCE /DTE) RS-422 DB37 female Bit error rate RS-422 1 in l09 or better Visual Indicators System "POWER A," "POWER B," "ALARM," RS-422 "VCC," "Rx," "RxD," "TxD," "RCLK," "TCLK," "CTS," "RTS," "DSR," "DTR," "CD," "LOOP TEST, "INT CLK," "EXT CLK", "SLAVE CLK" Power Redundant Power source 9 to I4VDC @400mA optional: 115 or 230VAC with external power cube optional: 24,-48, 125 VDC   Temperature Operating - TC1720S/R                        TC1720T - 100C to 500C - 200C to 700C Storage -400C to 900C Humidity 95% non-condensing Physical Stand Alone Unit Height (7.0cm) 2.75"   Width (18.4cm)7.25"   Depth (16.5cm) 6.5"   Weight (700gm) 1.5 lb Rack Mount Card Height (15cm) 5.963"   Width (3.cm) 1.25"   Depth (13cm) 6.00"   Weight (I40gm)6oz   Typical Application (Application Questions)