Bell 202T
and ITU-V.23 compatible operation for 1200 bps over Telco lines
- AUTO RTS - Transmit Carrier can be triggered off data - view PDF for more info
replacement for the UDS202T and the MOT202T Selectable EIA RS-232/V.24 and RS-485 DTE support
Industrial Grade Bell 202T and or V.23 Modem The IG-202T and IG-V23 modems are designed and manufactured for rugged industrial communication networks. Both modems deliver cost-effective and reliable 1200 bps asynchronous solutions for point-to-point and multipoint connectivity. The IG202T/V23 modems are ideal for industrial communication applications including SCADA systems, RTUs, traffic monitor and control, and industrial automation networks. The IG202T/V23 supports RTUs with a user-selectable EIA RS-232 or RS-485 serial port at speeds up to 1200 bps. The IG202T/V23 modem is designed to operate over 4-wire full-duplex or 2-wire half-duplex over unconditioned leased lines or private metallic circuits. For optimum performance, the modem employs FSK modulations to be compatible with Bell 202T and ITU-V23 standards, which can communicate over a variety of transmission lines. The IG202T/V23 modem can operate over a wide range of AC or DC power supply voltages and temperatures. With proven reliability and ease of installation, the IG202T/V23 is ideal for point-to-point and point-to-multipoint polling networks, where reliability and low-network latency are critical for system performance. The Auto RTS feature of the modem is to support the communication protocols between a DTE (data terminal equipment, i.e. RTU) and a DCE (data communication equipment, i.e. modems) when the Request-To-Send (RTS) control signal is absent from RTU when operating in a multi-point polling environment. AUTO RTS - Transmit Carrier can be triggered off data - view PDF for more info
external power module
Spec sheet (please note power should read 90 to264VAC and 115 to 400VDC)
Chassis ground and signal ground of the modem are not connected. Chassis ground is only connected through the shell case of the DB-9F connector to the DTE. This ground is used only for surge voltage returns. The AC neutral is not connected to the modem’s chassis ground.
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