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Black Box ME840A-M, RS-485, MD3317, ME840A-S, MD3318 manual Installation

Models: ME840A-M ME840A-S MD3318 MD3317 RS-485

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SHORT HAUL MODEM (SHM-FSK)

3. Installation

The SHM-FSK units are shipped ready for either full-duplex or half-duplex multi-drop operation. The jumpers have been factory-set in full-duplex mode.

The Master and Remote units are both factory-configured as DCEs (Data Communications Equipment) with the jumpers on headers P1 and P2 in the B-C position. Data into the DB25 is on pin 2 and data out is on pin 3. (Also see Chapter 5, Jumper Settings.)

Before installing the SHM-FSK units, make sure that the digital devices to be connected to the SHM-FSK units are capable of communicating with each other if connected with a conventional three-wire RS-232 data cable. Once this has been established, the devices can be connected to the SHM-FSK units and RS-232 data communications will take place transparently.

NOTE

Make sure that the wire pair to be used for data communications between SHM-FSK units is connected only to those units; has no branches; has no attached inductance, capacitance, or resistance; and has no loading coils, filters or any other load; and that all connections are clean and solid. Since the data line is transformer-isolated from the rest of the circuit, neither leg of the data-carrying twisted pair should be grounded.

The installation procedure is as follows:

1.Remove the unit’s cover by taking out the four screws on top of the modem.

2.Set the Remote units for either full- or half-duplex operation by positioning the jumper on header P4, located behind the DB25 connector. For full-duplex operation, the jumper should be in the B-C position; for half-duplex, multi-drop operation using RTS line carrier control, the jumper should be in the A-B position.

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Black Box ME840A-M, RS-485, MD3317, ME840A-S, MD3318 manual Installation
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ME840A-M, ME840A-S, MD3318, MD3317, RS-485 specifications

The Black Box IC113C and IC175C are part of a series of versatile RS-485 interface converters designed to facilitate reliable data transmission over long distances. RS-485 is a standard defining the electrical characteristics of drivers and receivers for use in serial communications systems, and these specific Black Box converters exemplify the technology's adaptability and robustness.

The IC113C is an RS-485 to RS-232 converter, providing a seamless transition between these two common serial communication protocols. With a compact design, it boasts an operating temperature range of -40 to 85 degrees Celsius, making it suitable for harsh environmental conditions. Its key feature includes the ability to extend the communication distance up to 4,000 feet, which is ideal for industrial applications where devices may be far apart. Additionally, the IC113C includes built-in surge protection, ensuring that the device can withstand electrical noise and spikes, ultimately increasing the system's reliability.

On the other hand, the Black Box IC175C serves as an RS-485 to USB converter, bridging older serial devices with modern USB interfaces. This converter is critical for users wanting to connect legacy equipment to contemporary computing systems. Featuring a plug-and-play design, the IC175C is easy to install with no external power supply required, as it is powered directly through the USB connection. It also supports data rates up to 115.2 Kbps, ensuring fast and efficient data transfer.

Both models employ differential signaling, which enhances noise immunity and allows for greater transmission distances compared to single-ended communication standards. Furthermore, the converters support multiple nodes on the same bus, accommodating a network of devices without requiring complex wiring schemes.

In summary, the Black Box IC113C and IC175C offer essential features that cater to diverse industrial and commercial applications. With their robust construction, extensive operating ranges, and compatibility with various communication protocols, these converters enhance system interoperability and provide durable solutions for long-distance data communication needs. Whether connecting legacy systems or extending communication capabilities, these devices exemplify reliability and efficiency in modern data transmission technologies.