Mettler Toledo ACM500 Guia De Instalacion página 12

1.8. Intrinsically Safe Serial Interfaces
A fiber optic interface or an intrinsically safe serial interface may be used to connect an IND560x
terminal to the ACM500. If a dual-channel fiber optic converter (from a previous 8141, 8525,
Puma, or ID3sTx installation) is to be connected to an IND560x, the fiber optic interface must be
used.
1.8.1. Fiber Optic Interface
The fiber optic interface provides one or two channels of communication designed to use a hard
clad silica or a plastic optical fiber cable. High speed transmitters and receivers are used to
increase the throughput of data. When combined with the ACM500 communication module and its
options, this permits remote (safe area) operation of COM2 and COM3 serial ports, Ethernet and
PLC interfaces, at distances up to 300 meters (1000 ft.). When used with the standard dual-
channel fiber optic converter, this interface provides one or two additional bi-directional serial ports
(COM2 and COM3) at the same distance. If the plastic optical fiber cable is used, the distance is
reduced to 40 meters (130 ft.).
1.8.2. Intrinsically Safe Current Loop Interface
The intrinsically safe current loop interface provides one or two channels of communication
designed to use standard multi-strand copper wire. Low power, high speed circuitry is used to
extend the distance of each circuit up to 300 meters (1000 ft.) when using two twisted pair 0.5
mm
this permits remote (safe area) operation of COM2 and COM3 serial ports, Ethernet and PLC
interfaces.
1.9. Options
The following options are available for use in the ACM500.
1.9.1. Ethernet/COM2/COM3 Ports
The Ethernet/COM2/COM3 port option provides two additional serial ports and a TCP/IP Ethernet
port. The Ethernet TCP/IP port can be used to transmit a demand template or continuous data to
other devices. It can also be used for remote configuration and updating the firmware using the
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transfer of tare and target tables and complete setup files is also supported.
The COM2 port provides RS-232 communication at rates from 300 to 115.2k baud and the COM3
port supports the same baud rates and provides an RS-232, RS-422, or RS-485 connection.
When using COM2 or COM3 serial ports in the ACM500, it is recommended to use a network
transmission baud rate of at least 9,600 Baud. Using COM2 or COM3 serial ports with network
transmission baud rates of 4,800 Baud or less may result in continuous data lagging behind real
time conditions, or a delayed response to on-demand data requests (e.g., SICS requests).
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(20 GA) cable. When combined with the ACM500 communication module and its options,
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program, and for direct access to data via a shared data server. FTP
METTLER TOLEDO ACM500 Installation Manual
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