Wiring Connections; Interface Board Wiring Connections - Mettler Toledo ACM500 Installationsanleitung

3.5.

Wiring Connections

The following sections describe how to make wiring connections to the ACM500 communication
module. Follow all instructions carefully.
3.5.1.

Interface Board Wiring Connections

Depending on the model ordered, each ACM500 will have either the fiber optic serial interface board
or the intrinsically safe current loop interface board installed. After the ACM500 enclosure is open,
the interface board can be removed and connections made as described in the next sections.
Each interface board provides two circuits for communication to the IND560x. Depending upon the
options used, it may not be necessary to provide connections to both circuits. Refer to Table 3-2 to
determine if both the COM4 and the COM5 circuits must be connected.
3.5.1.1. Fiber Optic Interface Connections
The ACM500 does not include fiber optic cables to connect to the IND560x terminal. Fiber optic
cable is available separately from METTLER TOLEDO with pre-terminated connectors in various
lengths.
Two types of cable are offered for use with the ACM500:
The plastic core fiber optic cable can be used for short cable runs up to 40m (125 ft.). For longer
cable runs, up to 300m (1000 ft.), the hard clad silica (glass) core cable must be used. Various
cable lengths for each type of cable are available. Please refer to your price pages and appropriate
catalogs for available lengths and part numbers.
If necessary, two glass core fiber optic cables can be coupled using a special optic coupler, but the
coupler signal loss is equivalent to 150 m (500 ft.) of cable. When one coupler is used the
useable distance of the glass core cable is reduced to 150 m (500 ft.)
It is possible to cut the plastic core fiber optic cable in the field and install the connectors using the
available termination kit. The glass core fiber optic cable requires special tools to install the
connectors and field termination of this cable is not recommended.
64061976 | 07 | 01/2019
Table 3-2: ACM500 Interface Port Usage
ACM500 Option Used
COM2 Port
COM3 Port
Ethernet
PLC Option
When using fiber optic cable to connect the IND560x to the ACM500 communications
module, care must be taken not to bend the cable sharply or it could be permanently
damaged
• Plastic core
•
Hard clad silica (glass) core
COM4 Required COM5 Required
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METTLER TOLEDO ACM500 Installation Manual 3-7