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16 Micro Motion
®
Series 3000 MVD Transmitters and Controllers
Digital Communications Setup
You may also order the IC521A-F signal converter with a ticket printer. Contact Micro Motion for the
appropriate ETO (engineered-to-order) number.
Depending on your remote device, you may also need a 9-pin to 25-pin adapter.
Note: The ProLink PC Interface Adaptor (PCIA) cannot be used with the Series 3000 device. Because
the PCIA does not control the ready-to-send (RTS) line, communication between the Series 3000
device and the remote device cannot be initiated.
Other conversion
If you need to convert the RS-485 signal to another signal, you must supply the appropriate signal
converter.
3.2.3 Bell 202 signal converter
RS-232 conversion
If you need to convert the Bell 202 signal to an RS-232 signal, as used by a PC’s serial port, signal
converters are available from Micro Motion (part number PLKUSB202KIT or PLK202KIT). Contact
Micro Motion for information about ordering these converters.
You may also need a Bell 202 cable or a 9-pin to 25-pin adapter.
Other conversion
If you need to convert the Bell 202 signal to another signal, you must supply the appropriate signal
converter or HART interface.
3.3 Setting up RS-485 communications
Follow the steps below to set up RS-485 communications between the Series 3000 device and a
remote device.
1. Locate and identify the RS-485 terminals on the Series 3000 device. Refer to Table 3-2 and
Figure 2-2. Additionally, the Series 3000 device has a label or card that shows input/output
wiring terminal designations. See Figure 2-3.
Note: The terminals labeled Comm 1, Comm 2, and Comm 3 are not for I/O wiring. These terminals
are for Micro Motion internal use only.
Table 3-2 RS-485 wiring terminals
Model RS-485 terminals location/description
RS-485 terminals
AB
Model 3300 or Model 3500 with
screw-type or solder-tail connectors
Input/output wiring terminal block a 32 c 32
Model 3300 or Model 3500 with
I/O cable
I/O terminal block on DIN rail 25 24
Model 3350 or Model 3700 Gray terminal block, non-intrinsically safe wiring
compartment
12 11