Panametrics Sentinel, User Manual, Page: 28 / 166

Chapter 1. Installation
18 Sentinel™ User’s Manual
1.8.3 Wiring the Serial Port
The flow transmitter is equipped with a built-in serial communications port. The standard port is an RS485 interface,
but an optional RS232 interface is available upon request. For more information on serial communications refer to the
Panametrics EIA-RS Serial Communications manual (916-054).
1.8.3.1 Wiring the RS485 Interface
Upon request, the standard RS485 port on the meter may be configured as a three-wire RS232 interface. However,
the meter must be configured at the factory for RS232 operation.
Note: Use the optional RS485-to-RS232 converter to connect the flow transmitter with RS485 serial port to a
computer with an RS232 serial interface port.
To wire the RS485 serial port, refer to Figure 20 on page xxxviii and either Figure 22 on page xl (AC) or Figure 23 on
page xli (DC) and complete the following steps:
1. Disconnect the main power to the meter and remove the rear cover of enclosure #1.
2. Install the required cable clamp in the chosen conduit hole on the side of the electronics enclosure.
3. Feed one end of the cable through the conduit hole, wire it to terminal block J1 and secure the cable clamp.
Connect the other end of the cable to the converter, as shown in Figure 14 below.
Figure 14: Typical RS485 Connections
4. If the wiring of the unit has been completed, reinstall the rear cover on enclosure #1 and tighten the set screw.
WARNING!
To meet CE Mark requirements, all cables must be installed as described in Appendix A,
CE Mark Compliance .
2
C
–
+
SHLD 3
RX (RS485–) 4
TX (RS485+) 5
J1 / TB6
Converter
1