Emerson Process Management ControlWave XFC - Manual (Page 27)

CI-ControlWave XFC Introduction / 1-13
High Speed Counter inputs are sourced from V+ with a source current of 200uA and a
maximum input frequency of 10kHz.
1.3.5.1.4 Optional RTD Input Probe (also see Section 2.3.6)
Terminal Plate, Term. Block connector J3
provides connection to a 100-ohm platinum bulb
(using the DIN 43760 curve). The common three-wire configuration is accommodated. In
this configuration, the return lead connects to the RTD- terminal while the two junction
leads (Sense and Excitation) connect to the RTD+ terminals.
1.3.5.2 Terminal Plate Input Power Connections
A 2-position Terminal Block is provided on the Terminal Plate and accommodates input
power as follows:
• TB3 - External User supplied power (Battery or Regulated Power Supply) (6 to
+30Vdc).
1.3.5.3 Terminal Plate Communication Port Connections
Connections to two RS-232 and one RS-485 communication ports are provided via connector
J2 (see Section 2.3.2.2 and Section 2.3.2.3).
1.3.6 Multivariable or Gage Pressure Transducer
The Multivariable Transducer (MVT) pressure assembly is connected to the process
manifold either directly or by tubing while the Gage Pressure Transducer (GPT) MUST
ONLY be connected via tubing. In the body of the transducer, metal diaphragms are
exposed to the gas. Solid-state strain gauge sensors in the neck of the transducer measure
the pressure applied to the diaphragms and produce proportional electrical signals.
The neck of the MVT/GPT Transducer extends into the bottom of the enclosure, with the
body of the transducer outside the enclosure. The MVT/GPT cable connector is factory
mated with I/O Board assembly connector P1.
1.3.7 RTD Probe
A 100-ohm platinum bulb (using the DIN 43760 curve) is optionally available. BBI supplied
RTDs are provided with three wires; the return lead connects to the RTD- terminal while
the two junction leads (Sense and Excitation) connect to the RTD+ terminals. RTDs
provided with a bendable conduit and a plastic bushing can only be used in Division 2
installations. Division I installations require the use of an RTD Connection Head used in
conjunction with conduit.
1.4 FIELD WIRING
ControlWave XFC explosion proof gas flow computers support connection to external field
devices through its field wiring terminals on the Function Module’s Terminal Plate.
Connections to the following types of external devices may be made:
• RTD
• Digital Outputs (DOs) • Battery/Power Supply
• Analog Inputs (AIs) • Pulse Inputs (HSCs) • Communications (RS-232 & RS-485)
• Digital Inputs (DIs) • Analog Output (AO) • Relays