Woodward 2301E-ST, Инструкция по установке и эксплуатации

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Manual 26694 2301E-ST
Woodward 25
Level Switch Options
1. TURBINE SPEED
2. TURBINE SPEED REFERENCE
3. VALVE LIMITER REFERENCE
4. ACTUATOR
DEMAND
5. GENERATOR OUTPUT
6. MONITOR SIGNAL
Analog Output (Terminals 16-18)
Connect readout wiring to terminals 16(+), 17(–), and 18(shield) to use the control’s 4–20 mA Analog
Output. This Analog output is software configurable to function as one of the following readout options:

TURBINE SPEED

TURBINE SPEED REFERENCE

VALVE LIMITER SETPOINT

ACTUATOR DEMAND

GENERATOR OUTPUT

SIGNAL MONITOR
Verify that the output’s shielded wire has continuity its entire distance to the output device and is insulated
from all other conducting surfaces. This current driver based output is designed to drive into impedances
of up to 250
Ω . This output is not isolated from the other control inputs and outputs, thus an isolation
device may be required with this output if the device being interfaced to is not isolated.
This analog output’s 4–20 mA current drive signal is directly proportional to the programmed function
signal that it is configured to represent. Refer to Chapter 3 for output configuration instructions. Its
clarifications are the same as Level Switches.
Communication Port
The control’s two serial communication ports are used to configure and service the unit. These ports are
on a common return and are isolated ports.
The RS-232 serial communication service port communicates using either the 2301E-ST Toolkit Service
Tool or the Control Assistant software. Refer to Figure 2-2 for plant wiring information.
The RS-422 serial communication port communicates using a Modbus RTU protocol, functioning as a
Modbus Slave device, via a RS-422 driver. The
2301E-ST can be fully operated and many values monitored via Modbus communications.
Alternatively Modbus communications can be used to interface with a PLC or plant DCS. Refer to Figure
2-2 for plant wiring information.
The communication port must be connected with an approved
jacketed serial communication cable. The connector must be
secured to the 2301E-ST to prevent contact with other circuits.
Released