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RC SYSTEMS
PRODUCTS |
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ST-90/QUAD CONTROLLER WITH SERIAL INTERFACE
- Accepts inputs from up to four 4-20mA sensors transmitters. Generates 24 VDC @ 8 watts external device power
- 3 independent alarm levels per channel. Relay Acknowledge feature allows silencing of external audible devices during existing alarm conditions
- Graphic LCD readout displays monitored data as bar graphs and engineering units. Alarm LED’s flash when new and become steady after acknowledged
- Two standard SPDT common alarm relays are configurable for HORN, HIGH, WARN or FAULT alarm conditions. Optional discrete channel alarm relays are also available
- Options such as Modbus slave RS-485 serial port, 10-BaseT ethernet, data logging, 4-20mA outputs, discrete alarm relays and others are also supported
- Modbus slave RS-485 serial port interfaces to Modbus masters such as PC’s, PLC’s & DCS’s
- Cal Mode offers pushbutton zero / span calibration for direct sensor interface applications. Authorizat-ion Mode allows locking of critical configuration variables
- Magnetic keypad available for nonintrusive operation in potentially hazardous locations
- NEMA 4X (Div. 2 certified) and Explosion-Proof wall mount packaging options available
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The R. C. Systems Co. Inc. ST-90/Quad Channel Display / Alarm Controller is designed to provide simultaneous display and alarm functions for four monitored variables. A graphic LCD displays monitored data as bar graphs, 30 minute trends and engineering units. Three adjustable alarm levels are provided per channel. Programmable relay outputs allow control of beacons, horns and other alarm events. 24VDC power is available for powering transmitters or other devices. 4-20mA inputs are standard equipped and ideal for interfacing to sensor transmitters that may be long distances from the ST-90.
The ST-90/Quad is easy to configure and user friendly. Measurement ranges in engineering units, adjustable alarm set-points, optional serial interfaces, and many other features offer flexibility to meet most demanding applications. One popular application is the ST-90 functioning as a critical alarm controller and readout monitoring variables such as toxic / combustible gases, vibration, tank levels, and other process values.
An optional RS-485 Modbus slave port allows up to 128
ST-90's to be multidropped onto a single data highway for interrogation by another Modbus master. 10-BaseT ethernet is also available utilizing the popular Modbus TCP/IP protocol. Other ST-90/Quad options include six programmable 5 amp SPDT discrete alarm relays, 4-20mA outputs, light stacks and audible annunciators.
Nonvolatile memory retains all configuration data indefinitely.
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