ST-60A Analog to Modbus® RS-485 Serial Interface Converter

ST-60A Analog to Modbus® RS-485 Serial Interface Converter
RC Systems has engineered and manufactured industrial electronic products for the instrumentation
industry since 1979. As critical alarm monitoring experts, we specialize in interfacing various sensors and
analyzer devices to our alarm and display products. Our products are known for their reliability, performance,
and ease of use for applications where maintenance and safety are crucial. Some of these applications include
fixed and temporary ambient gas detection as well as numerous other multi signal monitoring applications.
In addition, we provide various solutions for hard wire or wireless systems. Our wireless monitoring ability/
strategy continues to provide recognized solutions for countless customers worldwide.
ST-60A Analog to
Modbus®
RS-485 Serial Interface
Converter
The RC Systems ST-60A is an analog to RS-485 Modbus®
protocol converter. It accepts voltage and current inputs and
then scales the signal into the appropriate range. Six engineering
units and sixteen channel identification characters may also be
transmitted. In addition, HIGH - WARN and FAULT discrete alarm
values are available. ST-60A’s are easily configured using a PC
or a special hand held battery powered programmer. A total of
128 ST-60A’s may be connected to the same twisted pair cable.
Shown Above: ST-60A
FEATURES
—Non-volatile RAM retains all configuration data indefinitely.
—Accepts analog voltage or current inputs and transmits RS-485 data to a Modbus® Master device.
—More information available with Modbus® over traditional —The protocol is Modbus® RTU; supporting function codes 2 through 6.
—No determination must be made concerning alarms, range or —As many as 128 ST-60A converters may be multi-dropped onto the same twisted pair data highway.
—Transmitted data includes the analog value scaled for range and engineering units, discrete HIGH -WARN and FAULT alarm values, and a 16 character identification descriptor.
—Available in general purpose high density DIN rail mount housing or an explosion-proof instrument enclosure.
—Alarm controllers and displays are also available.
—Packaged in high density DIN rail mount enclosures.
4-20mA loops.
location when accepting data.
—Wiring may be daisy chained unlike traditional systems requiring 2 wires per signal.
—Requires 12 or 24 VDC power.
SPECIFICATIONS
ST-60A INPUTS BY MODEL
ANALOG INPUTS
4-20mA into 100 ohms input impedance. Any input voltage between 0-100mV
and 0-5 volts may be selected by adjusting reference voltage with 25 turn
potentiometer
60-61
ST-60A DN DIN rail mounted converter
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Instrument enclosure suitable for Class 1, Groups B,C,D; Class 2, Groups E,F,G. Also meets NEMA 4 with included ‘O’ ring
ANALOG TO DIGITAL CONVERTER
10 bit successive approximation
ST-60A OPTIONS
SERIAL PORT
RS-485 half or full duplex. Protocol is Modbus® RTU
ACCURACY
±.1% of full scale ± 1 count
AMBIENT TEMPERATURE RANGE
-20-60 degrees C
60-68
Universal hand held programmer. Allows ST- 60A multidrop networks be configured using a battery powered portable device
60-69
PC programming kit. Includes software, cable and RS-232 to RS-485 Converter to allow ST-60A multidrop networks be configured from any PC
TEMPERATURE DRIFT
Less than .1% per degree C over ambient temperature range
POWER SUPPLY
19 - 30VDC (24VDC nominal) at less than 50mA
10 - 18VDC (12VDC nominal) available by special order
HOUSING
DIN rail fire retardant plastic or NEMA 7 explosion-proof
TYPICAL WIRING INSTALLATIONS
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NEMA 7 EXPLOSION PROOF HOUSING OPTION
GENERAL PURPOSE DIN RAIL HOUSING OPTION
ALL DIMENSIONS IN INCHES
Representative: C A Briggs
8621 Highway 6, Hitchcock, TX 77563
Tel: (409) 986-9800 Fax: (409) 986-9880
www.rcsystemsco.com
Company - 632 Davisville Road - Willow Grove, PA 19090
Phone: 215-784-9250 - Fax: 215-784-0611 - E-Mail: Sales@cabriggs.com - www.cabriggs.com
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