Tek-Trol Tek-LCD 7804B-AX0 Modbus Scanner Indicator
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Manufacturer warranty Description
Tek-Trol, Tek-LCD 7804B-AX0, Explosion-Proof Modbus Scanner Indicator
Features:
- Modbus® Master, Slave, or Snooper Mode
- Scan up to 16 Modbus Process Variables
- 5-Digit Decimal or Feet & Inches Level Display
- On-Board Three-Wire RS-485 with Modbus
- Independent Scaling, Tag, and Unit for Each PV
- 7 Alphanumeric Character 0.4" (10.2 mm) Lower Display for Process Variables, Custom Units, and Tags
- Explosion-Proof, IP68, NEMA 4X Enclosure
- Pulse Input for Rate, Total, and Grand Total
- 13-Digit Totalizer with Total Overflow Feature
- Password Protection
- Two Isolated Pulse Outputs Standard, Up to 5 kHz
The Tek-LCD 7804B is an explosion-proof, RS485 serial input Modbus® RTU scanner capable of scanning up to 16 Modbus variables and displaying them on an easy-to-read, dual-line, LCD. This Modbus scanner can be programmed as a Modbus RTU master, slave, or snooper. The lower line is the same for both versions and consists of seven alphanumeric characters. The Tek-LCD 7804B carries FM, CSA, ATEX, and IECEx approvals for use in hazardous areas. Two features that make the Tek-LCD 7804B stand out are its wide viewing angle display and SafeTouch® through-glass buttons. These buttons allow the Tek-LCD 7804B to be programmed and operated through the glass, thus eliminating the need to remove the cover in a hazardous area.
Dimensions:
Technical details
- Weight 5.00 lbs (80 oz, 2.27 kg)
- Enclosure Explosion-proof die-cast aluminum with glass window, corrosion-resistant epoxy coating
- Mounting May be mounted directly to the conduit. Two slotted flanges for wall mounting or NPS 1-1/2" to 2-1/2" or DN 40 to 65 mm pipe mounting.
- Input Power 9-30 VDC, 38 mA max. 2.2 W
- Overall Dimensions 5.67″ x 5.24″ x 4.88″ (144 mm x 133 mm x 124 mm) (W x H x D)
- Backlight White LED, 10-sec auto-off when battery-powered. Backlight deactivated below temperature ~ -20°C
- Over Range Upper Display: Decimal display flashes 99999 The level display flashes to 399FT 1115/16 IN Lower Display: Flashes 9999999
- Under Range Upper Display: Decimal display flashes -9999 The level display flashes to 399FT 1115/16 IN Lower Display: Flashes -999999
- Display Assignment Top and Bottom Display: Process Variables (PV); Alternating PV and Units, Tag and PV, or Tag, PV, and Units; Pulse Input Rate, Total, or Grand Total with Alternating Tag.
- Programming Method Four SafeTouch through-glass buttons when the cover is installed. Four internal push buttons when the cover is removed.
- Recalibration Calibrated at the factory to read frequency in Hz. No recalibration is required.
- Display Orientation The display may be mounted at 90° increments up to 270° from default orientation.
- Decimal Display Top:Top Display: Five Digits (0 to 99999), 0.7″ (17.8 mm) high, 7-segment, automatic lead zero blanking. Bottom Display: Seven Characters, 0.4″ (10.2 mm) high, 14-segment, automatic lead zero blanking.
- Feet & Inches Display Top Display: 0.60″ (15.2 mm) high, 0 to 399FT, 1115/16 IN, 7-segment, programmable 1/16 or 1/8 fraction display. Bottom Display: Seven Characters, 0.4″ (10.2 mm) high, 14-segment, 7-digits.
- Alarm Indication Flashing display plus HI/LO (alarm) or SET indicators.
- Scan and Update Rate Ambient > -20°C: Modbus PV scan rate programmable from 2 to 99 seconds per PV. Tag and units programmable for 1 to 5-second alternation. Pulse input variables update 1/second. Rate update is dependent on gate settings. Ambient < -20°C: All Modbus scans, alternating units and tags, and pulse input variables update/10 seconds minimum.
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