OPTIONS
Intrinsic Safety Certification
û40 to +85░C Operating Temperature
NEMA-4 Splash-Proof Lens Cover

DESCRIPTION
Model 558B is a 1/8 DIN-sized two-wire current-loop indicator that is powered directly by 1-5 mA, 4-20 mA or 10-50 mA process signals, with no need for external power connections. This reduces field wiring costs and provides immunity from most electrical noise encountered in process-control environments. The two-wire electrical hookup is easy via a plug-in screw-clamp connector, which is standard.

READOUT OF PROCESS VARIABLES
The 558B provides extensive zero and span adjustment capability for direct readout in percent or in engineering units for process variables such as pressure, flow, temperature, or level. A 0.50 in (12.7 mm) high LCD display provides 3 1/2 active digits for readout to ▒1,999, two jumper-selectable dummy right-hand zeros for display to ▒19,990 or ▒199,900, and five jumper-selectable decimal points. With the dummy zeros, the 558B can thus be used to display the weight of heavy trucks in pounds or the volume of large tanks in gallons.

EASY TO CONFIGURE AND CALIBRATE
Both span and zero are fine-tuned with precision 15-turn potentiometers accessible behind the lens. Coarse zero and span steps as well as the dummy right-hand zero are selected by opening the case and changing push-on jumpers.

MULTIPLE AC POWER OPTIONS
The 205-E incorporates a power supply, which is available for 24, 100, 115 or 230 Vac power. All power options provide EMI filtering, so that power line noise does not affect the reading.

INTRINSIC SAFETY CERTIFICATION
For use in hazardous environments, the 558B is available with BASEEFA intrinsic safety certification to level EEx ia IIC T4 in accordance with European CENELEC standards EN 50 014 (1977) + A1 to 4 and EN 50 020 (1977) + A1. The BASEEFA certification number is EX 86B2378. EEx ia intrinsic safety certification allows the 558B to be used in Zone 0 (worst case) hazardous environments with no need for an explosion-proof housing, provided that an intrinsic safety barrier is used to limit the voltage and current that may be introduced in the hazardous environment.

BUILT FOR INDUSTRIAL ENVIRONMENTS
Model 558B is housed in NEWPORT's DIN 4896-100 case, which is splash resistant and requires a depth of less than 3.9" (100 mm) behind the panel. A splash-proof lens cover which meets NEMA-4 requirements is optional. Electrical connections are via a three-pole male header connector on the circuit board and a mating plug-in socket connector with screw clamps, which accommodate wire sizes of 0.5-2.5 mm2 (26-16 AWG). These supplied connectors provide easy and reliable electrical connections and meet UL and IEC-348 safety requirements.

SPECIFICATIONS

SIGNAL INPUT
Signal: 1-5 mA, 4-20 mA or 10-50 mA (jumper-selectable)
Linear Range: 0.3 to 50 mA
Protection: Up to 200 mA forward, 1000 mA reverse
Forward voltage drop, max: 2.5 V
Input Resistance: 50 ohm at 1-5 mA, 12.5 ohm at 4-20 mA, 5 ohm at 10-50 mA
Zero Adjust: û2,000 to +2,000 counts in 4 jumper- selectable ranges plus fine adjustment 00
Span Adjust: 100 to 2,000 counts with fine adjustment
NMR: 46 dB, 50/60 Hz
CMR: (meter to case) 120 dB, DC to 60 Hz
CMV: (meter to case) 300 Vac

ACCURACY AT 25░C
Maximum Error: ▒0.1% of reading ▒1 count
Zero Tempco: ▒0.1 count/░C typical, ▒0.3 count/░C max
Span Tempco: ▒0.005% of span/░C typical, ▒0.015% of span/░C max

ANALOG-TO-DIGITAL CONVERSION
Technique: Dual-slope, average-value
Polarity: Automatic
Integration Period: 100 msec
Read Rate: 2.5/sec

DISPLAY
Type: 7-segment, LED
Height: 0.50" (12.7 mm)
Symbols: û1.8.8.8.0.0 (3 1/2 active digits plus two jumper-selectable dummy right-hand zeros)
Decimal Points: Five positions, jumper-selectable
Overrange Indication: Three least-significant active digits blank

ENVIRONMENTAL
Operating Temperature, Standard: 0 to 55░C (32 to 122░F)
Operating Temperature, Optional: û40 to +85░C (û40 to +185░F)
Relative Humidity: 95% at 40░C (non-condensing)

MECHANICAL
Case: NEWPORT DIN 4896-100
Panel Cutout: 1.77 x 3.62 in (45 x 92 mm)
Bezel Dimensions: 1.89" x 3.79" x 0.31" (48 x 96 x 8 mm)
Depth Behind Bezel: 3.94" (100 mm)
Weight: 4.5 oz (128 g)
Case Material: 94V-0 UL-rated polycarbonate
Circuit Board Connector: Three-pole male header
Cable Connector (Standard): Mating plug-in socket with screw-clamps for wire sizes 0.5 - 2.5 mm2 (26-16 AWG)
Connector Safety Ratings: UL and IEC-348