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Device manual 6490B / 6490B-y / 6590B
W. Bälz & Sohn GmbH & Co. Koepffstraße 5 D-74076 Heilbronn Telefon (07131) 1500-0 Telefax (07131) 1500-21
7. Technical data
Line voltage 230 V AC
115 V AC
24 V AC
Power consumption approx. 7 VA
Weight approx. 1 kg
Permissible ambient temperature at
- operation 0°C to 50ºC
- transport and storage -25ºC to + 65ºC
Degree of protection Front IP 65 according to DIN 40050
Design For control panel installation 96 x 96 x 135 mm at 6490B, 6490B-y and 48 x 96 x 140 mm
at 6590B (W x H x D)
Installation position arbitrary
DI-feed voltage 24 V DC, Imax. = 20 mA
Analog inputs Pt100, 2.4 = 0°C to 300°C or 2.2 = 0°C to 400°C
Connection in three-wire system
Measuring accuracy 0.1% of the measuring range
Digital inputs high active, low = n.c. / 0 V DC
high = 15 V to 24 V DC
Displays Two 4-digit 7 segment displays, LED red,
character height (6490B, 6490B-y) = 13mm, character height (6590B) = 10mm
Alarm Alarm types A, B, C (operation on the base of the idle current principle)
Relay Switching capacity: 250 V AC / 3 A
Spark quenching element
Serial interface RS 485, modbus protocol in RTU-mode
1200 to 19200 baud
1 start bit, 8 data bits, 1 stop bit, no parity bit
Data protection Semiconductor memory
8. Ordering number baelz 6490B / 6490B-y / baelz 6590B
Examples : 6490B / 0 – 2.4 – 230 – 00.0
6490B-y / 1 – 2.2 – 115 – 00.0
6590B / 4 - 2.4 - 24 - 00.0
baelz µCelsitron
/ – – –
Type (see type-table)
6490B / 6490B-y / 6590B
Version (see type-table)
../0 ../1 ../3 ../4
../4-i (only at 6590B)
Pt100-measuring range
0°C...300°C 2.4
0°C...400°C 2.2
Mains voltage
230 V AC 115 V AC 24 V AC
special model
none 00.0
prospectively special models SX.X
}
-15% / +10%, 50/60 Hz
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