HBM SB01A Notice De Montage page 15

SB01A
a voltage applied, coming from the hazardous area, which corresponds to
approx. half the bridge excitation voltage.
Maximum external capacity C
The maximum capacity value which may be connected to the terminals of the
intrinsically safe circuit of the barrier. This value results from the sum of line
capacity and input capacity of the field unit (load cell).
Maximum inductivity L
The maximum inductivity value which may be connected to the terminals of
the intrinsically safe circuit of the barrier. This value results from the sum of
line inductivity and input inductivity of the field unit (load cell).
The max. permissible capacity and inductivity results from the following
tables:
Load cells tested to PTB 01 Atex 2208, gas group IIC
(HBM types C16..., C2..., U2..., PW...):
Gas group
IIC
IIB
IIA
Load cells tested to PTB 01 Atex 2209, gas group IIC
(HBM types HLC..., RSC..., PWS..., Z6..., PW15...):
Gas group
IIC
IIB
IIA
Load cells tested to PTB 01 Atex 2211, gas group IIC
(HBM types RTN...):
Gas
IIC
IIB
IIA
1)
Max. permissible cable length between SB01A and junction box with HBM
cable type KAB7.5/00‐2/2/2 (blue)
A1020-4.0 en/de/fr
max
that may be connected
max
Capacity (μF) Inductivity (μH)
0.92
5.78
20.98
Capacity (μF) Inductivity (μH)
0.92
5.78
20.98
Capacity (μF) Inductivity (μH)
0.85
5.71
20.91
that may be connected
L/R ratio (μH/Ω)
137
622
1269
L/R ratio (μH/Ω)
149
634
1281
L/R ratio (μH/Ω)
61
546
1193
Cable length
28
300 m
116
233
Cable length
28
300 m
116
23
Cable length
25
100 m
113
230
15
1)
1)
1)
HBM