Technical Specifications
B-37
DP/PA Link and Y Link Bus Couplings
A5E00193841-011
B.4 Technical specifications of the DP/PA coupler Ex [i]
(6ES7 157-0AD81-0XA0)
Dimensions and weight
Dimensions
W H D (mm)
80 125 130
Weight Approx. 515 g
Module-specific data
Transmission rate on
PROFIBUS-DP
45.45 kbps
Transmission rate on
PROFIBUS-PA
31.25 kbps
Bus protocol PROFIBUS-DP
Ignition protection type
as associated
equipment for:
II 3 (1) G EEx nA [ia]
IIc T4
Voltages, currents, potentials
Rated supply voltage 24 VDC
(20.4 V ... 28.8 V)
Polarity reversal
protection
Yes
Power failure
bridging
Min. 5 ms
PA interface
Output voltage 13 VDC ... 14 V
Output current for: Max. 110 mA
Galvanic isolation of the 24 V power supply
To PROFIBUS-DP Yes
To PROFIBUS-PA Yes
Insulation tested at 500 VAC
DP/PA coupler power
input (24 VDC)
Max. 400 mA
Power loss of the
module
Typically 7 W
Status, interrupts, diagnostics
Status display No
Interrupts None
Diagnostic function Yes
PROFIBUS-DP bus
monitoring
Yellow “DP” LED
PROFIBUS-PA bus
monitoring
Yellow “PA” LED
24 V supply
monitoring
Green “ON” LED
Ex [i] characteristic data
U
o
I
o
P
o
U
m
T
a
= 15 V
= 249 mA
= 1.95 W
= 60 VDC/30 VAC
= –25 to +60 °C
Connectable cables (PA)
R’ 15 ... 150 /km
L’ 0.4 ... 1 mH /km
C’ 80 ... 200 nF /km
Length Max. 1000 m; for safety
reasons (explosion
protection)
Data for selecting the PA field devices
Connection to DP/PA
coupler
Field devices with
certification for
PROFIBUS-PA
Max. 31 PA field
devices can be
connected
Power input of all
PA field devices
together max. 110
mA
Approval data of the PA field devices must
correspondto Ex [i] characteristics of the DP/PA
coupler:
U
o
I
o
P
o
U
m
w15 V
w 247 mA
w1.95 W
w 60 VDC/30 VAC
L
i
C
i
U
i
I
i
P
i
< 10 H
< 5 nF
w15 V
w249 mA
w1.95 W
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