Endress+Hauser MODBUS RS485 - Page 48

Wiring Proline Promag 53 MODBUS RS485
48 Endress+Hauser
a0002591
Fig. 31: Connecting the transmitter, Cable cross-section: max. 2.5 mm
2
A View A (field housing)
B View B (stainless steel field housing)
C View C (wall-mount housing)
a Cover of the connection compartment
b Cable for power supply: 85 to 260 V AC, 20 to 55 V AC,16 to 62 V DC
Terminal No. 1: L1 for AC, L+ for DC
Terminal No. 2: N for AC, L- for DC
c Ground terminal for protective conductor
d Fieldbus cable
Terminal No. 26: B (RxD/TxD-P)
Terminal No. 27: A (RxD/TxD-N)
e Ground terminal for signal cable shield/fieldbus cable shield
Observe the following:
– the shielding and grounding of the fieldbus cable → ä 41
– that the stripped and twisted lengths of cable shield to the ground terminal are as short as possible
f Service adapter for connecting service interface FXA 193 (Fieldcheck, FieldCare)
g Signal cable: see Terminal assignment → ä 47
a
A
C
25
23
21
2
1
24
22
20
L1 (L+)
N(L-)
–
–
–
+
+
+
27
26
d
c
e
b
g
A (RxD/TxD-N)
B (RxD/TxD-P)
12
c
f
bd
222320 21 24
25
26
27
g
+–+– +
–
L1
N
(L+)
(L–)
e
f
a
d
b
g
d
g
b
A (RxD/TxD-N)
B (RxD/TxD-P)