EMG 1500 Operating Manual
Installation
7
3.2.1 Power supply
The instrument requires a 230 V AC, 50/60 Hz power supply. Der
This is connected at the “230V
∼∼∼∼
” terminals as shown in the wiring
diagram Figure 1, Seite 6.
Important:
The instrument power supply must be provided with 2 A
external overcurrent protection.
3.2.2 Connection to the Ethernet
The EMG 1500-PN is connected to a hub or switch via the shielded
RJ45 jack (10BaseT) at the front of the instrument. The pin
assignment corresponds to that of an MDI port, so that a 1:1 cable
must be used.
3.2.3 Connection to the FRAKO Starkstrombus
®
The terminals “Bus A”, “Bus B” and “Bus
⊥
⊥⊥
⊥
” are provided for
connecting to the FRAKO Starkstrombus
®
as shown in Figure 1, on
page 6.
The two poles of the two-wire bus are connected to terminals “A”
and “B”, attention being paid to the correct polarity, while the
shielding is connected to the “
⊥
⊥⊥
⊥
”
terminal. The “A” terminal is thus
connected with all the other A terminals of the bus, and the same
applies to the B and “
⊥
⊥⊥
⊥
” terminals. (No crossover in the cables!)
Important:
The bus shielding (
⊥
⊥⊥
⊥
) must be earthed only at one point in the
bus system. If this has not already been arranged at another
point, it should be done at the EMG 1500-PN.
The bus must have a single-segment topology, all instruments being
patched in to this segment or connected to it by a drop line up to 2
m in length. Star topologies can be constructed by using a repeater
(component EMB 1101).
The total length of the bus should not exceed 1200 m. A repeater
(component EMB 1101) must be installed in the line if greater
distances are needed.
