Installation
EMG 1500 Operating Manual
8
Terminator resistors must be connected at the beginning and at the
end of a bus segment. A 120 ohm resistor is connected between
terminals “A” and “B”. In bus systems with less than 4 devices
connected a 1 kohm resistor must also be in place between the “A”
and “
⊥
⊥⊥
⊥
” terminals. The resistors must have a 250 mW power rating.
Recommended cable types:
Surge impedance 100 - 120 ; Ø
≥
0,3mm²; twisted together and
shielded;
Types:
Manufacturer
cable-type
order number
cable
Ø
Twinax 105
Lapp
Unitronic® Bus CAN 1x2x0,34
2170263
6,8 mm
Helukabel CAN BUS 1x2x0,34
801572
6,5 mm
Leoni
L-02YSCY 1x2x0.34/2.0-120 VI L45551-P21-C5 6,8 mm
Note:
Always avoid mixing various cable types.
3.2.4 RS-232 connection
The EMG 1500-PN must be configured using the “SYSTEM-SW”
software. To do this the instrument is connected to a PC by a
crossover RS-232 (null-modem) cable. This cable is not included in
the scope of supply.
RxD 2
TxD 3
GND 5
RTS 7
CTS 8
DSR 6
DCD 1
DTR 4
EMG 1500-PN
PC
SubD 9pol.
SubD 9pol.
2
3
5
7
8
6
1
4
Figure 2: RS-232 cable
