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Siemens Building Technologies Commissioning Guide CM1G5192en
HVAC Products 6 Commissioning 26.02.2003
5.5 RS-485 shielding and grounding
Hand
Auto
SED 2
0
I
P
Fn
P(1)
Hz
3029
SED2
+ve
-ve
RS485
2
Hand
Auto
SED2
0
I
P
Fn
P(1)
Hz
30
29
SED2
2
Hand
Auto
SED 2
0
I
P
Fn
P(1)
Hz
30
29
SED2
2
RS485
RS485 RS485
1
30
29
2
1
R2=470Ohm
R1=1KOhm
0 V
Building Management System
(BMS)
Shielding
Shielding
Shielding
Earth Compensating Cable
Termination on the
last drive in the network
5192Z46en
Recommended data cable: 2 x 2 x 0.75 mm
2
(e.g. Li -YCYP-2 x 2 x 0.75 mm2 or LIY(C)Y-0B 2 x 2 x 0.75 mm
2
)
Note: If a 0 V signal is available on the BMS, ideally this should be connected to the 0 V terminal 2 of the SED2.
6 Commissioning
Warnings
Only authorized personnel trained in the setup, installation, commissioning and operation of the product may work
on the product and plant.
Danger
♦
SED2 operate at high voltages
♦ Operation of electrical equipment inevitably involves the use of dangerous voltages in
some components
♦ Emergency stop facilities in accordance with EN 60 204 IEC 204 (VDE 0113) must
remain operative in all operating modes of the control equipment. Resetting the emer-
gency stop facility must not result in an uncontrolled or undefined restart
♦ In cases where faults in the control equipment could cause significant equipment dam-
age or severe physical injury (e.g. potentially dangerous short circuits), take additional
external precautions or provide facilities to ensure or enforce safe operation even in the
event of a short-circuit (e.g. independent end switches, mechanical interlocks, etc.)
♦ Certain parameter settings may cause the VSD to restart automatically after a power
failure
Caution For reliable motor overload protection, the motor parameters must be accurately config-
ured.
The equipment incorporates internal motor overload protection in accordance with UL508C,
section 42. Refer to P0610; I
2
t is the default for ON. Motor overload protection can also be
provided via an external PTC temperature sensor (disabled by default, P0601).
The equipment is suitable for use in a circuit delivering max. 10,000 symmetrical amps
(rms), and is designed for a maximum voltage of AC 230 V / 460 V / 575 V when protected
by a type H or K fuse.
Do not use the variable speed drive as an “emergency stop facility"
(see EN 60 204, 9.2.5.4).
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