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SENTRON
RS485 Expansion Module
Operating Instructions
Read and understand these instructions before installing,
operating, or maintaining the equipment.
DANGER
!
Hazardous voltage.
Will cause death or serious injury.
Turn off and lock out all power supplying this device before
working on this device.
CAUTION
Reliable functioning of the equipment is only ensured with
certified components.
Important note
The products described here were developed to perform safety–oriented func-
tions as part of an overall installation or machine. A complete safety–oriented
system generally features sensors, evaluation units, signaling units, and reliable
shutdown concepts. It is the responsibility of the manufacturer to ensure that a
system or machine is functioning properly as a whole. Siemens AG, its regional
offices, and associated companies (hereinafter referred to as "Siemens") cannot
guarantee all the properties of an entire plant, system or machine that has not
been designed by Siemens.
Nor can Siemens assume liability for recommendations that appear or are implied
in the following description. No new guarantee, warranty, or liability claims be-
yond the scope of the Siemens general terms of supply are to be derived or in-
ferred from the following description.
Application
The PAC RS485 expansion module is designed for use with SENTRON PAC
Power Monitoring Devices. The PAC RS485 expansion module integrates the
SENTRON PAC Power Monitoring Device into power management systems and
automation systems.
The PAC RS485 expansion module
•
supplies the values measured by the Power Monitoring Device to the master,
e.g. the Modbus Master.
•
receives information, e.g. commands, from the master and sends them to the
Power Monitoring Device.
Required tools for installation
See Figure 2. To connect cables with end ferrules to the screw terminals, you
also require a compression tool in accordance with EN 60947–1.
Mounting and connecting
Mounting position:
vertical on the SENTRON PAC
Mount the RS485 expansion module before operating the SENTRON PAC. Note
the following:
•
ESD guidelines
•
The guidelines of the Modbus Organization for mounting and grounding, etc.
"MODBUS over Serial Line Specification and Implementation Guide V 1.02"
"MODBUS APPLICATION PROTOCOL SPECIFICATION V 1.12"
a) Only attach the RS485 expansion module to the plastic enclosure.
b) Ensure safe isolation from supply.
c)
Discharge yourself.
d) Mount the Power Monitoring Device.
e) Connect the current terminals and voltage terminals to the SENTRON PAC.
Mounting steps see Figure 3
1.
Connect the PAC RS485 expansion module to the SENTRON PAC. with the
aid of the guide and the anti-twist element.
2.
Tighten the screws connecting the RS485 expansion module to the
SENTRON PAC with a torque of 0.5 Nm.
3.
Connect the PAC RS485 expansion module to the RS 485 network (see
Figs. 2, 5, 6 and 7 and the block diagram in Fig. 4 ).
4.
If necessary, switch on the integral bus terminating resistor (TER) or the re-
sistor for line polarization (PU + PD) (see Figs. 5 and 6).
5.
Ensure sufficient strain relief for all connected wiring.
2
All manuals and user guides at all-guides.com
Configuring
The RS485 expansion module is configured on the display of the SENTRON PAC
Power Monitoring Device..
Fig. 8
Fig. 9
For configuration details, please refer to the following manuals:
•
•
Both these manuals can be found on the SENTRON PAC CD and on the Internet
(see Online Support).
Technical data
ANSI TIA/EIA–485–A
for RS 485 interface, galvanically isolated
from the device
Galvanic isolation between the
SENTRON PAC Power Monitoring Device
and the RS 485 interface
Galvanic isolation of the power supply
Insulating
voltages
Dimensions of enclosure
(height x width x depth)
Degree of protection
Permissible degree of pollution
Dimensions of enclosure with terminal
block (height x width x depth)
Mounting depth of SENTRON PAC Power
Monitoring Device with mounted
PAC RS485 expansion module
Enclosure design
Tolerances
Weight
Connector to SENTRON PAC Power Mon-
itoring Device
Power supply
Cooling
Flammability class
1) Formerly RS 485
7KM9300-0AM00-0AA0
Setting the language on the SENTRON PAC LC display
Setting the configuration data on the LC display of the
SENTRON PAC
"RS485 expansion module"
"SENTRON PACxxxx"
1)
Protective circuit
Maximum insulation volt-
age between the
RS 485 Bus and the
SENTRON PAC
English
5 V ± 5 %
500 V
via an isolated DC–DC converter
500 V
63 mm x 43 mm x 22 mm
IP20
2 in accordance with
IEC 61010–1:2001
74 mm x 43 mm x 22 mm
73 mm with a sheet metal thick-
ness of 4 mm, maximum
VDT 3400 structure 36
according to DIN 16901:1982–11
41 g
14–pin connector
Power supplied by SENTRON PAC
Passive air cooling in form of venti-
lation slots
V–0
Order No.: 3ZW1012-7KM03-0AA0
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