User's Manual

ENRAF
CIU 858
Communications Interface Unit
CIU
H
1
H
2
H
3
H
4
F
1
F
2
H
1
H
2
F
1
F
2
F
3
F
4
PC
running
'Ensite'
TL1: transm. addr. 00-29
TL2:
TL3:
transm. addr. 30-59
transm. addr. 60-99
to Entis
or other host
RS-232C
+
PC
running
'Ensite'
880 CIU Plus
880 CIU Prime
RS-232C
to Entis Pro
and/or other host(s)
4x Enraf field bus lines
3x Enraf field bus lines
a) With 858 CIU b) With 880 CIU Prime c) With other type of host
PC
running
'Ensite'
PET
Enraf
Mains
adapter
RS-232C
PET interface
Enraf
field bus line
Commissioning
Instruction manual 973 SmartRadar LT Page 15
Figure 3.2 Different connections to Enraf field bus line
3.3.2 Communication via RS-232C or RS-485
RS-232C
Connect the RS-232C transmission line from the SmartRadar LT to a service PC where the service tool
“Ensite” is running (refer to figure 3.3a). Default baud rate for RS-232C is 19200 baud.
Continue with section 3.3.4, programming communication parameters.
RS-485
Connect the RS-485 transmission line (eventually via an RS-485 / RS-232C converter) to a service PC
where the service tool “Ensite” is running (refer to figure 3.3b).
Default baud rate for RS-485 is 19200 baud.
When more than one gauge is connected to the same transmission line (multi drop mode), make sure that
only
one
new SmartRadar LT is powered with the default transmission address 00. Also, there may not be
an operational gauge with transmission address 00. If such a gauge exists, do switch it off temporarily.
Continue with section 3.3.4, programming communication parameters.
3.3.3 Communication via HART signal
®
The SmartRadar LT can be configured to give a 4 - 20 mA level output. In this mode it is possible to
configure the SmartRadar LT via the HART communication protocol.
®
Connect the HART transmission line via a HART modem to a service PC where the service tool “Ensite”
®®
is running (refer to figure 3.3c).
A maximum of 15 SmartRadar LT’s with HART output signal can be connected in parallel (multi drop
®
mode); each gauge having a unique HART communication address from 1 to 15.
®
When more than one gauge is connected to the same transmission line (multi drop mode), make sure that
only
one
new SmartRadar LT is powered with the default communication address 0.
Continue with section 3.3.4, programming communication parameters.