Omega DPF20 Series, Руководство пользователя

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DPF20 Frequency, rate, total or period counter Instruction Manual
2.5 Module S2
Module S2 provides 1 RS-232 ASCII communications port, to install in
DPF20 digital panel meters. Protocol specifications are the same as with
module S4 (see section 2.4) , with only difference that the physical bus is
RS-232 instead of RS-485.
S2 modules allow for point-to-point communication over RS-232 and also
allow for multinode communication over RS-232 using a ‘Daisy-Chain’ type
of connection.
Terminals RX1 and TX1 are for connection to the RS-232 bus. Terminals
RX2 and TX2 are for RS-232 multinode connection. Frames received on
RX1 with destination address different than the local instrument’s ad -
dress, will be retransmitted over the TX2 terminal. In a similar way, frames
received from RX2 with destination address other than the local address,
will be retransmitted over TX1 terminal.
Up to a maximum of 3 S4 modules can be installed in a single instrument,
all modules isolated between them and isolated from all other circuits.
Modules S2 can be ordered pre-installed into a DPF20 digital panel meter,
or standalone for delayed installation, as they do not require soldering or
special configuration.
Option S2
Output type RS-232 ASCII communication port
Bus RS-232
Speed 57.6 Kbps to 600 bps
Data format 8n1 (standard), 8o1, 8n2, 8e1
Protocol ASCII
Architecture ‘master - slave’
Addresses 01 to 31
‘Broadcast’ address 128
Registers see section
2.4.1
Isolation 1000 Vdc
Configuration 3 button front keypad
Temperature operation from 0 to 50 ºC
storage from -20 to +70 ºC
Installation allowed at ‘Opt.1’, ‘Opt.2’, ‘Opt.3’
Power
Opt.2
Opt.1
Op
t.3
A B C D E
ABCDE
Signal
A B C D E
Rear view DPF20
Module Connections
Module S2 - RS-232 ASCII
Terminal A Tx2
Terminal B Rx2
Terminal C Tx1
Terminal D Rx1
Terminal E GND
Table 16 - Connection terminals
Option R2, R4, R6
Output type relay (2, 4 and 6 relays)
Relay type 3 contacts (NC, NO, common)
Maximum current 6 A per relay (resistive load)
Maximum voltage* 250 Vac continuous
* terminals approved for 300 V (as per UL1059, groups B and D) and
160 V (as per VDE at CAT-III and pollution degree 3).
Isolation 2500 Veff
Type of terminal plug-in screw terminal
pitch 5.08 mm
Installation allowed at ‘Opt.1’
Module R2 occupies Opt.1 (2 relays)
Module R4 occupies Opt.1 and Opt.2 (4 relays)
Module R6 occupies Opt.1, Opt.2 and Opt.3 (6 relays)
Modules R2, R4 and R6 provide 2, 4 and 6 relay outputs, to install in
DPF20 digital panel meters.
Configuration is performed from the frontal keypad of the meter, by
setting the parameters at the ‘Opt.1’ configuration menu (not from
the alarm configuration menu (‘ALr.1’, ‘ALr.2’ o ‘ALr.3’) of the instru -
ment).
The menu allows to configure the setpoint, hysteresis, independent
activation and deactivation delays, and a second setpoint to create
alarm windows.
Only 1 modules R2, R4 or R6 can be installed in a single instrument,
as the are not compatible with themselves (2 modules R2 are not ac -
cepted) and are not compatible with modules R1, T1 or SSR.
Modules R2, R4 and R6 are isolated against all other instrument cir
-
cuits.
Modules R2, R4 and R6 can be ordered pre-installed into a DPF20
digital panel meter, or standalone for delayed installation, as they do
not require soldering or special configuration.
2.6 Modules R2, R4 and R6
Rear view DPF20
Power
Opt.2
Opt.1
Op
t.3
A B C D E F
Signal
G H I J K L
MNOPQR
Relay Common Normally Open (NO) Normally Closed (NC)
relay 1 A B C
relay 2 D E F
relay 3 G H I
relay 4 J K L
relay 5 M N O
relay 6 P Q R
Table 17 - Connection terminals