Output And Control Modules; Modules A1 And A2 (Relay Output); Module M1 (Analog Output) - Omega DP20 User Manual

DP20 Economical Multisignal Meter

2. Output and control modules

2.1 Modules A1 and A2 (relay output) 2.2 Module M1 (analog output)
The A1 (and A2) modules offer 1 relay output to be installed at slot
Opt.1 (module A2 at Opt.2). The relay installed at Opt.1 is controlled
by alarm 1, and is configured from the 'Alarm 1' ('Alr1') menu
explained at section 1.28.3. The relay installed at Opt.2 is controlled
by alarm 2, and is configured from the 'Alarm 2' ('Alr2') explained
at section 1.28.3. Relay with 3 contacts (Common, Normally closed,
Normally open) accepting voltages up to 250V @8A.
The A1 and A2 modules can be ordered installed in to a Series C
instrument or standalone for later installation, as they do not require
soldering or special configuration..
Type of relay
Current maximum
Voltage maximum
when switching power lines, with overvoltage category 3, maximum
switching voltage is 150Veff to comply with CE safety requirements
Isolation
Type of terminal
Slots allowed
Terminal A, G
Terminal B, H
Terminal C, I
3 contact relay (NC, NO, common)
8 A per relay (resistive load)
250 Vac continuous
3500 Veff
plug-in screw terminal, pitch 5.08 mm
Opt.1 for A1 module
Opt.2 for A2 module
Opt.2 Opt.1
Com.
NO
NC
G H I A B C
Signal Power
Common
NO - Normally open
NC - Normally closed
The M1 module offers 1 analog output at 4/20 mA, isolated, to be
installed at slot Opt1.
The 4/20 mA output signal is fully scalable, both with positive and
negative slopes, and is proportional to the reading of the instrument.
The mA output can be connected to work in active loop (the module
provides the power of the loop) or passive mode (the power of the
loop is not provided by the instrument)
Connections
For an active 4/20 mA loop, connect terminal A ('Vexc +15 Vdc') as
current output and terminal B ('Signal in mA') as return of current.
For a passive 4/20 mA loop, connect terminal B ('signal in mA') as
current output and terminal C ('GND') as return of current.
Output signal
Active output
Passive output
.
Accuracy
Response time
Isolation
Slots allowed
Com.
NO
NC
Terminal A
Terminal B
Terminal C
28
Instruction Manual
4/20 mA (active and passive)
connect terminal A (+15 Vdc) and B (mA)
R <350 R
L
connect terminal C (GND) and B (mA)
R < 700 R
L
<0.5% FS
<100 mSeg. + meter response time
1000 Vdc
Opt.1
Opt.1
A B C
Signal Power
Vexc +15 Vdc
Signal in mA
Common
Vexc
4/20 mA
Common