Fema C Series, User Manual, Page: 26 / 32

FEMA ELECTRÓNICA . Series C . C40-D
26
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 ex -
plained at section
1.29.3
. The relay installed at Opt.2 is controlled
by alarm 2, and is configured from the ‘ Alarm 2 ’ (‘ Alr2 ’) explained
at section
1.29.3
. 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 in
-
strument or standalone for later installation, as they do not require
soldering or special configuration..
2. Output and control modules
2.1 Modules A1 and A2 (relay output) 2.2 Module M1 (analog output)
Opt.1 Opt.2
Terminal A, G Common
Terminal B, H NO - Normally open
Terminal C, I NC - Normally closed
Power
G H I A B C
Signal
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.
Terminal A Vexc +15 Vdc
Terminal B Signal in mA
Terminal C Common
Output signal 4/20 mA (active and passive)
Active output connect terminal A (+15 Vdc) and B (mA)
R
L
<350 R
Passive output connect terminal C (GND) and B (mA)
R
L
< 700 R
Accuracy <0.5% FS
Response time <100 mSeg. + meter response time
Isolation 1000 Vdc
Slots allowed Opt.1
Type of relay 3 contact relay (NC, NO, common)
Current maximum 8 A per relay (resistive load)
Voltage maximum 250 Vac continuous
when switching power lines, with overvoltage category 3, maximum switch-
ing voltage is 150Veff to comply with CE safety requirements
.
Isolation 3500 Veff
Type of terminal plug-in screw terminal, pitch 5.08 mm
Slots allowed Opt.1 for A1 module
Opt.2 for A2 module
NC
Com.
NO
A B C
Opt.1
Common
Vexc
4/20 mA
NC
Com.
NO
Power Signal