Specifications
FV-40 Series Flame Detector
087-0056 REV F
53
0-20mA Current Output
: The 0-20mA can be Sink
or Source according to the wiring option source (see
General Instructions for Electrical Wiring
). The
maximum permitted load resistance is 600
Ω
.
Table 26: 20 mA Current Output
State
Output
Fault
0 +1 mA
BIT Fault
2 mA ±10%
Normal
4 mA ±10%
IR*
8 mA ±5%
UV*
12 mA ±5%
Warning
16 mA ±5%
Alarm
20 mA ±5%
*Applies to only to models with those sensor types.
Analog Output
The Analog Output is used for fast detection signal
20msec. It provides 0 V at Normal and 5 V at Alarm.
HART Protocol
The HART protocol is a digital communication signal at
a low level on top of the 0-20mA. This is a bi-
directional field communication protocol used to
communicate between intelligent field instruments
and the host system. HART is available in wiring
options 2 and 3.
Through the HART protocol the detector can:
Display set-up
Reconfigure the set-up
Display detector status and definition
Perform detector diagnostics
Troubleshoot
For more details refer to
HART Manual 087-0057
.
Communication Network
: The detector is equipped
with an RS-485 communication link that can be used
in installations with computerized controllers.
The communications protocol is Modbus compatible.
This protocol is a standard and widely used.
It enables continuous communication between a
standard Modbus controller (Master device) and a
serial Network of up to 247 detectors.
