General Monitors FL3112, Руководство пользователя

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Model FL3112
13
POWER INPUTS
+B and 0V
These are the power connections. The supply voltage range is 20 to 36 VDC at the
detector (
low voltage is detected at 18.5 VDC ). The following maximum cable lengths
apply for a +24VDC supply ( maximum 20 ohm loop ):
AWG mm
2
FEET METRES
14 AWG 2.08 4500 1370
16 AWG 1.31 2340 715
18 AWG 0.82 1540 470
20 AWG 0.52 970 300
22 AWG 0.33 670 205
ANALOGUE OUTPUT
4 – 20mA
The 4 to 20mA output is a current signal that corresponds to the following specification:
FAULT signal: 0 to 0.2mA
COPM Fault signal: 2.0
±
0.2mA
Ready signal: 4.0
±
0.2mA
WARN signal: 16.0
±
0.2mA
ALARM signal: 20.0
±
0.2mA
Output Load Max.: 600 ohms
For interfacing with 250 ohm input impedance devices, the following maximum cable
lengths apply (
maximum 50 ohm loop ):
AWG mm
2
FEET METRES
14 AWG 2.08 9000 2750
16 AWG 1.31 5800 1770
18 AWG 0.82 3800 1160
20 AWG 0.52 2400 730
22 AWG 0.33 1700 520
COMMUNICATIONS OUTPUTS
DATA 1A
DATA 1B
DATA 2A
DATA 2B
These are the connections for the RS-485 serial communications ports 1 & 2. The RS-
485 connection is used to either query the unit’s status or to configure the unit. See
Section 7 for detailed information on Modbus RTU protocol.
RELAY OUTPUT (Figure 3-E)
A1 ALM
Description: This connection is the WARN relay contact. The WARN output is immediate
on the Model FL3112. The WARN output can be normally energized or normally de-
energized, latching or non-latching.
WARN relay contact rating is 1A @ 30VRMS/42.2VPK Resistive.