SPECIFICATIONS
Inputs:
4 to 20 mA DC or 2.0 to 10.0 V DC selectable.
Input Impedance:
Current input: 10 ohms, Voltage input: 100K ohms.
Output Ratings:
Control Relays:
SPDT, rated 10A @ 240 VAC res., 1/4 hp @120 VAC,
1/3 hp @ 240 VAC.
Alarm Relays:
SPST, 3A @ 240 VAC res., 1/10 hp @ 120 VAC.
Control Type:
on/off, reverse or direct acting.
Power Requirements:
100 to 240 VAC nominal, +10%-15%, 50 to 400 Hz, single phase;
132 to 240 VDC nominal, +10%-15%.
Power Consumption:
7.5 VA maximum.
Accuracy
: 0.25% of span, 1 least significant digit.
Display:
Two 4 digit, 7 segment 0.56” high LED’s.
Display Resolution:
1 count.
Memory Backup:
Nonvolatile memory (no batteries required).
Serial Communications:
Optional RS-232 or RS-485 with Modbus
®
protocol.
Ambient Operating Temperature / RH:
14 to 131° F (-10 to 55° C) / 0 to 90% up to 104°
F (40° C) non-condensing, 10 to 50% at 131° F (55° C) non-condensing.
Weight:
16 oz. (454 g).
Front Panel Rating:
Meets UL Type 4X (IP66).
Loop Power Supply (isolated):
24 VDC @ 50 mA, regulated.
Seal Failure (Moisture Sensor):
Power Supply to Moisture Sensor:
2.5 VDC.
Search Current:
3 micro amps.
Resistance Sensitivity:
10K to 500K ohms.
Resistance Resolution:
10K ohm steps.
Over Temperature:
Input:
Dry contact on Transistor switch (NPN open collector type).
Current:
1 mADC.
Isolation:
Shares common ground with transmitter input.
Alarm On-Off Differential:
1 count.
Set Point Range:
Selectable.
Power Voltage Stability:
0.05% over the power voltage range.
Temperature Stability:
100 ppm / °C typical, 200 ppm / °C maximum.
Common Mode Rejection:
140 db minimum at 60 Hz.
Normal Mode Rejection:
65 db typical, 60 db at 60 Hz.
Isolation:
Relay:
1500 VAC to all other inputs and outputs.
24 VDC Loop Power:
500 VAC to other inputs and outputs.
Process Output:
500 VAC to other inputs and outputs.
Seal Failure Input:
500 VAC to other inputs and outputs.
Storage Temperature:
-40 to 176° F (-40 to 80° C).
Agency Approvals:
UL 508, CE.
Modbus
®
is a registered trademark of Schnieder Automation.
2
. . 1
. . 2
. . 3
. . 3
. . 4
. 5-7
. 8-9
. . 9
. 10
. 11
1-12
2-13
. 13
. 13
. 14
. 15
5-16
7-23
0-22
4-25
6-28
8-31
4X)
L-20:L-20 9/30/10 11:08 AM Page 2
