KEP SC-IF Data sheet

SC-IF SERIES

Features

• 4-20 mA Input (10-50 mA optional)

•0 to 10 kHz Pulse Output

• Two Year Warranty

• Loop Powered

• Input & Output LED Indicators

• Various Mounting Styles

Current to Frequency
Loop Powered Isolator

SIGNAL CONDITIONERS

Flow Instruments

Description:

The SC-IF loop powered signal conditioner whose function is to
provide a 0 - 10kHz frequency output signal in response to a 4­20mA analog input.

The SC-IF appears to the input loop as a series shunt resistor. A
small sense resistor is used to measure the input current. The
input loop derives it’s power from the input current loop.

This input current signal is then scaled and converted to a 0 to
10,000 Hz frequency signal by a Current to Frequency Con­verter. This frequency signal is then transmitted across an opto­isolator to the output stage.

The 10-50 mA range option is provided to enable the unit to
perform range conversions as well as signal isolation.

Specifications:

Analog Input

Available Ranges: 4-20 mA (10-50 mA optional)
Input Type: Two Wire, Loop Powered
Equivalent Input Impedance: 525 Ω on 4-20 mA range

210 Ω on 10-50 mA range
Operational Range: 3.5-33 mA
Over Current Protection: 2.5 times rated span
Reverse Polarity Protection
Isolation Voltage: 500 V
Input Loop Indicator: LED illuminates when loop is pow-

ered by proper polarity

Pulse Output Option

Output Type: Open Collector Transistor
Low Cutoff: 1% of full scale
Range: 0 to 10,000 Hz
Duty Cycle: 50/50 Duty Cycle (nominal)
Maximum Off Voltage: 30 VDC
Minimum On Current: 10 mA
Maximum On Voltage: 1 VDC
Temperature Effect: Less than 200 ppm/degree C
Reverse Polarity Protection

Mounting Styles

DIN Rail Mount: Plastic enclosure with a snap fastener for

fitting to DIN 46 277 and DIN EN 50 022
assembly rails.

NEMA 4: 4.92" x 4.92" NEMA 4 Enclosure for wall

mounting.

Explosion Proof: Aluminum enclosure for:

Class I, Division 1, Groups B, C & D
Class II, Division I, Groups E, F & G.

Listing: CE Compliant

Kessler-Ellis Products • 800-631-2165 F-15 • Flow Instruments • Page 11

Dimensions

Flow Instruments

SIGNAL CONDITIONERS

DIN Rail Mount

Simplified Block Diagram

+

1

4-20mA
Input
Loop

2

–

3.88 (98.5)

I/F

Span

Zero

+ 24 VDC

7

Open Collector

8

9

Common

.89

(22.5)

Mounting holes molded
directly under cover screws.
Max. screw head .29"
(Typ. 4 places)

4.21

(107)

TOP VIEW

PANEL INSTALLED

1.40 (35.5)

2.95 (75)

NEMA4X

To access terminals, remove

4.21

(107)

4.92

(125)

cover and 4 panel screws.

4.92

(125)

.43

(11)

Explosion Proof Enclosure

3/4” NPT (2) HLS.
(feed thru hubs)

.18 (5)

SIDE VIEW

Optional holes
or hub fitting

2.95
(75)

1.93
(49)

Typical Wiring Hookup

+

4-20mA
Output

4-20 mA Output Device

–

SC-IF

1
2

+24 V

7

Open Collector Output

8

Common

9

24 VDC Out
Pulse Input
Common

Pulse Input Device

4.9 - 5.25

(124 - 133)

Ordering Information

5.9 - 7.7

(150 - 196)

4.75 -5

(121 - 127)

Optional 3rd
Conduit Entry

All Dimension in inches (mm)

Page 12 • Flow Instruments • F-15 Kessler-Ellis Products • 800-631-2165

Example SC-IF D ET
Series

IF= Current to Frequency

Mounting:

B= Nema 4X
C= Explosion Proof
D= DIN Rail

Options:

ET= Extended Temp: -4° to 185°F (-20° to 85° C)
T = Third 3/4" conduit entry for Explosion Proof Housing
H2 = 0.875" Hole for NEMA4 mounting style
HF2 = 0.5" Female NPT Hub fitting
H3 = 1.125" Hole for NEMA4 mounting style
HF3 = 0.75" Female NPT Hub fitting

Accessories: (add to end of part number)

DR-4= 4" DIN Rail