Technical Data
REG-FR_versionB1_a_English
04.2013
Position Indicator Interface
Type REG-FR
Codetable
input:
Rs step.
resistor
Function
The REG-FR resistance interface converts the position of a
tap changer with resistor row into a BCD code.
A build-in power supply supports the measure transducer,
voltage outputs and 6 relay.
Tap changer resistors (same values) will be connected to
measure input of REG-FR by only 3 or 4 wires.The value Rs
of one of this resistors should be adjusted by potentiometer R
and will be displayed by a voltmeter on both connectors+, (range DC 5V,Rin >500k/V, with 0,1V/ -in position 'R1;
and 1V/100 -in position R3 with feature 'R13 or
0,5V/, -feature 'R2 on display)
6 relay contacts (NO contacts) and 6 current outputs make
the BCD code available for further use.
+
-
R
REG-F
without BCD offset
output signal
Dez BCD code
20 10 8 4 2 1
0 Ohm
1 x Rs
2 x Rs
.
9 x Rs
10 x Rs
.
28 x Rs
29 x Rs
30 x Rs
1
2
3
0 0 0 0 0 1
0 0 0 0 1 0
0 0 0 0 1 1
10
11
0 1 0 0 0 0
0 1 0 0 0 1
29
30
31
1 0 1 0 0 1
1 1 0 0 0 0
1 1 0 0 0 1
broken wire
39
1 1 1 0 0 1
Transfer behaviour
The BCD code signal at the output will change +1 each time
the input is increased by 1 resistor Rs of the tap changer.
By default the REG-FR is set to 3-wire connection and the
tap-changer resistor with 10 /step in position 'R1 or
100/step in position ‘R3 with feature ‘R13 (2,0 /step for
feature 'R2) . Select row resistor range ‘R1 or ‘R3 with two
jumpers on PCB.
 Up to 37 uniform resistor tap-change positions are
converted into a BCD code.
 programmable input with 3- or 4-wire connection
 up to 100m distance between tap changer and REG-FR
 contacts with AC 250V 2A, DC 220V 150W
 Large auxiliary voltage range of the power supply
Cutting a (red green insulated) wire on pc board and the wire
between connector F1/2d and F2/4d activates the 4 wire
resistance compensation. No measure current flows thru the
tap switch and short disconnections will be surpressed.
Technical specifications
Regulations and standards
IEC1010, IEC801-1 to 6; VDE0110, VDE0160
Interference immunity EN50082-2
Emitted interference
EN50081-2, EN55011
Safety
Safety class / Overvoltage category I / II
Degree of pollution / Test voltage
2 / 2.3kV AC
Supply voltage to auxiliary voltage,
to relay contacts,
Auxiliary voltage to relay contacts
Current supply
Galv. separated Feature H1 AC 85..240V /DC100..264V
Feature H2 AC 20.. 60 V / DC 18..72 V
Power consumption < 6 VA / 6W H1; 1A/T H2; 2A/T
Temperature Operation
0 ... +65°C
Storage, transport
-25 ... +85°C
Mechanical data
Design
Circuit board
Front panel
Configuration
Plug-in connector
19” plug-in modules (8T, 3H)
100 x 160mm
Aluminium, RAL 7035 grey
according to DIN 41494 Part 5
2 units, 'F1': DIN 41612 MH 24+7pole
'F2': DIN 41612 F 48-pole
19” mounting
‘F1’ at Positions ‘n’ and ‘F2’ plus 5T
Degree of protection
IP00
Weight
Plug-in modules  0.3 kg
Input
row resistor
5 .. 50  each step and
100 ..500  each step -feature R13
1.5 .. 10  each step -feature R2
number of tap changer resistors
< 37
resistor tolerance Rs
< 2 % from adjusted value
wire resistance RL
< 20 
3-or 4-wire connection (compensates wire resistance RL)
measure current Ik
0,2 ..10 mA through resistor row
AC voltage on input
<0,5V, >45Hz; BCD ‘39’ error code
Output
BCD 1 ... BCD 20/Vz, to the BCD input (50 V) of the REG-D
Voltage at 10kOhm ON (1) > 10V DC
OFF (0) < 5V DC
U+ voltage output DC 15 V DC; reference BCD GND ;
1.2 kOhm internal resistance
Relays with one working contact each for outputting the
BCD codes1..20/Vz-; Contact closed / open (1) / (0)
Electrical isolation of the relays from each other and
from all other circuits
Contact load
AC 250V 2A DC 220V 150W
Number of switching operations
< 105
Contact assignment
Socket connector
‘F1’ “MH” 24+7-p.
2
4
8
10
14
16
28
30
32
Socket connector
‘F2’ “F” 48-pole
2
4
6
8
20
26
28
30
32
1
z
b
d
Relay BCD 1
Relay BCD 1
Relay BCD 2
Relay BCD 2
Relay BCD 4
Relay BCD 4
Relay BCD 8
Relay BCD 8
Rel. BCD 10
Rel. BCD 10
Rel.20 or sign Rel.20 or signAC/DC L / + current supply
AC/DC N / - current supply
PE
z
U+
GND
BCD 1
BCD 4
BCD 10
b
U+
GND
d
Ik
Rsi
Rsg
GND R
U+
GND
BCD 2
BCD 8
BCD20 or sign -
Technical Data
REG-FR
Features
ID
REG-FR position indicator interface
Galvanically isolated
./.
row resistor Rs / step
8T 3H plug-in modules
REG-FR
AC 85..240 V / DC 100 ..264 V
H1
AC 20... 60 V / DC 18 .. 72 V .
H2
5 ... 50  / 100 ... 500  .
R13
Rs / step
1,5 ... 10  .
R2
select row resistor range ‘R1 or ‘R3 by two jumpers .
An input for tap-change curremt with 0/4..20mA, per tap-change position range and output codes such as BINARY, AWZ or
GRAY are available. The device is also available with a wall-mounting housing.
accessoire: control panel 96x48mm with 20mm display size and wide range input DC 12V …150V
Application with REG-FR
feature 'H1'
REG-FR step resistance --> BCD
3 wire connection
(same wire resistance R L in wire 'I k' and 'GND')
REGSys
F1/16d
BCD 20 or sign(-)
F1/16z
F1/14d
10
F1/14z
F1/10d
8
F1/10z
F1/8d
4
F1/8z
F1/4d
2
3-wire connection active
by 2 wire shortcuts:
on PCD wire redgreen
on pin F2/2d to F2/4d
Trafo tap changer
with connected resistors (same values)
F1/4z
F1/2d
1
F1/2z
F1
F2/2d
F2/4d
Ik, Rsi
Rsg
GND
Ik
Rsi
Accessoire : .
REG-F BCD B4
F2/6d
Rsg
F2/8d
GNDR
96 x 48mm DIN
with 6 inputs for BCD-code DC 12 ...150V;
and wide range power supply H1 oder H2
tap display
shield
BCD 1
BCD
F2/28z
2
F2/28d
F2/30z
8 F2/30d
10 F2/32z
20 or sign(-) F2/32d
4
cable length l
cable length l, AWG
GND
GND
F2/26d,z
V 24b BCD1 input LV
(50V)
V 26b 2
V 28b 4
V 30b 8
V 24z 10
V 26z or 30z 20
V 32b,32z GND
GND
< 100m
18AWG (0,8mm 2)
< 40m
20AWG (0,5mm 2)
GND
F2/26d,z
U+
U+
F2/20d,z
1,2kOhm
N (-) L (+)
F1/32
F1/30 F1/28
protective earth PE
19" rack
Adjust step resistance Rs by frontside potentiometer R to +0,2% accuracy. For unknown row resistance Rs shows a LED in
the center of '+' connector the middle of step position with potentiometer turning.
With feature ‘R3 and Rs >100/step a 2 wire connection is recommened. Connect pins F2/ 6d – 8d and F2/2d –4d for this case.
When there is a large distance between the REG-FR and the resistor row Rs, the maximum cable length depends more on
the interference influences of parallel energy cables than on the measure transduce resistance - see example. A superposed
AC voltage of up to 0.5 V is permissible at the REG-FR input. Since each application has different earth and voltage
conditions, the only general statement that can be made is that longer lines are possible if the parallel cables are shielded
and have a larger separation between each other.
example cable length l
wire with 24AWG (0.5mm 2, 4 copper wires with 0.8mm diameter, shielded)
RL
= distance to Rs + switch resist.
= 12 + 3 
l
= R x A / rho
= 12 x 0.5 / 0.02
= 300 m
In standart the first tap (row beginning) shows BCD signal “1”, the tap after the first Rs shows “2” and so on. This could de
changed to –1 …-14 for first step by a negative offset for BCD signal. It is selected by 4 solder shortcuts on pc board.
example: standart
first tap: 0x Rs --> diplay = position 1;
max: 37x Rs -->display = position 38
offset –12 positions
first tap: 0x Rs -->pos. -12; 12x Rs-->pos. -0; max: 31x RS ->position19
For example, on pc board (find wire redgreen) the S81solder shortcuts 8 + 4 + 1 (=13) should be closed, while1 – (-12) =13.
Is negative offset active, the BCD signal output BCD20 changes to sign (-) output and broken wire will be shown as –19.
A. Eberle GmbH & Co. KG
Frankenstr. 160
D-90461 Nürnberg Germany phone 0049 911/ 62 8108-0 FAX/ 62 8108-96