TDK-Lambda RFE2500 Series User manual

IA746-04-01 Rev. E
RFE2500 & RFE2500/S (PMBUS) SERIES INSTRUCTION MANUAL
CHAPTER 1: RFE2500 & RFE2500/S (PMBus) SERIES SPECIFICATIONS......................................1
1.1 RFE2500 rated output Current and Voltage versus Line Voltage. ............................. 3
1.2 RFE2500 Output Power vs. Temp derating. ............................................................... 4
1.3 RFE2500 Outline Drawing .......................................................................................... 5
1.4 Rear Panel IN/OUT Connector Pins Function Description ..................................... 6
CHAPTER 2: SAFETY APPROVALS ...........................................................................................7
2.1 Safety Instructions...................................................................................................... 7
CHAPTER 3: SINGLE UNIT OPERATION .................................................................................11
3.1 Rear Panel Indicator ................................................................................................. 11
3.2 Single unit operation................................................................................................ 12
3.2.1 Basic configuration (Local Sense) ............................................................... 12
3.2.2 Basic configuration (Remote Sense)........................................................... 12
3.2.3 ON/OFF Control by Enable.......................................................................... 13
3.2.4 Output Voltage Programming by Built-in Potentiometer .......................... 13
3.2.5 Output Voltage Programming by PMBus (Optional) .................................. 13
3.2.6 Output Voltage Programming by External Voltage .................................... 14
3.2.7 Current Programming by PMBus (Optional)............................................... 14
3.2.8 Over Current Programming by External Voltage........................................ 15
3.2.9 SUPERVISORY Signals (Typical Connection)................................................ 15
CHAPTER 4: POWER SUPPLIES CONNECTION .......................................................................16
4.1 Parallel Operation .................................................................................................... 16
4.2 Series Operation....................................................................................................... 17
CHAPTER 5: PMBus INTERFACE OPTION ..............................................................................18
5.1 RFE2500/S Series I²C Specification........................................................................... 18
5.1.1 PMBus Interface Option ............................................................................. 19
5.1.2 RFE2500 May Have Optional Power Management Bus Hardware............. 19
5.1.3 Addressing (A2, A1, A0 Inputs) ................................................................... 19
5.1.4 Serial Clock.................................................................................................. 19
5.1.5 Serial Data................................................................................................... 19
5.1.6 SMB Alert .................................................................................................... 20
5.1.7 PMBus Typical Connection ......................................................................... 20
5.2 PMBus Command Set............................................................................................... 21
5.2.1 Read Status ................................................................................................. 21
5.2.2 Clear Faults ................................................................................................. 21
5.2.3 Operation (ON/OFF) ................................................................................... 21
5.2.4 Commands to Read Inventory Details ........................................................ 21
5.3 Programming and Monitoring Functions ................................................................. 22
5.3.1 Monitoring Output Voltage (READ_VOUT)................................................. 22
5.3.2 Monitoring Output Current (READ_IOUT).................................................. 23
5.3.3 Monitoring Supply Temperature (READ_TEMPERATURE_1) ..................... 23
5.3.4 Programming Output Voltage (VOUT_COMMAND)................................... 23
5.3.5 Programmable Maximum Output Voltage (VOUT_MAX)........................... 24
5.3.6 Programming Output Current Limit............................................................ 24
5.3.7 Enabling / Disabling Monitoring Filter........................................................ 24

1
CHAPTER 1: RFE2500 & RFE2500/S (PMBUS) SERIES SPECIFICATIONS
RFE2500 SERIES SPECIFICATIONS:
RFE2500-12
RFE2500-12/S
RFE2500-24
RFE2500-24/S
RFE2500-48
RFE2500-48/S
1
Rated output voltage
V
12
24
48
2
Output voltage set point
V
12+/-1%
24+/-1%
48+/-1%
3
Output voltage range
V
9.6~13.2
19.2~29.0
38.4~58
4
Rated Output Current at 180 ≤ Vin ≤ 265Vac (*1)
A
200
96
52
5
Rated Output Current at 170 ≤ Vin ≤ 180Vac (*1)
A
200
96
50
6
Rated Output Current at 100 ≤ Vin ≤ 132Vac (*1)
A
125
62.5
31.25
7
Rated Output Current at 85V ≤Vin < 100Vac (*1)
A
Linear derating 1.3% per 1Vac from output current at 100Vac.
8
Rated output power at 180 ≤ Vin ≤ 265Vac
W
2400
2304
2496
9
Rated output power at 170 ≤ Vin ≤ 180Vac
W
2400
2304
2400
10
Rated output power 100 ≤ Vin ≤ 132Vac
W
1500
1500
1500
11
Rated output power 85Vac ≤ Vin < 100Vac
W
Linear derating 1.3% per 1Vac from output current at 100Vac.
12
Input voltage / frequency range (*2)
---
85~265Vac continuous, 47~63Hz, Single phase.
13
Maximum input current (at 115/230Vac) (*3)
A
15/12.
14
Power Factor (Typ.) (at 115/230Vac) (*3)
---
>0.99/0.98 at maximum output power.
15
Efficiency at 75% rated load (Typ.) (*3)
%
90/92
90/92
91/93
16
Efficiency at 100% rated load (Typ.) (*3)
%
89/91
89/91
90/92
17
Inrush current (*4)
A
Less than 50.
18
Hold-up time (*13)
mS
≥ 10mS typical at 115/230Vac input, rated output voltage and less than 80% of rated load.
19
Maximum line regulation (*5)
%
0.25
20
Max load regulation (*6)
%
0.50
21
Output Ripple and noise P-P (*7)
0~+70°C
mV
240
240
480
-10~0°C
mV
360
360
780
22
Temperature stability
---
0.05% of rated Vout for 8hrs after 30min warm-up. Constant line, load and temp.
23
Temperature coefficient of output voltage
PPM/°C
+/-200.
24
Remote sensing (*8)
---
Possible. Refer to Instruction Manual.
25
Parallel operation (*9)
---
Possible. Single wire current share, 5% accuracy of rated Iout, up to 8 units of the same voltage rating.
26
Series operation
---
Possible (with external diodes), 2 units. Refer to Instruction Manual.
27
Over current protection
85V ≤ Vin < 132Vac
---
Minimum 105% of rated output current.
170V ≤ Vin < 265Vac
---
105~120% of rated output current.
28
Over voltage protection (*10)
V
Tracking OVP, range: 1.1xVout, accuracy: +/-3%, refer to Instruction Manual.
29
Over temperature protection
---
Inverter shut down method, automatic recovery.
30
Remote On/Off control
---
By electrical signal or dry contact. Refer to Instruction Manual.
31
"DC OK" signal (*14)
---
Tracking, On when Vout>90+/-5% of output voltage setting.
32
Over-Temperature warning (*14)
---
Refer to Instruction Manual.
33
"AC FAIL" signal (*14)
---
On when 85Vac<Vin<270Vac.
34
Auxiliary power supply output (*3)(*11)
---
11.2~12.5V, 0.5A. 240mVp-p ripple and noise.
35
Vout programming by external voltage
---
By 0~5V, equal to Vout min ~ Vout max. Refer to Instruction Manual.
36
Vout programming by external resistor
---
By 1Kohm potentiometer. Refer to Instruction Manual.
37
OCP programming by external voltage
---
By 0~5V. Refer to Instruction Manual.
38
Rear panel indicators
---
DC OK. Refer to Instruction Manual.
39
I²C Interface
---
Optional, PMBus compatible. Refer to Instruction Manual.
40
Operating temperature (*16)
---
-10~+50°C: 100% load.
+50°C to +60°C Derate 2%/°C of load.
+60°C to +70°C Derate 2.5%/°C of load.
41
Storage temperature
---
-30~85°C.
42
Operating humidity
---
10~90% RH, no condensation.
43
Storage humidity
---
10~95% RH, no condensation.
44
Cooling
---
By internal Fans. Variable speed control based on ambient temp and power level.
45
Vibration
---
At no operation, 10-55Hz (Sweep for 1min.), 2G Constant X, Y, Z 1h each.
46
Shock
---
Less than 20G.
47
Conducted emission (*15)
---
Built to meet EN55032 Class B, FCC part 15 Class-B, VCCI Class-B.
48
Radiated emission (*15)
---
Built to meet EN55032 Class A, FCC part 15 Class-A, VCCI Class-A.
49
Immunity
---
Built to meet IEC61000-4-2 (Level 2,3),
-3 (Level 2), -4 (Level 2), -5 (Level 3,4), -6 (Level 2), -8 (Level 4), -11
50
Applicable safety standards
---
IEC 62368-1 UL62368-1 CSA22.2 No.62368-1 EN62368-1.
51
Withstand voltage
Input-Output:
---
3000Vrms, 1min.
Input-Ground:
2000Vrms, 1min.
Output - Ground:
500Vrms, 1min.
500Vrms, 1min.
2250Vdc, 1min.
52
Isolation resistance
---
More than 100Mohm at 25°C and 70% RH. Output-Ground: 500Vdc.
53
Leakage current (*12)
mA
Less Than 0.8/1.6 at 115/230Vac range.
54
Weight (Typ.)
Kg
Max. 2.5.
55
Size (W*H*D)
---
107x41x320mm. Refer to Outline Drawing.

2
Notes:
*1 Refer to (Paragraph 1.1).
*2 For cases where conformance to various safety standards (UL, EN etc.) is required, input voltage to be
described as 100-240Vac (50/60Hz).
*3 At 115/230Vac, 25˚C ambient temperature.
*4 Not applicable for the noise filter inrush current less than 0.2mS.
*5 From 85~132Vac or 170~265Vac, constant load.
*6 From No-load to Rated load, constant input voltage. Measured at the sensing point in Remote sense.
*7 Measured with JEITA-RC9131A 1:1 probe with 4x270uF electrolytic capacitors and 1uF film capacitor on the
output, 20MHz B.W.
*8 Voltage drop on load wires: RFE2500-12: 0.25V/wire; RFE2500-24: 0.5V/wire; RFE2500-48: 1V/wire.
*9 Accuracy applicable for load current > 80% of rated output current. Derate maximum output power by 5%.
*10 Inverter shut down method. Reset by AC voltage recycle or by On/Off control.
*11 Measured with JEITA-RC9131A 1:1 probe with 470uF electrolytic capacitor and 0.1uF film capacitor on the
output, 20MHz B.W.
*12 Measured according to UL, EN method at 60Hz, 25˚C ambient temperature.
*13 Measured from input-off until the output voltage drops under 5% from the nominal voltage.
*14 Open collector signal. Maximum sink current: 10mA, maximum voltage 15V.
*15 RFE2500 series considered as professional equipment and not intended for sale to general public.
*16 Refer to Output Power vs. temp derating (Paragraph 1.2).

3
1.1 RFE2500 rated output Current and Voltage versus Line Voltage.
Figure 1–1: RFE2500-48; 48/S
Figure 1–2: RFE2500-24; 24/S
Figure 1–3: RFE2500-12; 12/S
21A
25A
31.25A
43A
52A
265Vac
170Vac
132Vac
100Vac
85Vac
42A
50A
62.5A
79.4A
96A
265Vac
170Vac
132Vac
100Vac
85Vac
100A
125A
181.8A
200A
265Vac
170Vac
132Vac
100Vac
85Vac
91A
2496W Max
1500W Max
1200W Max
Iout
Vin
2304W Max
1500W Max
1200W Max
Iout
Vin
2400W Max
1500W Max
1200W Max
Iout
Vin
38.4~48V
58V
19.2~24V
29V
9.6~12V
13.2V

4
1.2 RFE2500 Output Power vs. Temp derating.
Figure 1–4: Output Power at temp -10~50°C.
Figure 1–5: Output Power derating at temp 60°C.
Figure 1–6: Output Power derating at temp 70°C.
RFE2500-12, 48V
1500W
1350W
1200W
Pout
Vin
2400W
265Vac
170Vac
132Vac
100Vac
85Vac
RFE2500-24V
1500W
1350W
1200W
Pout
Vin
2300W
265Vac
170Vac
132Vac
100Vac
85Vac
RFE2500-12, 48V
1200W
1080W
960W
Pout
Vin
1920W
265Vac
170Vac
132Vac
100Vac
85Vac
RFE2500-24V
1200W
1080W
960W
Pout
Vin
1840W
265Vac
170Vac
132Vac
100Vac
85Vac
RFE2500-12, 48V
825W
810W
720W
Pout
Vin
1320W
265Vac
170Vac
132Vac
100Vac
85Vac
RFE2500-24V
825W
810W
720W
Pout
Vin
1265W
265Vac
170Vac
132Vac
100Vac
85Vac

5
1.3 RFE2500 Outline Drawing

6
1.4 Rear Panel IN/OUT Connector Pins Function Description
J1 – Main Connector
Pin #
Function
Description
Referenced to
J1-1, J1-15 -SENSE
Negative sense.
The -SENSE signal should be connected to -V on Power Supply or Load side.
-SENSE
J1-2 +SENSE
Positive sense.
The +SENSE signal should be connected to +V on Power Supply or Load side.
+SENSE
J1-3
VOLTAGE
PROGRAMMING
Input 0~5V. Provides Vout programming by Voltage.
Refer to Section 3.2.4, Section 3.2.5 and Section 3.2.6.
-SENSE
J1-4
CURRENT
PROGRAMMING
Input 0~5V. Provides Current programming by Voltage.
Refer to Section 3.2.7 and Section 3.2.8.
-SENSE
J1-5 V_REF
Variable when Voltage/Current programming is done with PMBus option. Refer
to Instruction Manual
-SENSE
J1-6 TEMP ALARM
TEMP ALARM signal. LOW when the internal temperature is within safe limit;
HIGH approx. 10°C below Thermal shut down. Open collector type (15V, 10mA).
SIGNAL RETURN
J1-7 DC OK
DC OK signal. LOW when the output voltage is higher than 85~95% of Vout set.
Open collector type (15V, 10mA).
SIGNAL RETURN
J1-9
ENABLE
Turns ON the main output by electrical signal or dry contact (0~0.6v or short).
SIGNAL RETURN
J1-8, J1-1
0,
J1-19 SIGNAL RETURN
Return for the following control signals: ENABLE supervisory signals TEMP
ALARM, AC FAIL, AUX and PMBus signals: SCL, SDA, SMB ALERT,
SIGNAL RETURN and mentioned signals are isolated from the output terminals
and -SENSE.
J1-11
Local -SENSE
Negative Output Voltage (Can't supply load current)
-V
J1-12
Local +SENSE
Positive Output Voltage (Can't supply load current)
+V
J1-13
TRIMMER
Refer to Section 3.2.4.
-SENSE
J1-14
+5V
5V fix output for standard option unit.
-SENSE
J1-16 AC FAIL
AC FAIL Signal; LOW when the input voltage is 85Vac<Vin<270Vac;
HIGH when the input voltage is Vin<85Vac or Vin>270Vac.
Open collector type (15V, 10mA).
SIGNAL RETURN
J1-17,J1-18 CURRENT SHARE
Current sharing signal should be connected when Power Supplies are connected
in parallel to allow accurate current share between units.
-SENSE
J1-20 +12V AUX OUT
11.2~12.5V Auxiliary Voltage Output. Maximum load current is 0.5A.
This output has a built in O-Ring diode.
Not affected by the ENABLE signal or any other fault.
SIGNAL RETURN
J2 - Optional PMBus interface
J2-1, J2-2,
J2-3
A2, A1, A0
(optional PMBus)
PMBus Address lines. Refer to the PMBus interface description RFE Instruction
Manual Section 5.1.3.
-SENSE
J2-4
Remote (-) SENSE
Negative sense.
-SENSE
J2-5
SMB ALERT
(optional PMBus)
PMBus INTERRUPT signal.
Refer to the PMBus interface description RFE Instruction Manual.
SIGNAL RETURN
J2-6
SDA
(optional PMBus)
Serial Data signal.
Refer to the PMBus interface description RFE Instruction Manual.
SIGNAL RETURN
J2-7
SCL
(optional PMBus)
Serial Clock signal.
Refer to the PMBus interface description RFE Instruction Manual.
SIGNAL RETURN
J2-8 SIGNAL RETURN
Return for the following control signals: ENABLE supervisory signals TEMP
ALARM, AC FAIL, AUX and PMBus signals: SCL, SDA, SMB ALERT,
SIGNAL RETURN and mentioned signals are isolated from the output terminals
and -SENSE.
SIGNAL RETURN
TB
TB-1
AC LINE
AC LINE. Refer to Section 2.1 for Safety Instructions.
TB-2
AC NEUTRAL
AC NEUTRAL. Refer to Section 2.1 for Safety Instructions.
TB-3
PROTECTIVE GROUND
AC GROUND. Refer to Section 2.1 for Safety Instructions.
Table 1-1: Rear panel IN/OUT pins
Figure 1–7: IN/OUTPUT CONNECTORS

7
CHAPTER 2: SAFETY APPROVALS
UL 62368-1 and CSA22.2 No. 62368-1 - UL Recognized. C-UL for Canada.
IEC 62368-1 - CB Test Report and Certificate.
EN 62368-1 – TUV mark, CE mark.
Marking of the CE symbol indicates compliance to the EMC Directive, the Low Voltage Directive and RoHS Directive of the
European Union.
A “Declaration of Conformity” in accordance with the preceding directives and standards has been made and available on
file at our EU representative TDK LAMBDA GERMANY GmbH, located at Karl-Bold-Str. 40, D-77855 Achern.
A "Declaration of Conformity” may be accessed via company website www.uk.tdk-lambda.com/technical-data
2.1 Safety Instructions
CAUTION: The following safety precaution must be observed during all phases of operation, service and repair of this
equipment. Failure to comply with the safety precautions or warnings in this document violates safety standards of design,
manufacture and intended use of this equipment and may impair the built-in protections within. TDK Lambda shall not be
liable for user’s failure to comply with these requirements.
Vorsicht
Die folgenden Sicherheitsvorschriften müssen vor Inbetriebnahme und in jedem Betriebszustand bei Service oder
Reparatur beachtet werden. Missachtung der Sicherheitsvorschriften und Warnhinweise aus diesem Handbuch führen
zur Verletzung der bestehenden Sicherheitsstandards. Bei Betrieb des Gerätes ausserhalb dem bestimmungsgemässen
Einsatz können die im Gerät integrierten Schutzfunktionen beeinträchtigt werden.
TDK-Lambda ist nicht haftbar für Schäden, die durch Missachtung dieser Sicherheitsvorschriften entstehen können.
CAUTION: RFE2500-xy units are not authorized for use as critical component in nuclear control systems, life support systems
or equipment for use in hazardous environments without the express written approval of the managing director of TDK-
Lambda.
Vorsicht
Dieses Produkt ist nicht für die Verwendung als kritische Komponente in nuklearen Steuerungssystemen,
lebenserhaltenden Systemen oder Geräte für den Einsatz in gefährlichen Umgebungen, ohne die ausdrückliche
schriftliche Genehmigung durch TDK-Lambda zugelassen.
POWER SYSTEM, OVERVOLTAGE CATEGORY & ENVIRONMENTAL CONDITIONS
The RFE2500-xy units have been evaluated for using in TT and IT (230VAC line - to - line) power systems.
The RFE2500-xy units have been evaluated to Overvoltage category II.
The RFE2500-xy units intended for use in the following operation conditions:
* Indoor use * Pollutiondegree 2 * Max. Operational altitude: 3000m above sea level
*Ambient temperature: -10°C-50°C at 100% load, up to 70°C with output de-rating applied (refer to Specification above).
GROUNDING
RFE2500-xy units are Class I product. To minimize electrical shock hazard, the RFE2500-xy units must be connected to an
electrical ground. The instruments must be connected to the AC power supply mains through a three conductor power
cable, with the ground wire firmly connected to an electrical ground (safety ground) at the power outlet. For instruments
designed to be hard- wired to the supply mains, the protective earth terminal must be connected to the safety electrical
ground before any other connection is made. Any interruption of the protective ground conductor or disconnection of the
protective earth terminal will cause a potential shock hazard that might cause personal injury.
In addition, a screw through the end-equipment’s chassis to the power supply chassis must be fastened that would
connect the power supply to an electrical ground, refer to figure 2-1. This ground-dedicated screw must be other than the
mounting screws, must not serve as a means to fix any other component, and must be free of any glue or coating in order
to secure a solid and reliable connection. In case of doubt, earthing test (resistance of the protective bonding system) shall
be conducted to verify reliability of connection to the earthing system of the equipment.
To properly conduct this earthing test, stream an electric current with a magnitude of 60 A DC or AC, and the test voltage
shall not exceed 12 V, for a duration of 2 minutes between the head of the earthing screw and any other accessible
conductive part on the power supply.
Compliance criteria shall be that the voltage drop over the protective bonding system shall not exceed 2.5V.

8
Erdungskonzept
RFE2500-xy-Netzteile sind Produkte der Schutzklasse I. Um die Gefahr eines Stromschlags zu minimieren, müssen die
RFE2500-xy-Netzteile an eine Schutzerde angeschlossen werden. Die Geräte müssen über ein dreiadriges Netzkabel an
das Wechselstromnetz angeschlossen werden, wobei der PE-Anschluss fest mit einer elektrischen Masse (Schutzerde) an
der Netzsteckdose verbunden sein muss. Bei Geräten, die für eine feste Verdrahtung mit dem Versorgungsnetz ausgelegt
sind, muss der PE-Anschluss mit dem Schutzerder verbunden werden, bevor eine andere Verbindung hergestellt wird.
Jede Unterbrechung des Schutzleiters oder Unterbrechung des PE Verbindung führt zu einem möglichen elektrischen
Schlag, der Personenschäden verursachen kann.
Zusätzlich muss eine Schraubverbindung von dem Gehäuse des Endgeräts zum Gehäuse des Netzteils erstellt werden, die
das Netzteil mit einer Schutzerde verbindet (siehe Abbildung 2-1). Diese geerdete Schraube muss sich von den
Befestigungsschrauben unterscheiden, sie darf nicht als Mittel zur Befestigung anderer Komponenten dienen und muss
frei von Klebstoff oder einer Beschichtung sein, um eine solide und zuverlässige Verbindung zu gewährleisten. Im
Zweifelsfall ist eine Schutzleiterprüfung (Widerstand des Schutzverbindungssystems) durchzuführen, um die
Zuverlässigkeit der Verbindung mit dem Erdungssystem des Gesamtsystems zu überprüfen.
Zur ordnungsgemäßen Durchführung dieses Schutzleitertests muss ein elektrischer Strom mit einer Stärke von 60 A DC-
oder AC-Strom fließen, und die Prüfspannung darf während einer Dauer von 2 Minuten zwischen dem Kopf der
Erdungsschraube und jedem anderen zugänglichen leitenden Teil der Stromversorgung 12 V nicht überschreiten.
Konformitätskriterien müssen sein, dass der Spannungsabfall über dem gesamten Schutzleitersystems 2,5 V nicht
überschreiten darf.
Figure 2–1: Recommended wiring

9
LIVE CIRCUITS
Operating personnel must not remove the RFE2500-xy unit cover.
No internal adjustment or component replacement is allowed by non-TDK Lambda qualified service personnel. Never
replace components with power cable connected. To avoid injuries, always disconnect power, discharge circuits and
remove external voltage sources before touching components.
Restricted Access Area: RFE2500-xy units should only be installed in a Restricted Access Area. Access should be available to
service personnel only.
Spannungsführende Teile
Die Geräteabdeckung darf nicht durch Endanwender geöffnet werden. Interne Modifikationen, sowie Bauteileaustausch
ist nur durch TDK-Lambda qualifiziertes Personal erlaubt. Vor Austausch von Bauteilen ist das Netzkabel bzw. die
Versorgungsspannung zu trennen. Energieversorgungsanschlüsse sind immer zu trennen, um Personenschäden durch
gefährliche Energieinhalte und Spannungen auszuschliessen. Die Stromkreise sind zu entladen, externe
Spannungsquellen sind zu entfernen, bevor auf Bauteile bzw. Komponenten Ebene gearbeitet wird.
PARTS SUBSTITUTIONS & MODIFICATIONS
Parts substitutions and modifications are allowed to authorized TDK Lambda service personnel only. For repairs or
modifications, the instrument must be returned to TDK Lambda service facility.
AC INPUT
Do not connect RFE2500-xv unit to mains supply exceeding the input voltage and frequency rating. The input voltage and
frequency rating is: 100-240V~, 50/60Hz. For safety reasons, the mains supply voltage fluctuations should not exceed
±10% of nominal voltage.
HEAT HAZARD
WARNING: Top, bottom and side surfaces may become hot when operating the unit continuously. To reduce the risk of
injury from a hot surface, allow the surface to cool before touching.
Heisse Oberflächen
WARNUNG: Im Dauerbetrieb erwärmen sich die Gehäuseoberflächen. Um dasVerletzungs-Risiko durch heisse
Oberflächen zu minimieren, sollte das Gerät einige Zeit abkühlen können, bevor weitere Arbeiten durchgeführt
werden.
ENERGY HAZARD
The main output of RFE2500-xy units is capable of providing hazardous energy. Due to hazardous energy level the output
and connections therefore must not be user accessible. Manufacturer’s final equipment must provide protection to service
personnel against inadvertent contact with output bus bars.
FUSE
Internal fuse is sized for fault protection and if a fuse was opened it would indicate that service is required. Fuse
replacement should be made by qualified technical personnel.
RFE2500-xy unit fuse rating is described below. F101: F25A H 250Vac.
SICHERUNGEN
Vor Anschluss an die Netzversorgung ist die Aufstellanleitung zu beachten!
1. Absicherung: F101: F25A H250VAC
2. Die Gehäuseabdeckung darf nur im stromlosen Zustand geöffnet werden.
ACHTUNG: Sicherungen dürfen nur durch geschulte Service Personen getauscht werden.
OVERCURRENT PROTECTION:
A readily accessible branch circuit over-current protective device rated 30A max. Must be incorporated in the building
wiring. The protective device must be disconnect both supply line simultaneously.
Überstromschutz
Eine leicht zugängliche Vorsicherung mit 30A max.. pro Eingang muss in der Hausinstallation vorgesehen
werden

10
SYMBOLS/ ZEICHEN:
Caution, risk of danger. Instruction manual symbol. The instrument will be marked with this symbol
when it is necessary for the user to refer to the Safety & Installation or Instruction manual.
Achtung Gefahr. Symbol im Benutzerhandbuch. Das Gerät wird mit diesem Symbol gekennzeichnet,
wenn der Benutzer auf das Sicherheits- & Installationshandbuch oder die Bedienungsanleitung
verwiesen wird.
Indicates ground terminal.
Zeigt einen Erdungsanschluss an.
Protective Ground Conductor Terminal.
Schutzleiterklemme.
CAUTION Live component danger due to electric shock or energy content.
VORSICHT Spannungsfuhrende Teile-Gefahr durch elektrischen Schlag bzw. Energieinhalte.
Indicates the presence of a hot surface or component. Touch of a hot surface can cause injury.
Dieses Symbol weist auf das Vorhandensein einer heißen Oberflache oder Komponente. Das Beruhren
dieser Oberflache kann zu Verletzungen fuhren.
Direct current (DC).
Gleichstrom (DC).
Alternate current (AC).
Wechselstrom (AC).
Denotes hazard. A procedure requires specific attention. Not following the procedure correctly
could result in a personal injury. A WARNING sign should not be skipped and all indicated
conditions must be fully understood and met.
Weist auf Gefahren hin, die eine besondere Aufmerksamkeit erfordern. Eine Nichteinhaltung
dieser Vorgehensweise, kann zu Körperverletzungen führen. Ein WARN-Hinweis sollte nicht
übergangen und alle angeführten Bedingungen müssen eindeutig verstanden und umgesetzt
werden.
Denotes hazard. A procedure requires specific attention. Not following the procedurecorrectly
could result in damage to the equipment. Do not proceed beyond a CAUTION sign until all indicated
conditions are fully understood and met.
Weist auf Gefahren hin, die eine besondere Aufmerksamkeit erfordern. Wenn die beschriebene
Vorgehensweise nicht korrekt durchgeführt wird, kann dadurch das Gerät beschädigt werden. Führen
Sie einem VORSICHTS-Hinweis erst durch, wenn Sie alle angezeigten Handlungen eindeutig verstanden
und umgesetzt haben.

11
CHAPTER 3: SINGLE UNIT OPERATION
3.1 Rear Panel Indicator
1. DC OK – LED indicator:
GREEN Output Voltage is above 90% ± 5% of set Output Voltage.
OFF Output Voltage is below 90% ± 5% of set Output Voltage.
Figure 3–1: Front Panel Indicator
*J1 Mating connector comes with basic configuration settings.
ATTENTION:
Power supplies are factory programmed to the rated output voltage. For applications requiring lower / higher voltage,
power supplies should be adjusted to the required voltage before connection to the load.
*J1 DC OK LED J2 TB1 *Use UL approved Insulated Terminal Lugs

12
3.2 Single unit operation
3.2.1 Basic configuration (Local Sense)
•± SENSE have to be connected to the RFE2500 ± Local SENSE terminals prior to operating the supply.
•ENABLE input must be connected to SIGNAL RETURN in order for the supply to turn on.
Figure 3–2: Local Sense Connection
3.2.2 Basic configuration (Remote Sense)
•± SENSE have to be connected to the ±V terminals on the Load side prior to operating the supply.
•ENABLE input must be connected to SIGNAL RETURN in order for the supply to turn on.
Figure 3–3: Remote Sense Connection
ATTENTION:
1. Maximum voltage drop on load connection:
RFE2500-12: 0.25V/wire; RFE2500-24: 0.5V/wire; RFE2500-48: 1V/wire.
2. Twisted wires should be used for Remote Sensing connection.
3. If Remote Sensing is used, do not break Main Output connection.
+V
-V
+SENSE J1-2
-SENSE J1-1
LOCAL +SENSE J1-12
LOCAL -SENSE J1-11
ENABLE J1-9
SIGNAL RETURN J1-19
VOLTAGE PROG. J1-3
TRIM J1-13
-V
+V
-V
+SENSE J1-2
-SENSE J1-1
ENABLE J1-9
SIGNAL RETURN J1-19
VOLTAGE PROG. J1-3
TRIM J1-13
-V
+V
LOAD

13
3.2.3 ON/OFF Control by Enable
SIGNAL RETURN and ENABLE control are isolated from the output terminals and“-SENSE”.
Figure 3–4: Control by ENABLE
3.2.4 Output Voltage Programming by Built-in Potentiometer
Output Voltage of RFE2500 Series can be trimmed by potentiometer between approximately 80%-120% for
24V, 48V and 80%-110% for 12V of nominal output voltage (For Output voltage limits see Graph below).
Figure 3–5: Control by Ex. Potentiometer
Figure 3–6: Output Voltage Limits
3.2.5 Output Voltage Programming by PMBus (Optional)
Output Voltage of RFE2500 Series can be programmed by PMBus between approximately 80%-120% for 24V, 48V and
80%-110% for 12V of nominal output.
Figure 3–7:
Programming by PMBus
ATTENTION:
For section 3.2.4, 3.2.5 and 3.2.6 Current programming pin (J1-4) must not be left open.
Switch closed: Output ON
Switch open: Output OFF
RFE2500
TRIM J1-13
VOLTAGE PROG. J1-3
60
50
40
30
20
10
0
0%
50%
100%
58
29
13.2
48
24
12
……..
RFE2500-48
RFE2500-24
RFE2500-12
9.6
19.2
38.4
Voltage Trimmer by Potentiometer
Potentiometer position
Vout
RFE2500
VOLTAGE PROG. J1-3
V_REF J1-5
ENABLE J1-9
SIGNAL RETURN J1-19
RFE2500

14
3.2.6 Output Voltage Programming by External Voltage
Output Voltage of RFE2500 Series can be programmed by external voltage source between approximately
80%-120% for 24V, 48V and 80%-110% for 12V of nominal output voltage
(For Output voltage limits see Graph enclosed analog voltage programming 0.5V~5V).
Figure 3–8:
Control by Ex. Voltage
Figure 3–9:
Output Voltage Limits
3.2.7 Current Programming by PMBus (Optional)
Over Current Protection (OCP) can be programmed by PMBUS with a range of 50% ~ 110% of Nominal Output Current.
ATTENTION:
If PMBus is used for current programming, the Reference voltage will not be fixed to 5V but variable.
Figure 3–10:
Current Programming by PMBus
RFE2500
-SENSE J1-1
0~5V
+
60
50
40
30
20
10
0
0
2
5
58
29
13.2
3
RFE2500-48
RFE2500-24
RFE2500-12
Voltage Programming
VOLTAGE PROG. [V]
Vout [V]
1
4
RFE2500
CURRENT PROG. J1-4
V_REF J1-5
VOLTAGE PROG. J1-3

15
3.2.8 Over Current Programming by External Voltage
Over Current Protection (OCP) can be programmed by external voltage source 0~5V. By changing the Current
Programming Voltage OCP level could be decreased down to ~40% of Nominal Output Current.
Figure 3–11:
Current Programming by Ext. Voltage
Figure 3–12: Current Limit Programming
3.2.9 SUPERVISORY Signals (Typical Connection)
The following supervisory signals are accessible:
•DC OK
•AC FAIL
•PS EXIST
•TEMP ALARM
Figure 3–13:
Signals
SIGNAL RETURN and mentioned signals are isolated from the output terminals and -SENSE.
These signals are Open Collector type (max 15V, max 10mA) shunted by internal 24V Zener, isolated from Output and
referenced to “SIGNAL RETURN”.
Figure 3–14: Open collector signals are shunted by internal 24V Zener
RFE2500
-SENSE J1-1
CURRENT PROG. J1-4
0~5V
+
120%
100%
80%
60%
40%
20%
0
0
2
5
3
Current Limit Programming
VOLTAGE PROG [V]
Icl / Irated
1
4
10kΩ10kΩ10kΩ
RFE2500
DC OK J1-7
+12V AUX J1-20
AC FAIL J1-16
TEMP ALARM J1-6
SIGNAL RETURN J1-8

16
CHAPTER 4: POWER SUPPLIES CONNECTION
4.1 Parallel Operation
Figure 4–1: Parallel Connection
•Up to 8 x RFE2500 units with the same rating (voltage and
current) can be used in parallel to increase the output
current.
•By connecting the CS signal between the paralleled units,
automatic current balance is achieved with accuracy of
Accuracy ±10%: 20% ≤Iout <80% of max Iout.
Up to 8 units
Accuracy ±5%: Iout ≥ 80% of max Iout.
Up to 8 units.
•Derate the total output current by 5% when using parallel
operation to prevent unit overload condition.
•The built-in O-Ring MOSFETs on the main output and the
12V Auxiliary output allow N+1 operation.
•If Voltage programming is used, "VOLTAGE PROG.” pin of
all units must be connected in parallel.
•Referenced to “SIGNAL RETURN” (floating from the
output) controls/signals and +12V AUX can be connected
in parallel.
•ENABL
E of all supplies can be connected to a single switch.
For PMBus option.
•If voltage programming is done with PMBus, Voltage
Programming and V_REF
of all units must be connected in
parallel.
•
Connect PMBus Signals in parallel (PMBUS is isolated from
output), and choose different address for each unit.
•If Current Programming is done with PMBUS, Current
Programming and V_REF of all units must be connected
in parallel.
RFE2500
+V
+SENSE J1-2
-SENSE J1-1
-V
ENABLE J1-9
SIGNAL RETURN J1-8
CURRENT SHARE J1-17
LOAD
+V
-V
VOLTAGE PROG. J1-3
TRIM J1-13
RFE2500
+V
+SENSE J1-2
-SENSE J1-1
-V
ENABLE J1-9
SIGNAL RETURN J1-8
VOLTAGE PROG. J1-3
CURRENT SHARE J1-18
RFE2500
+V
+SENSE J1-2
-SENSE J1-1
-V
ENABLE J1-9
SIGNAL RETURN J1-8
V_PROG J1-3
CURRENT SHARE J1-17
CURRENT PROG. J1-4
+5V J1-14
CURRENT SHARE J1-17
CURRENT PROG. J1-4
+5V J1-14
CURRENT PROG. J1-4
+5V J1-14

17
4.2 Series Operation
•Up to 2 units with the same rating (voltage and current) can be used in series to increase the output voltage.
•Connect Main Output in series (as shown).
•Diodes should be connected in parallel with each unit output to prevent reverse voltage. Each diode should be
rated to at least the power supply rated output voltage and output current.
•Connect as shown: +Sense of positive unit and –Sense of negative unit (twisted pair) to Load point, or to +V
and –V accordingly for Local Sense.
•In case PMBus is used, Connect PMBus signals in parallel (PMBus is isolated from Output), and choose different
address for each unit (see section 5.1.3).
•Output Voltage can be adjusted independently for each unit.
•Controls Monitoring signals and +12V AUX are referenced to “SIGNAL RETURN” and may be connected in
parallel.
Figure 4–2:
Series Connection (Remote Sense Configuration)
* Diodes rated to at least Vout max and lout max are supplied by user.
RFE2500
+V
-V
RFE2500
LOAD
+V
-V
+SENSE J1-2
-SENSE J1-1
ENABLE J1-9
SIGNAL RETURN J1-8
VOLTAGE PROG J1-3
TRIM J1-13
CURRENT PROG. J1-4
+5V J1-14
+SENSE J1-2
-SENSE J1-1
+V
-V
ENABLE J1-9
SIGNAL RETURN J1-8
VOLTAGE PROG J1-3
TRIM J1-13
CURRENT PROG. J1-4
+5V J1-14

18
CHAPTER 5: PMBUS INTERFACE OPTION
5.1 RFE2500/S Series I²C Specification
1. FEATURES
1.1 Output voltage measurement
1.2 Output voltage programming.
1.3 Output current measurement
1.4 Internal ambient temperature measurement
1.5 Product information
1.6 Status information
1.7 SMBus alert
1.8 Clock frequency: 100KHz
1.9 Address lines: 3
2. OUTPUT VOLTAGE MEASUREMENT
RFE2500-12/S
RFE2500-24/S
RFE2500-48/S
2.1 Measurement accuracy
-
+/-2% of full scale. Refer to instruction manual
2.2 Measurement resolution
-
10 bit
2.3 Measurement range (Full Scale, Only for Accuracy Calculation)
V
0~15
0~30
0~60
3. OUTPUT VOLTAGE PROGRAMMING
RFE2500-12/S
RFE2500-24/S
RFE2500-48/S
3.1 Programming accuracy
-
+/-2% of full scale
3.2 Programming resolution
-
10 bit
3.3 Programming range
V
9.6~13.2
19.2~29.0
38.4~58
4. CURRENT LIMIT PROGRAMMING
RFE2500-12/S
RFE2500-24/S
RFE2500-48/S
4.1 Programming accuracy
-
+/-8% of full scale
4.2 Programming resolution
-
10 bit
4.3 Programming range
V
50~110% of full scale
5. OUTPUT CURRENT MEASUREMENT
RFE2500-12/S
RFE2500-24/S
RFE2500-48/S
5.1 Measurement accuracy (*1)
-
+/-10% of full scale
5.2 Measurement resolution
-
10 bit
5.3 Measurement range (Full Scale, Only for Accuracy Calculation)
A
0~240
0~120
0~60
(*1) Applicable for load above 15% of nominal output current
6. INTERNAL AMBIENT TEMPERATURE MEASUREMENT
6.1 Measurement device accuracy
-
±3°C
6.2 Measurement resolution
-
10 bit
6.3 Measurement range

0~100
7. PRODUCT INFORMATION
7.1 Product ID
-
Factory programmed
7.2 Model Name
-
Factory programmed
7.3 Revision
-
Factory programmed
7.4 Serial Number
-
Factory programmed
7.5 Manufacturing location
-
Factory programmed
7.6 Coefficients
-
Factory programmed
7.7 Date of Manufacture
-
Factory programmed
7.8 Nominal Output
-
Factory programmed
8. STATUS INFORMATION
8. 1 "FAN FAIL" Signal
-
"1" -FAIL, "0"-OK
8.2 "DC FAIL" Signal
-
"1" -FAIL, "0"-OK
8.3 Output "OVP" Signal
-
"1"- OVP, "0"-OK
8.4 "TEMPERATURE ALARM" signal
-
"1"- ALARM, "0"-OK
8.5 "OTP" Signal
-
"1" -OTP, "0"-OK
8.6 "AC FAIL" Signal
-
"1" -FAIL, "0"-OK
8.7 I²C ON/OFF control
-
"1" -ON, "0"-OFF

19
5.1.1 PMBus Interface Option
The communications bus signals are powered by an external 3.3V power source pulled up with a 1.5kΩresistor.
5.1.2 RFE2500 May Have Optional Power Management Bus Hardware
The PMBUS interface in the RFE2500 (/S option) includes:
•Monitoring the Output Voltage, Current and Temperature.
•Programming the Output Voltage and Current.
•Programming the Maximum allowed output Voltage.
•Programming the Supply On/OFF.
•Reading and Clearing Faults.
•Reading the Manufacturing Related Data (Model Name, Serial No, Manufacturing Date, etc.).
•Storing the following conditions at AC Off.
-Set Output voltage / Current limit (OCP).
-Max allowed programmable output voltage.
ATTENTION:
If PMBus is used for voltage/current programming, the reference voltage will not be fixed to 5V but can be variable
(Reference voltage will be used for voltage/current programming).
The PMBUS supports:
•100 KHz Operation.
•Block Read Protocol.
•Group Command Protocol.
•Direct Data Format for Monitoring and Programming Functions.
5.1.3 Addressing (A2, A1, A0 Inputs)
Three variable address lines allow up to 8 Supplies to be connected on a single bus.
PMBus uses 7 bit addressing.
There is constant part of address and variable part of address:
Constant part of address consists of 4 Most Significant Bits A6, A5, A4, A3 always equals 0010.
Variable part of address consists of 3 Least Significant bits: A2, A1, and A0.
Value of these three bits have to be assigned by hardware connections of 3 pins of the PS connectors.
The Address lines (A2, A1, and A0) are internally pulled up by resistors to +5V.
The address lines can be left open for ‹1› address or connected to -S for ‹0› address.
So, available Address Space contains 8 possible addresses: from 0010000 to 0010111.
In case more than one unit is connected to PMBus, each unit must be set to its own unique address.
Duplicate addressing is not allowed.
For example: First unit – A0(J2-1), A1(J2-2), A2(J2-3) are not connected – ADDRESS 0010111;
Second unit - A0(J2-1) is connected to -SENSE – ADDRESS 0010110;
Third unit – A1(J2-2) is connected to -SENSE – ADDRESS 0010101;
ATTENTION:
A2, A1, A0 signals and -SENSE are NOT isolated from the Output Terminals.
5.1.4 Serial Clock
This line is clocked by the Controller which controls the PMBUS. It should be connected to +3.3V
(Referenced to "Signal RTN") via a 1.5kΩ pull-up resistor.
5.1.5 Serial Data
This is a Bi-Directional line which must be connected to +3.3V (referenced to Signal RTN) via a 1.5kΩ pull up resistor.