GEFAHR 40T-48-4-00-RR-0-0-0-0 controller

2. Wichtigste technische Spezifikationen
3. Universeller Eingang (Configurable via front panel buttons)

Thermoelement: K, J, E, T, R, S, B, N, usw.

FTE: Pt100 (2-Draht / 3-Draht)

Linear signals: 4~20mA, 0~20mA, 0~10V, 0~60mV, usw.

2. Genauigkeit: ±0.2%FS ±1 digit
3. Front panel protection: IP65
4. Overall depth: 99 mm
5. Sampling cycle: 15～120ms adjustable
6. Funktionen: Process value display, bis zu 2 independent alarms, sensor break/short circuit detection; No PID control function
7. Wichtige Anmerkungen

✅ Positioning: Digital indicator with alarm, cannot directly control temperature; only for monitoring + switch alarm output

❌ No RS485 communication, cannot connect to PLC bus

❌ No 4~20mA retransmission output

❌ No built-in 24V sensor power supply

✅ Compatible with DC24V / AC24V power supply

4. Gemeinsame Alternative & Variant Models of the Series

40T-48-4-00-RR-0-0-0-1: Power supply changed to 100~240VAC

40T-48-4-00-RR-0-2-0-0: Equipped with additional 4~20mA analog retransmission output

40T-48-4-24-RR-0-0-0-0: Built-in 24V transmitter power supply

GEFAHR 40T-48-4-00-RR-0-0-0-0 Dimension Parameters

1. Gesamtdimension (W × H × Depth)

48 mm × 48 mm × 99 mm

Standard 1/16 DIN form factor

2. Cabinet mounting cutout dimension

45 mm × 45 mm

Recommended machining tolerance: +0.5mm

3. Ergänzende Angaben

Front panel rating: IP65

Instrument rear depth (inside cabinet): 99mm; reserve ≥105mm internal space for wiring during cabinet design

Model 40T-96 in the same series is horizontal 96×48 version, do not confuse

GEFRAN 40T-48 Measurement Accuracy

Official Nominal Accuracy

1. Thermoelement / RTD Input

±0.2% Full Scale (FS) ±1 digit

Test condition: Ambient temperature 25℃

2. Linear Analog Input (mV, 0~10V, 0/4~20mA)

±0.2% Full Scale (FS) ±1 digit

Temperature Drift

When ambient temperature deviates from 25℃:

≤ ±0.01% FS / ℃

Important Supplementary Notes

1. Auflösung: 4-digit LED display, minimum display unit 1 Ziffer
2. Accuracy only refers to instrument itself, excluding sensor error
3. Alarm actuation accuracy follows measurement accuracy with no additional deviation
4. Einschränkung: No PID regulation, only measurement & Alarm; no control accuracy index

Practical Example

Range set as 0~200℃:

Maximum instrument measurement error ≈ ±0.4℃ ±1 digit

GEFAHR 40T-48-4-00-RR-0-0-0-0 Ausgabekonfiguration

Model output segment: …00-RR-0-0-0-0

1. RR = OUT1, OUT2
2. 7th digit `0`: No 3rd output
3. 8th digit `0`: No analog retransmission output
4. 9th digit `0`: No communication interface
5. Onboard Outputs

2 Relay Outputs

Kontaktformular: Normalerweise geöffnet (NEIN)

Kontaktbewertung: 5A / 250VAC; 5A / 30VDC (ohmsche Last)

Anwendung: High/low limit alarm, limit switch signal; can drive small contactors and indicator lights

✅ Feature: Independent alarm outputs; alarm value and mode (high/low limit, deviation alarm, usw.) can be configured separately

2. Outputs NOT available on this model
3. ❌ No 4~20mA / 0~10V analog retransmission output (digit = 0, nicht 2)
4. ❌ No SSR drive voltage output
5. ❌ No RS485 Modbus communication
6. ❌ No NPN/PNP transistor logic output
7. ❌ No PID control output (this unit is only for monitoring & Alarm, incapable of temperature regulation)
8. Optional Output Combinations of the Series (for model selection reference)

RR: Dual relay (aktuelles Modell)

RS: OUT1 Relay + OUT2 SSR drive output

SS: Dual SSR drive outputs

Suffix digit `2`: Extra 4~20mA analog retransmission output

Suffix digit `4`: RS485 Modbus RTU interface

Wiring Reminder

Relays are passive dry contacts. External power supply is required. The instrument does not supply internal power to contacts; do not connect directly to sensor circuits.

GEFAHR 40T-48-4-00-RR-0-0-0-0 Relay Operation Mode

✅ Both OUT1 and OUT2 relays support custom configuration via front panel

Beachten: This is a digital alarm indicator without PID control. Relays can only be used as alarm outputs, not temperature control outputs.

1. Configurable Alarm Modes (Independent for two relays)
2. Absolute High Alarm (Hi)

Relay energizes when measured value setpoint

2. Absolute Low Alarm (Lo)

Relay energizes when measured value < Sollwert

3. Deviation Alarm (Positiv / Negative Deviation)

Trigger based on deviation relative to setpoint (commonly used for differential monitoring)

4. Sensor Break Alarm

Relay activates on thermocouple/Pt100 open circuit or signal over-range

2. Adjustable Auxiliary Parameters

Alarm Hysteresis: Prevent relay rapid cycling (chatter)

Alarm Latch: Relay stays energized after alarm trigger; manual panel reset required

Power-up Alarm Suppression: Temporarily disable alarms at startup to avoid false triggering

Contact Logic: Select energized on alarm OR de-energized on alarm

3. Critical Limitations
4. Hardware contacts are Normally Open dry contacts. Physical hardware cannot be changed to Normally Closed; “de-energized on alarm” is realized purely by software logic.
5. Cannot be configured as PID on/off control output (40T series is indicator, not PID controller like 400 / 2500 Serie).
6. OUT1 and OUT2 work independently; combination such as high limit on one channel and low limit on the other is supported.
7. Parameter Access Procedure

Lange drücken [F key] für 2 seconds → Enter default password 99

Navigate within `CFG` menu group:

o.1: OUT1 alarm setpoint

o.2: OUT2 alarm setpoint

Select alarm type, hysteresis, latch function and power-up suppression in corresponding submenus