Description
PEPPERL+FUCHS
WE77/EX1
SWITCH AMPLIFIER
OUTPUT: 250V/4A/500VA
SUPPLY: ±15% /45-60HZ
FEATURES:
1-CHANNEL
CONTROL CIRCUIT EEX IA IIC
230 V AC SUPPLY VOLTAGE
REVERSIBLE MODE OF OPERATION
LEAD BREAKAGE (LB) MONITORING
1 RELAY CONTACT OUTPUT (CHANGE-OVER CONTACT) PER CHANNEL
TECHNICAL SPECIFICATIONS:
GENERAL SPECIFICATIONS:
SIGNAL TYPE: DIGITAL INPUT
SUPPLY:
CONNECTION: TERMINALS 11, 12
RATED VOLTAGE: 198 … 253 V AC ; 45 … 65 HZ
POWER DISSIPATION: 1.6 W
POWER CONSUMPTION: APPROX. 2.3 VA
INPUT:
CONNECTION SIDE: FIELD SIDE
CONNECTION: TERMINALS 1-, 2+
OPEN CIRCUIT VOLTAGE/SHORT-CIRCUIT CURRENT: APPROX. 8 V DC /
APPROX. 8 MA
SWITCHING POINT/SWITCHING HYSTERESIS: 1.2 … 2.1 MA / APPROX.
0.2 MA
PULSE/PAUSE RATIO: MIN. 0.5 MS / MIN. 0.5 MS
LINE FAULT DETECTION: BREAKAGE I ≤ 0.1 MA
OUTPUT:
CONNECTION SIDE: CONTROL SIDE
CONNECTION: TERMINALS 7,8,9
OUTPUT: SIGNAL ; RELAY
CONTACT LOADING: 253 V AC/2 A/500 VA/COS Φ MIN. 0,7; 125 V AC/4 A/500 VA COS Φ MIN. 0,7; 40 V DC/2 A/80 W OHMIC LOAD
ENERGIZED/DE-ENERGIZED DELAY: APPROX. 10 MS / APPROX. 20 MS
MECHANICAL LIFE: 107 SWITCHING CYCLES
TRANSFER CHARACTERISTICS:
SWITCHING FREQUENCY: < 10 HZ
INDICATORS/SETTINGS:
DISPLAY ELEMENTS: LEDS
AMBIENT CONDITIONS:
AMBIENT TEMPERATURE: -20 … 60 °C (-4 … 140 °F)
MANUFACTURED IN SINGAPORE
The Pepperl+Fuchs WE77/EX1 is a single-channel switch amplifier for marine control systems. It takes a digital input signal from the field side and switches a change-over relay contact on the control side. The control circuit is rated EEx ia IIC, and the unit runs from a 230 V AC supply (198 to 253 V AC, 45 to 65 Hz). Lead breakage monitoring detects a broken input line, the operating mode is reversible, and LED display elements are fitted. It is supplied in used condition and was manufactured in Singapore.
Key Features
✓ Control circuit rated EEx ia IIC
✓ 230 V AC supply, 198 … 253 V AC, 45 … 65 Hz
✓ Lead breakage (LB) monitoring, breakage at I ≤ 0.1 mA
✓ One change-over relay contact output, 253 V AC/2 A/500 VA
✓ Reversible mode of operation
Marine Applications
✓ Switching signals from field contacts in hazardous areas such as pump rooms
✓ Relay outputs to alarm and monitoring panels
✓ Line break supervision on safety-related digital inputs
Technical Support
Prota Marine provides technical support, repair and onboard installation for the switch amplifier and the wider marine control system. Fault diagnosis covers input line faults and relay output problems, and commissioning support is available when the amplifier goes back into service.
