Yodify Product Library
Instantly add the HW48 Data and Signal Surge Protection and 50,000+ more product series to your store or catalog
Book Your Demo and See How
or create your store
HW48 Data and Signal Surge Protection
Brand: MTL InstrumentsThe HW48 device safeguards Honeywell STT350 intelligent transmitters against surges and transients from field cabling.
This Honeywell tested and approved unit fits onto the side of the STT350 transmitter inside the standard ‘flameproof’- Ex d enclosure housing giving a 10kA level of protection.
Installation and earthing is simple so even existing installations can easily be upgraded by retrofitting the HW48.
Analogue and Smart local current meters can be wired into the transmitter and will benefit from protection provided by the HW48.
Features- Built-in Reliability - Solid State
- Simple Installation and Wiring -Customized Mounting
- Retrofittable - Easily Fitted to Transmitters in Existing Installations
- Honeywell Tested and Approved for Use with STT350 Transmitters
- Analogue and Smart Meter Compatible
- 10 Year Product Warranty
Specifications
Brand
Maximum Surge Current
- 10 kA peak current (8/20 μs waveform)
- 10 kV peak voltage (1.2/50 μs waveform)
Leakage Current
- < 2 μA at 32 Vdc
- < 10 μA at Max. working voltage, over full temperature range
Working Voltage
- 48 V dc Max.
Signal Level
- 4/20 mA dc plus DE communications
Series Resistance
- 18 ohms/line (36 ohms loop)
Ambient Temperature Limits
- -40° F to +176° F (-40° C to +80° C) working
- -40° F to +212° F (-40° C to +100° C) storage
Humidity
- 5 % to 95 % RH (non-condensing)
Electrical Connections
- 3-Way terminal block (+ve, E, -ve)
- 1.5 mm*2 Max. Flying lead earth connection
Weight
- 1.7 oz. (48 g) excluding transmitter housing
Electrical Safety
- For hazardous-area use
- Intrinsic safety: Non-energy storing apparatus (< 1.2 V, < 0.1A, < 20 μJ, < 25 mW)
- Ceq=0, Leq=0, the device can be connected into any IS loop with input power < 2W
- Flameproof/Explosionproof: No effect on existing Ex d approval when fitted into an STT350 transmitter in an approved housing