induced surges and transients from field cabling

Protects 2, 3 and 4 wire transmitters
• Easy and direct mounting — screws
into spare conduit entry
• Intrinsically safe and flameproof to
CENELEC standards
• Parallel connection avoids
introduction of any resistance into
loop
• ATEX approved
• 10 year product warranty

Maximum surge current
20kA peak current (8/20μs waveform)
Leakage current
Less than 10μA at max. working voltage
Working voltage
35V dc maximum
Bandwidth
1MHz
Resistance
No resistance introduced into loop
Ambient temperature limits
-40°C to +85°C
(-40°F to +185°F) (working)
-40°C to +85°C
(-40°F to +185°F) (storage)
Humidity
5% to 95% RH (non-condensing)
Electrical connections
TP48
3 flying leads (line1, line 2 & earth)
TP48 3 Wire
4 flying leads (+ve, -ve, signal & earth)
TP48 4 Wire
5 flying leads (+ve, -ve, signal +ve,
signal -ve, earth)
Wire size: 32/0.2 (1.0mm2, 18 AWG)
Lead length: 250mm (minimum)
Casing
ANSI 316 stainless steel hexagonal bar
stock, male thread
Threads
TP48-3-N & TP48-4-N - 1/2” NPT
TP48-3-I & TP48-4-1 - 20mm ISO )
(M20 x 1.5)
TP48-3-G & TP48-4-G - G 1/2” (BSP
1/2”)
Weight
175g (6.2oz)
Dimensions
See figure 1
EMC compliance
To Generic Immunity Standards
EN50082, part 2 for industrial
environments
Electrical safety
EEx ia IIC T4, Ceq=O, Leq=0; the unit
can be connected without further
certification into any intrinsically safe
loop with open circuit voltage <60V and
input power <1.2W.
EEx d IIC T4; the unit is apparatus
approved to flameproof (explosionproof)
standards, and can be fitted into a
similarly approved housing.

TP48-N Non-certified SPD - 1/2” NPT thread
TP48-I Non-certified SPD - 20mm ISO thread
TP48-G Non-certified SPD - G 1/2” (BSP 1/2 inch)
TP48-3-N Non-certified SPD - 1/2” NPT thread
TP48-3-I Non-certified SPD - 20mm ISO thread
TP48-3-G Non-certified SPD - G 1/2” BSP 1/2 inch
TP48-4-N Non-certified SPD - 1/2” NPT thread
TP48-4-I Non-certified SPD - 20mm ISO thread
TP48-4-G Non-certified SPD - G 1/2” BSP 1/2 inch
TP48-N-NDI Certified SPD - 1/2” NPT thread
TP48-I-NDI Certified SPD - 20mm ISO thread
TP48-G-NDI Certified SPD - G 1/2” (BSP 1/2 inch)
TP48-3-N-NDI Certified SPD - 1/2” NPT thread
TP48-3-I-NDI Certified SPD - 20mm ISO thread
TP48-3-G-NDI Certified SPD - G 1/2” - BSP 1/2 inch
TP48-4-N-NDI Certified SPD - 1/2” NPT thread
TP48-4-I-NDI Certified SPD - 20mm ISO thread
TP48-4-G-NDI Certified SPD - G 1/2” - BSP 1/2 inch