Zone 0
Explosive gas atmosphere present continuously or for long periods
Zone 1
Explosive gas atmosphere likely to occur in normal operation
Zone 2
Explosive gas atmosphere unlikely to occur and, if it does, only for a short period
Zone 20
Explosive dust atmosphere present continuously or for long periods
Zone 21
Explosive dust atmosphere likely to occur in normal operation
Zone 22
Explosive dust atmosphere unlikely to occur and, if it does, only for a short period
# General
Product type: Intrinsically safe Zener barrier
Brand: Pepperl+Fuchs
Series: Z7xx, Z8xx, Z9xx
Channels: 1, 2, 3
Polarity: positive DC, negative DC, AC
Versions: standard, 1 kΩ, current limiting, diode return, high power, asymmetrical, replaceable fuse
Accessories: ZH-Z.ES, ZH-Z.LL, ZH-Z.AR.125, ZH-Z.BT, ZH-ES/LB
# Certifications
ATEX: II (1)GD, I (M1) [Ex ia Ga] IIC, [Ex ia Da] IIIC, [Ex ia Ma] I
Zone 2 installation: II 3G Ex nA IIC T4 Gc
IECEx: [Ex ia Ga] IIC, [Ex ia Da] IIIC, [Ex ia Ma] I; Ex ec IIC T4 Gc
Other approvals: FM, cULus
# Electrical
Working voltage: 0.6 … 26.5 V
Series resistance: 15.5 … 2030.5 Ω
Fuse rating: 50 … 250 mA
Voltage Uo: up to 28 V (model dependent)
Maximum safe voltage Um: 250 V
# Mechanical
Dimensions: 12.5 x 115 x 116 mm (W x H x D)
Mass: approx. 150 g
Connection: screw terminals, max. 2 x 2.5 mm²
Mounting: 35 mm DIN rail acc. to EN 60715
Degree of protection: IP20
Ambient temperature: -20 … 60 °C
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