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Electrical connections
6 Electrical connections
Page 34 of 88
DANGER
DEATH OR SERIOUS PHYSICAL INJURY DUE TO WORK ON LIVE PARTS.
Fatal injury from electrical current.
Observe the five safety rules for work on electrical systems:
Disconnect mains; protect against unintended reconnection; verify
the absence of voltage; earth and short-circuit; cover or safeguard
nearby live parts.
Connection terminals with the type of protection "Ex e" or "Ex i" are on the
connection board of the Ex p control unit.
Terminal row
X3
X5
X8
Ex e
X12
X7
X8
X9
X16
X14
X13
Ex i
X15
X17
Measurement
card
A1-37S2-7D0001_pz_Manual_Exp-Control-Unit_20210923_0_en.docx
Function
Power supply
2x signal relay, 1x CO each
Enable, with voltage
Indicator relay, 4x NO
Purging gas valve, empty contacts
Purging gas outlet, LAN
Bypass, temperature sensor 1
Parameter enable, temperature sensor 2
Main switch, temperature sensor 3
opt. sensor 1 [ia]
opt. sensor 2 [ib]
p-operator panel
Pressure measurement card
Ex p Control unit
SILAS
pz
Rev. 0
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