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Connection of an External Initiator
14. CONNECTION OF AN EXTERNAL INITIATOR
DANGER!
Danger of explosion in explosive atmosphere (only in the event of a fault as zone 2)!
• Opening the hood or the housing in an explosive atmosphere is only allowed in a not energized state!
An external initiator can be connected via the small 3-fold screw terminal - at
bottom right on the respective electronics module (in the example: AS-i).
The control head is supplied with a dummy plug on the right connection which
is intended for the external initiator.
To connect an external initiator, a cable gland (SW19, Ø 3 - 6 mm) with suitable
clamping range is required.
Due to the size of the screw terminals, the wire cross-sections of the
external initiator have the following values for the different designs:
0.14 ... 1.5 mm² for design: 24 V, AS-i, DeviceNet;
0.5 ... 1.5 mm² for design: 120 V
Designation of the screw terminals on the different electronics modules:
Designation - according to design Configuration
24 V DC, AS-i DevNet 120 V AC
24 V V+ L Power supply - according to design!
S4 IN S4 IN S4 IN External initiator input
GND GND N GND external initiator (24 V DC, AS-i, DevNet) or
power supply (120 V AC design)
Electrical requirements of the external initiator for the different designs:
The electrical requirements of the external initiator can be found in the respective subchapters "Electrical
data" under the headword "Input / proximity switch (external initiator: S4 in)":
Design 24 V: see Page 39 DeviceNet design: see Page 57
AS-i design: see Page 48 120 V design: see Page 68
Connection procedure:
→ Open the housing following the instructions in Chapter "8. Opening and Closing the Housing".
→ Assemble the connection cables according to the general rules of technology.
→ Insert cables through the cable gland (connection on right) into the interior of the housing.
→ Connect the wires to the connection terminals according to the pin assignment.
→ Close the housing following the instructions in Chapter "8. Opening and Closing the Housing".
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