Electrical Connection; Potential Equalisation - Special Function X And Y; Devicenet, Ordering Option Fieldbus, Code Dn - GEM 4242 Operating Instructions Manual

11 Electrical connection

11.1 Potential equalisation – special function X and Y
Connecting the potential equalisation device
1. Use a screw M4x6 to attach the potential equalisation device to the electrical position indicator.
ð Potential equalisation for metal housings in potentially explosive areas: Minimum 4 mm².
2. Secure the connection against working itself loose.

11.2 DeviceNet, ordering option Fieldbus, code DN

Danger of explosion
▶ Risk of severe injury or death.
Danger from sparking. Never disconnect the connection cables when live.
●
Danger of explosion!
▶ Risk of injury or death!
Do not connect or disconnect the device until the power has been switched off or the area has been classi-
●
fied as non-hazardous.
The standard version of the product (without special function X or Y) must not be used in potentially explos-
●
ive zones.
11.2.1 Net topology - DeviceNet system
To avoid malfunction the trunk cable is fitted with resistors on both sides. The drop cables do not require bus ends.
V+
V-
CAN_H
120 Ω
1/4 W
CAN_L
Shield
Protective Protective
earth earth
Drop cable
Baud rate [kBaud]
125 500 m
250 250 m
500 100 m
www.gemu-group.com
120 Ω
1/4 W
Trunk cable
Maximum cable length
Trunk cable
Thick cable Thin cable
100 m
100 m
100 m
DANGER
DANGER
Max. cable length per
drop cable
6 m
6 m
6 m
23 / 36
11 Electrical connection
Drop cable
Max. drop cable accu-
mulated length
156 m
78 m
39 m
GEMÜ 4242
DeviceNet