LPGmass Modbus RS485
Electrical connection
Hauser
25
Safety Barrier Promass 100
A
Safe area
1
L+
2
L
27
26
B
A
Power
supply
24V
DC
Modbus
RS485
10
20
72
62
L+
L
B
A
Power
supply
Modbus
RS485
Hazardous area
Safety Barrier
Promass 100
Power
Communication
Lift panel for
bus termination
1
2
A
A0030220
7
Safety Barrier Promass 100 with terminals
1
Non-hazardous area and Zone 2/Div. 2
2
Intrinsically safe area
7.1.4
Preparing the measuring device
NOTICE
Insufficient sealing of the housing!
Operational reliability of the measuring device could be compromised.
‣
Use suitable cable glands corresponding to the degree of protection.
1. Remove dummy plug if present.
2. If the measuring device is supplied without cable glands:
Provide suitable cable gland for corresponding connecting cable.
3. If the measuring device is supplied with cable glands:
Observe requirements for connecting cables → 22.
7.2
Connecting the measuring device
NOTICE
Limitation of electrical safety due to incorrect connection!
‣
Have electrical connection work carried out by correspondingly trained specialists only.
‣
Observe applicable federal/national installation codes and regulations.
‣
Comply with local workplace safety regulations.
‣
Always connect the protective ground cable before connecting additional cables.
‣
For use in potentially explosive atmospheres, observe the information in the device-
specific Ex documentation.
‣
The power unit must be tested to ensure it meets safety requirements (e.g. PELV,
SELV).