Hach HART Manuel D'utilisation page 7

Table 4 Recommended resistance values for externally/loop
powered 4-20 mA circuit
Power supply voltage
12–24 VDC
24–30 VDC
Wiring tables
Table 5 is recommended for HART communication.
Table 5 Wiring information for externally/loop powered outputs
Output Connection
Output C (–) IN
Output C (+) IN
— —
Output B (–) IN
Output B (+) IN
— —
Output A (–) IN
Output A (+) IN
— —
Table 6 is not recommended for HART communication.
Table 6 Wiring information for module powered active outputs
Output Connection
Output C (+) OUT
— —
Output C (–) OUT
Loop resistance
0–250 Ω
250–976 Ω
Connector pin number
1
2
3
4
5
6
7
8
9
Connector pin number
1
2
3
Table 6 Wiring information for module powered active outputs
(continued)
Output Connection
1
Output B (+) OUT
— —
1
Output B (–) OUT
1
Output A (+) OUT
— —
1
Output A (–) OUT
1
This connection method is not recommended for HART communication.
Installation
D A N G E R
Explosion Hazard. For the module installation in classified hazardous locations,
refer to the controller user manual for safety instructions.
D A N G E R
Electrocution Hazard. Always remove power from the instrument
before making any electrical connections.
W A R N I N G
Potential Electrocution Hazard. Only qualified personnel should
conduct the tasks described in this section of the manual.
N O T I C E
Potential Instrument Damage. Delicate internal electronic components
can be damaged by static electricity, resulting in degraded
performance or eventual failure.
To install the module and connect the outputs, refer to
on page 7 and the illustrated steps that follow.
Connector pin number
4
5
6
7
8
9
Wiring tables
English 7