Installation Category; Overcurrent Protection - Emerson Rosemount 8732EM Quick Start Manual

Quick Start Guide
Figure 5-13: Low power DC current requirements
0.25
0.2
0.15
A
0.1
0.05
0
10
A. Supply current (amps)
B. Power supply (VDC)
Supply wire requirements
Use 10–18 AWG wire rated for the proper temperature of the application.
For wire 10–14 AWG use lugs or other appropriate connectors. For
connections in ambient temperatures above 122 °F (50 °C), use a wire rated
for 194 °F (90 °C). For DC powered transmitters with extended cable lengths,
verify that there is a minimum of 12VDC at the terminals of the transmitter
with the device under load.
Electrical disconnect requirements
Connect the device through an external disconnect or circuit breaker per
national and local electrical code.

Installation category

The installation category for the transmitter is OVERVOLTAGE CAT II.

Overcurrent protection

The transmitter requires overcurrent protection of the supply lines. Fuse
rating and compatible fuses are shown in
Table 5-6: Fuse requirements
Power system
AC power
DC power
22
15
B
Power supply
90–250VAC
12–42VDC
Rosemount 8732EM Transmitter with HART Protocol
20 25
Table 5-6.
Fuse rating
2 Amp quick acting Bussman AGC2 or
3 Amp quick acting Bussman AGC3 or
March 2019
30
Manufacturer
equivalent
equivalent