2 electrical connection of the mx48 c – ENMET MX-48 User Manual
Page 8
ENMET Corporation
MX48 C
ONTROL
4
3.2 Electrical Connection of the MX48 C
ONTROL
To make electrical connections, turn off the control using the general
O
N
/O
FF
switch located on the power supply
board, see Figure 1a for location of
O
N
/O
FF
switch.
The
MX48 C
ONTROL
is equipped with an automatic switching circuit to connect to 24
V
DC
power should the 110
V
AC
power fail. Hence, it is possible to use inexpensive backup power supplies.
W
ARNING
:
Continuous gas detection and alarm systems (110
V
AC
/220
V
AC
/ 24
V
DC
/
12
V
DC
powered) become
inoperative upon loss of primary power. Contact factory for specifications and pricing of backup
battery systems.
3.2.1 AC power supply
Voltage:
110
V
AC
(103 to 122 V) 50/60 Hz
Maximum power:
120
V
AC
Maximum input current
2Amp
Cable
3 × 1.5 mm
2
(earth included)
Location of connection terminals:
See Figure 3
Protection:
the phase and neutral wires are protected by time-delay 2A fuses located
on the power supply board
Optional Voltage:
220
V
AC
(207 to 244 V) 50/60 Hz (optional, must specify when ordering)
C
AUTION
:
It is absolutely essential for the
MX48 C
ONTROL
to be connected to earth ground. Connection is provided
within and outside the enclosure. This connection is necessary to ensure the proper operation of
the main power interference suppression filter
the components for protection against electromagnetic interference
3.2.2 DC Supply Input
Voltage:
21 to 30
V
DC
The “minus” of the DC supply is ground and connected to
the chassis.
Maximum power:
150 W
Maximum input current
6.3 Amp
Cable
2 x2.5 mm
2
Location of connection terminals:
See Figure 3
Protection:
There are 2 fuses, (6.3 A) situated on the power supply board