SHSP
P. 3 / 4
EM-9308-A Rev.4
INSTALLATION
Set the unit so that its DIN rail adaptor is at the bottom.
Position the upper hook at the rear side of the unit on the
DIN rail and push in the lower. When removing the unit,
push down the DIN rail adaptor utilizing a minus screw-
driver and pull.
TERMINAL CONNECTION
Connect the unit as in the diagram below.
1
2
• Dual Redundant Power Supply
SHSP
24VDC
Power
3
1
2
• Single Power Supply
SHSP
24VDC
Power
3
Connect independent power sources to both terminals 1 – 3 and 2 – 3.
Connect a power source to either of the terminals 1 – 3 or 2 – 3.
DIN Rail
(35 mm wide)
DIN Rail Adaptor
CONNECTING POWER SUPPLY / GROUND
■
POWER SUPPLY (DC power)
Two sets of power input terminals are available on this unit
(negative common).
In order to use two independent power sources for redun-
dancy, connect each to the terminals 1 – 3 and 2 – 3 respec-
tively. In this state, the unit can maintain its operation if
one of the power sources fails.
For single power supply, use either of these terminal sets.
■
GROUNDING
A surge protector is equipped at the LAN port to protect
the unit from surges entering through the LAN cable. It
is designed to direct the surges to the ground when they
enter the port as illustrated in the figure to the above right.
The G terminal, therefore, MUST be grounded. Grounding
resistance of 100Ω is recommended.
If you want to ground the system at multiple points in order
to separate noise interferences for information equipment
and for electric equipment:
1) When there is no potential difference between the two
grounding points, remove the shortcircuit bar connecting
FG and G terminals of this unit and connect the FG to
the ground for the information equipment, and the G to
that for the electric equipment.
2) When there is a potential difference, separate grounding
is not permitted. The shortcircuit bar must remain con-
nected, and only the G terminal must be connected to the
grounding for electric equipment.
LAN Port
COMM
PC CONFIGURATOR
JACK
RJ-45 CONNECTOR
1
2
3
4
5
6
FG
7
G
ALARM CONTACT OUTPUT
Shortcircuit bar (attached)
+
+
–
POWER SUPPLY
(dual redundant)
Grounding
■
DC POWERED
LAN Port
COMM
PC CONFIGURATOR
JACK
RJ-45 CONNECTOR
2
3
4
5
6
FG
7
G
ALARM CONTACT OUTPUT
POWER SUPPLY
Shortcircuit bar (attached)
U
V
Grounding
■
AC POWERED
LOAD
Inductive
Load (Coil)
Varistor or
CR Circuit
• DC Powered
LOAD
Inductive
Load (Coil)
Diode, Varistor or
CR Circuit
■
Relay Protection
• AC Powered
Grounding
LAN Port
Lightning Surge
Surge Protector
SHSP
Control
Circuit
G
