Use the following sections to connect the power supplies, alarm relay, and ground connection.
The power supplies connect to an AC power source and convert the AC current to DC current for the switch to use. The power supplies are redundant; two 240W power supplies do not provide 480W, they only provide 240W. The power supplies must be installed by qualified personnel such as licensed electricians, in accordance with local electrical codes, and connected to a well fused power source.
Warning
Electrical Hazard: Only qualified personnel should perform installation procedures and field wiring to AC primary voltage sourceWarning
Electrical Hazard: Risk of electrical shock and energy hazard. All failures should be examined by a qualified technician. Do not remove the case of the power supply by yourselfWarning
Electrical Hazard: Risk of electric arcs and electric shock (danger to life). Connecting both the primary and the secondary sides together is not allowed.Warning
Do not install the unit in places with high moisture or near water.Warning
The Frame Ground (FG) must be connected to PE (Protective Earth).Warning
Before commencing any installation, maintenance, or modification work, disconnect your system from supply voltage. Make sure that inadvertent connection in circuit will be impossible!Warning
Always enable good ventilation clearances: 5mm left and right, 40 mm above, and 20 mm below the unit in use to prevent it from overheating. Also a 10-15 cm clearance must be kept when the adjacent device is a heat sourceWarning
The appropriate mounting orientation for the unit is vertical, the input terminals at the bottom and output on the top. Mounting orientations other than that, such as upside down, horizontal, or table-top mounting, is not allowed.Warning
To reduce risk of accidental shock or burn, install PSU in a Restricted Access Location. A Restricted Access Location is a location for equipment where both of the following apply:Warning
For continued protection against risk of fire, replace only with same type and rating of fuse.Pour ne pas compromettre la protection contre les risqué d‘incendie, remplacer par un fusible de même type et de memes caractéristiques nominales.
| 18 | 16 | 14 | 12 | 10 | |
|---|---|---|---|---|---|
| Rated Current of Equipment (Amp) | 6A | 6-10A | 13-16A | 16-25A | 25-32A |
| Cross-section of Lead (mm2) | .75 | 1.0 | 1.5 | 2.5 | 4 |
Note
If the power supply possesses multi-output terminals, make sure each contact is connected to wiresto prevent too much current stress on a single contact.
| Model | I/P | O/P |
|---|---|---|
| SDR-240 / 480 | 5 kgf-cm (4.4 lb-in) | 8 kgf-cm (7 lb-in) |
| Model | Fuse | Circuit Breaker | |
|---|---|---|---|
| C16 | D16 | ||
| SDR-240 | T5A/L250V | 4 | 8 |
| SDR-480 | T8A/L250V | 4 | 4 |
| 1 = AC terminal input from power source | 2 = DC terminal output to DC switch terminal input |
The following AC-DC power supplies (PSUs) are available for the ISW-Series switches:
The AC-DC power interface is a 6-pin terminal block with polarity signs on the top panel on most of the ISW-Series switches. The 6-pin terminal block contains an alarm contact in the middle of the terminal block. The power interface for the ISW 24GbP, 4-SFP model switch is a 4-pin terminal block with polarity signs on the rear panel.
Use the following steps to install the power supplies:
See Power Supply AC and DC inputs for the location of the DC output terminals on the power supply. See the following illustrations for the location of the DC terminal inputs on the switch.
Note
Connect the AC-DC power supply to a well-fused power source.
| 1 = First power supply | 2 = Second power supply |
The alarm relay output contacts are in the middle of the DC terminal block connector as shown below.
The alarm relay out is “Normal Open,” and it closes when any predefined failure such as a power failure or an Ethernet link failure is detected.
The relay output with current carrying capacity of 0.5A @ 24 VDC.
| 1 = Alarm relay connection | 2 = Earth ground connector |
To connect the ground connection:
