COMPUTER/LAN INTERFACE (400/600 VA ONLY)

Optional SiteNet 1 kits provide connection to a wide range of popular computer operating systems; such as Novell, UNIX, UNISYS, SUN, WINDOWS and many others. SiteNet 1 software automatically performs an orderly shutdown of computer operating systems, in the event of a power outage and/or low battery conditions.

The SiteNet 1 kit supplies a cable to connect supported computer systems to the UPS communications port (10). The table below shows connector details.

Note: Your dealer supplies computer communications kits separately, if you wish. They come with installation instructions, cable connections, and appropriate computer software.

INTERFACE FUNCTION

DB25 ADAPTER

UPS Shutdown/Active High*

19

On Battery/Return

17

On Battery/Normally Open

16

Low Battery/Normally Open

11

Low Battery/Return

9

UPS Shutdown/Return

7

*Remote Shutdown (5-12V DC, 5-10 mA. max.); battery operation

COLLECTOR TO EMITTER 1

Open Collector

(+)

330 Ohms

(-)

Return

1Maximum voltage and current on pins 11 & 16 are +40V DC; 1.0mA

OPTION SWITCH SETTINGS

On the back of your UPS is a bank of option switches (6) with a removable plastic cover. These switches determine transfer levels and operating frequency. Slide the switches to the left to turn them OFF, to the right to turn ON. Turn OFF equipment and UPS and unplug the UPS prior to changing switch settings, or the UPS will ignore the new settings. Replace the plastic option switch cover.

Option Switch 1: 50/60 Hz Select – When OFF, this switch sets UPS for 60 Hz mains. Output in backup mode will be 60 Hz. When ON, the switch sets UPS for 50 Hz mains and output in backup mode is 50 Hz. The switch must match the mains frequency or the UPS will not start. The factory setting is 50 Hz.

Option Switch 2: High Line Transfer –

250VA model: When ON, this switch transfers the UPS to battery operation when the mains voltage reaches 270 VAC. When OFF, the UPS will not transfer to battery. Factory setting is ON.

400/600VA models: You may select at which voltage the UPS will transfer to battery operation when it encounters a high mains voltage. The ON position transfers the UPS to battery operation at 270VAC; the OFF position transfers at 280VAC. Factory setting is 270 VAC.

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Liebert PS250-50S, PS400-50S, PS600-50S user manual COMPUTER/LAN Interface 400/600 VA only, Option Switch Settings