Technical data

8 Monitoring and control, Interfaces
MASTERGUARD Series SIII
UPS Systems from 60 to 800 kVA
14
MKA4CAT0UKSIII/Rev. 11-11/2004/UK
8.7 Interfaces
8.7.1 Slot card bay (available from 60
to 500kVA)
Series S
III shall be equipped with two slot
bays, available for communication card
options. One of the slots shall be
equipped with the LIFE.net slot modem,
fitted as standard (user removable).
The other slot shall be available
for connectivity options. Please
refer to MASTERGUARD Connectivity
Solutions for further details about the
available slot expansion cards. If no
cards are fitted into the slots, the DB9
ports described in sections 8.7.3 and
8.7.4 can be used for other
connectivity applications.
8.7.2 Computer relay interface
Volt-free contacts shall be
incorporated conforming to the
requirements of IBM AS/400 and other
computer types. This interface shall be
via a 9-pin D socket wired as follows:
Pin Signal Explanation
1BYPASS ACTIVE Bypass mode: contact between pin 1 and pin 4 is closed
2AC FAIL (NO) Mains failure: contact between pin 2 and pin 4 is closed
3AC FAIL (NC) Mains failure: contact between pin 3 and pin 4 is open
4 SWITCH COM Common connection for all floating contacts
5LOW BATTERY Just before end of discharge (in battery mode): contact between pin 5 and pin 4 is closed
6 UPS OFF If “mains failure” warning is present, application of 12 V across pin 6 and pin 7 (0 V)
shuts down the UPS
7 SIG GRD (0V) Reference potential for UPS shutdown
8 SUMMARY ALARM UPS fault, contact between pin 8 and pin 4 is closed
9+12V Internal 12 V, 50 mA voltage source for UPS shutdown (pin 6)
Pin Signal Explanation
1 Earth Shield
2 TxD Send RS232
3 RxD Receive RS232
4 Not used
5RS232 GND Signal ground for receive and send
6 Not used
7RTS Clear to send RS232
8 Not used
9 Not used
The Floating contacts shall be rated at 24V, 1A.
This RS232 port cannot be used simultaneously with the corresponding slot bay as described in section 8.7.1
8.7.3 RS232C
Series S
III will be equipped with one D type connector with 9 pins for serial RS232C communication. The connector has the
following pin functions:
Pin Signal Explanation
1 Shield Cable shield
2SST2_TRS232 Send RS232 (Tx)
3SST2_RRS232 Receive RS232 (Rx)
4 Not used
5 Not used
6 Not used
7 M_BT Signal ground
8 Not used
9 Not Used
8.7.4 Combination interface
Series S
III shall be fitted with a slot modem for LIFE.net connection as standard. If this slot modem is removed, this port
may be used for other connectivity applications.
Tecnico-SIII-MG 10-11-2004 8:22 Pagina 14