Siemens SINAUT ST7 - Page 221

Installing and putting a SINAUT modem into operation
5.6 LTOP line transformer with overvoltage protection
Station control system
System Manual, 07/2009, C79000-G8976-C178-07
221
The LTOP variants
The housing contains either one LTOP unit (= LTOP 1) or two LTOP units (= LTOP 2). The
following figures show the design of both LTOP variants with their connectors and
configuration switches.
View from above Schematic

;
;
;
6

   
;
;
;
6


5-
   
   

0RGHPFRQQHFWRU
'HGLFDWHGOLQHFRQQHF
/723
X1 Dedicated line (screw terminals 1, 2, 5, 6)
Chassis (screw terminals 3, 4)
X2 Modem attachment 2-wire over screw terminals
X2 + X3 Modem attachment 4-wire over screw terminals
X6 2-wire/4-wire modem attachment over RJ-12 Western connector; for direct connection of
the SINAUT ST7 MD2 modem over the standard connecting cable (RJ-12 – RJ-12) that
ships with this modem.
S1 + S2 Configuration switches