Panasonic KX-TD500 System Reference Manual page 43

11.00 PLC Card
Functions
PLC card (KX-T96172)
(1) PITS and DSS console interface. (8 circuits/
card)
Maximum loop resistance : 40 ohms
Power supply 1 : +30V (supplied through
speech path, and with
current limitation circuit).
Power supply 2 : +15V (supplied through
data line).
(2) PITS (KX-T123230D, KX-T123235, KX-
T7130) interface with OHCA feature.
When a PITS with OHCA feature is connected
to a port, an OHCA piggy back card (KX-
T96136) should be mounted to its interface
circuit.
Operation
LED indicator on the PLC card lights when the
system reset or PLC local reset occurs.
12.00 SLC Cards
12.01 SLC Card
Functions
SLC card (KX-T96174)
(1) Standard SLT interface.
Maximum loop resistance : 600 ohms.
(including SLT)
Power supply : +30V (with current limitation
2 DTMF receivers, dial pulse detector.
(2) Power Failure Transfer (PFT) by each port.
(The KX-T96174X has three interfaces of
PFT.)
When power failure occurs, SLT Tip / Ring are
led by a PFT relay, but SLT PFT modular and
LCOT / GCOT / PCOT / RCOT modular
should be connected each other by
connection cords in advance.
(3) Diagnostic transfer (DT) by each port.
Diagnostic relay is placed in Tip / Ring of each
port.
During diagnostic test, only one diagnostic
relay in the SLT of a system is activated.
Operation
LED indicator on the SLC card lights when
system reset or SLC local reset occurs.
12.02 MSLC Card
Functions
MSLC Card (KX-T96175)
(1)
(2) Same as 12.01 SLC Card
(3)
(4) SLT with Message Waiting Lamp interface
Power supply to Message Waiting
Lamp: +80VDC (when 1mA)
Operation
Same as 12.01 SLC Card
1-E-7
circuit.)