22 496478
3. Installation
against which approval was granted. Note the approval label on the main
PCB.
REN
The Ringer Equivalence Number (REN) of the built in communicator is 1. As
a guide to the number of items of apparatus which can be simultaneously
connected to an exclusive line, the sum of the REN values should not exceed
4. A BT provided telephone is assumed to have a REN value of 1.
Safety Notice
CCT1
CCT2
CCT3
CCT4
CCT5
CCT6
CCT7
CCT8
OP3
OP2
OP1
12V
0V
TR
+
LS
12V AUX
0V
12V AUX
0V
A/T
CLK DATA
0V
12V
Telephone Line
Connections
RJ11
Connector
T.N.V. cct.
T.N.V. cct.
Wire-in comms Connector
S.E.L.V. cct
Main Connector
Battery Connector
S.E.L.V. cct
S.E.L.V. cct
Keypad Connector
S.E.L.V. cct
21VAC from
Transformer
S.E.L.V. cct
Figure 16. SELV and TNV Connectors on the 9750
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