Specifications

12 Installer Manual SATEL
DTM - keypad bus data
CKM - keypad bus clock
+EX - power supply output for powering the devices connected to expander bus
(13.6...13.8 V DC)
DT - expander bus data
CK - expander bus clock
AUX - power supply output (13,6...13,8 V DC)
Z1...Z8 - zones
OUT3...OUT8 - programmable low-current outputs, OC type
5.5 Connecting devices to the keypad bus
The bus wires must be run in one cable.
The distance between the keypad (or other device to be connected to keypad bus) and
the control panel may be up to 300 m.
Devices installed far from the control panel may be supplied locally from a separate
power source.
Supply voltage measured at the LCD keypad terminals, with the display and key
backlight on, must not be lower than 11 V.
Fig. 3. Connection of keypads (other devices should be connected in a similar way).
The Table 1 shows the number of wires required for correct connection of the device to the
keypad bus if the straight-through cable with conductor cross-section 0.5 mm
2
is used.