Eaton ExResistTel ZB, Руководство по эксплуатации

Страница: 64 / 140

29
Keyboard *) - Metal keyboard with protection against ice.
- 21 keys with ABC inscription for name entries.
Position of
operation Mounted upright on the wall. The device must be
mounted on a plane surface only.
Protection Class I M20 x 1.5 sealing plug or threaded 1/2” NPT
adapter for cable entry assembly.
Protection Class II Plastic cable entry
Handset
Sling protection
Integrated, adjustable sling protection.
Handset cord Steel-reinforced steel-clad cord.
Earphone Dynamic capsule with stray-field coil for the
inductive connection of hearing-aids.
Microphone
capsule Electret microphone
Noise suppression Greater than 3 dB by integrated speak-in horn.
Ambient conditions
Protection type:
IP 66 as per EN60529
Protection against
external
mechanical impacts IK 09 as per EN50102
Operating
temperature: -25°C to +60°C
(display does not operate below -20°C)
Storage
temperature: -25°C to +70°C as per IEC60721
Additional features
Clearing key *)
Separate key
Hook switch Dry reed contact without a mechanical cradle
Power supply - from the analogue telephone network.
- no additional mains supply required.
Meter-pulse lock
- Electrical attenuation for 12 kHz and 16 kHz
on the earphone greater than 30 dB with respect
to 1 kHz.
- Impedance (telephone connections A, B):
approx. 13 k
Ω
( 1 V
eff
; 12 kHz ; idle state)
approx. 4 k
Ω
(10 V
eff
; 12 kHz ; idle state)
approx. 2.5 k
Ω
( 1 V
eff
; 12 kHz ; during a call)
approx. 2.3 k
Ω
(10 V
eff
; 12 kHz ; during a call)
approx. 11 k
Ω
( 1 V
eff
; 16 kHz ; idle state)
approx. 4 k
Ω
(10 V
eff
; 16 kHz ; idle state)
approx. 2.5 k
Ω
( 1 V
eff
; 16 kHz ; during a call)
approx. 2.3 k
Ω
(10 V
eff
; 16 kHz ; during a call)
Optical call *)
signalling
Display indicates ( ( ( ) ) )