Toa HF-250M User manual

TOA INTERCOM SYSTEMS
DESK/SURFACE-MOUNTED
MASTER STATION
HF-250M
DESCRIPTION
The HF-250M desk/surface-mounted type master intercom
station is designed to operate together with a TOA fully
electronic microcomputer-controlled exchange equipped
with a memory for stored program control. The HF-250M
can communicate in full-duplex with all other master
stations in the system. It has a handset and an on-board
electret condenser mic. It is equipped with an auto-dialer
function that can connect a maximum of sixteen (16)
stations by one-touch dialing of a registered station
number. The HF-250M also has an LCD display to show
dialing data and current time. The DT-E70 data transmitting
unit is required for this display.
FEATURES
1. Desk-top or wall mounting.
2. Sixteen auto-dial keys.
3. 12-segment LCD shows calling station number, waiting
station number, and number of waiting stations, plus
current time. DT-E70 data transmitting unit is required
for all except calling station number display.
4. High/Low selectable speaker volume control.
5. External microphone or headset connection.
6. “Spill-proof” keypad.
7. Jack to connect 4-pin modular telephone plug.
8. Programming from keypad.
9. Two-pair twisted wire (22—24AWG).

SPECIFICATIONS APPEARANCE AND DIMENSIONAL DIAGRAM
Handset Microphone &
Speaker
Dynamic type, 130-ohm each
Internal Speaker Dynamic type, 8-ohm, 2.25" (57mm)
dia.,
0.6 watts
Internal Microphone
Keypad
Speaker Volume Control
External Input
Display
Auto-Dialer
Station No. Registration
Capacity
Electret condenser type
“Spill-proof” key switch
High/Lowselectable
Externalmicrophoneorheadsetconnectable
12-segment LCD
8 keys
Max. 16
8.5"(216mm)
Registration Code No.
Wiring Max. 50 digits
Twist2pairs,nonpolar(Deskmountable
via4-pinmodulartelephoneconnector)
Power Requirements
OperatingTemperature
Case Material & Color
Dimensions (W x H x D)
24V DC, 30mA
32°F to 104°F (0°C to 40°C)
ABS resins, pale white
8.5 x 2.5 x 8.2 inches
216 x 69.5 x 208mm
Weight
2.2 Ibs. (960g)
ARCHITECT’S AND ENGINEER’S
SPECIFICATIONS
The master station shall be a TOA HF-250M and shall be capable of
full-duplex communication with other master stations via its dynamic
handset. The HF-250M shall be capable of hands-free communication
with other master stations via its on-board dynamic electret condenser
mic. An external mic or headset may be attached with the unit’s 1/4" jack.
The HF-250M shall be equipped with a 12-segment LCD display, a
modular (TELCO type) jack for standard four-pin connectors, 22-24
AWG wire and an 8-ohm dynamic speaker with volume switch. The
HF-250M shall include an auto-dialer which can connect a maximum
of sixteen (16) stations by one-touch dialing.
DT-E70 SPECIFICATIONS
Power Supply +24V DC (20 to 28V)
Current Consumption 200mA max.
Transmitting Channel 16 channels (Selection with DlP switch on
Numbers PC board)
TransmittingUnit Max. 16 units per system
Transmitting Data per 512 bits (32 words)
Channel
Transmitting Cycle Time
0.32 second/cycle
Transmitting System 2-frequency FSK (frequency shift keying)
TransmittingLine Nonpolar2-conductorcable
(parallel,stranded,shielded)
Output Impedance
16-ohm/600-ohmbalanced
Transmitting Distance Max. 1.24 miles (2km) [1/40" (0.65mm) dia.]
Parallel Connection DR-B61: Max. 50 units/DT-E70
Numbers HF-250M: Max. 16 units/DT-E70
Time Entering Device HF-250M
Operating Temperature 32°F to 104°F (0°C to 40°C)
Installation Method
Desk top or rack mounting
Color Panel: Metallic gold
Case: Colored steel plate—dark grey
(Munsell N3.0)
Dimensions (W x H x D)
Weight
Rack mounting bracket: Metallic gold
17.0 (19.0) x 1.8 x 11.3 inches
432 (483) x 44.5 x 288mm
6.8Ibs.(3.1kg)
DT-E70
Data Transmitting Unit
The DT-E70 data transmitting unit is designed for use with
the EXES-6000 series exchange EX-600/610/620/630. This
unit enables various indication or control functions such as
In/Out announciations, calling party indication and general
purpose control in conjunction with the DR-B61 data
receiving unit and HF-250M intercom station with LCD
display.
* Specifications are subject to change without notice.
TOA Corporation
PrintedinJapan (407) 833-63-027-40