EXA PA 250
Paging Amplifier Module, 250 W
250 W rack amplifier module on 100 V lines for MCS-III, ISAS
250 W RMS100 V line19 in rack
ISASIndustrial Safety Announcement System (PAGA)
Pre-recorded and live safety announcements across the plant from one rack
250 W per amplifier100 V line19 in rack
Ask an engineer about ISAS on WhatsApp →
- Category
- Plant Communication (PA) Systems
- Environment
- Indoor · Outdoor
- Interface
- Stand-alone
Ideal for
- Cement plants
- Steel plants
- Petrochemical refineries
- Chemical plants
- Power generation facilities
What it does
Safety messages on a timer, or live, across the whole plant. ISAS is a central-amplifier PA and general alarm system: a desktop S-mic station plays pre-recorded messages once, repeats them at set intervals, or switches to live paging. The paging controller and 250 W amplifiers sit in one 19 in rack and drive weatherproof loudspeakers on 100 V lines.
- 01
Three modes: play once, repeat at set intervals (60, 120, 180 min …), or live paging
- 02
Desktop S-mic station with LCD and direct message selection
- 03
250 W RMS amplifiers with short-circuit and overload protection
- 04
Paging controller and amplifiers in one 19 in rack
- 05
Weatherproof ABS loudspeakers with built-in line transformer
Specifications
Electrical · 1
| Amplifier isolation | 1.5 kV between primary & secondary for 15 min |
|---|
Acoustic · 2
| Amplifier (EXA PA 250) | 250 W (RMS), 100 V audio line output, 300 W consumption, 220 / 110 V AC |
|---|---|
| Loudspeaker (LSOD) | LSOD-XT, built-in LMT, 100 V line input, 300–3400 Hz, ABS, C clamp |
Mechanical · 5
| Rack | 19 in central equipment rack (IEC 297 / DIN 41494), 600 mm depth |
|---|---|
| Paging controller (PCU) | Amplifier control, paging control, S-mic station connectivity; 220 V / 110 V AC; 19 in rack mounted |
| Amplifier body | 18 SWG steel, aluminium powder-coated dial, 12 kg, rack mounted |
| S-mic station | < 3 W; 600 V insulation; S-mic noise cancelling dynamic; desk top; 2 kg approx; 18-gauge powder-coated steel; dustproof |
| Junction box | ABS, wall mount, IP 55 |
Environmental · 2
| Temperature | 0 to +60 °C |
|---|---|
| Humidity | 0 to 95% Rh non-condensing |
Connectivity · 1
| Cabling | 2-core 0.75 mm flexible armoured cable amplifier to LMT; 1.5 sq mm 3-core power cable to rack; signal cable for desk station supplied with equipment |
|---|
Operation · 1
| Concept | Central amplifier design |
|---|
Compare with similar models
Differences first: interface, power, protection and output, then installation. Full specifications are in each model's table.
| Specification | ISAS Industrial Safety Announcement System (PAGA) | MCS-III Industrial PA System, Central Amplifier | WMHS-IIAD Addressable PA Telephone | WMHS-I Page/Private Telephone, Handset Type |
|---|---|---|---|---|
| Interfacediffers | Stand-alone | Analogue | Stand-alone | Stand-alone |
| Power supplydiffers | Not specified | 220/110 V AC | 220 V AC / 110 V AC (switchable) | AC mains 220 / 110 V (system diagram) |
| Power consumptiondiffers | Not specified | < 100 W | < 35 W | < 35 W |
| UPS loaddiffers | Not specified | MCS 24 ports 160 VA (RMS) / peak 240 VA; operator console 20 VA / peak 25 VA; EXA PA 250 320 VA / peak 450 VA | 50 VA (RMS), peak 90 VA | Not specified |
| Insulationdiffers | Not specified | 600 V for 3 min between power source & telephone line | 600 V for 3 min between power source & signal line | 600 V for 3 min between power source & parallel line |
| Cablingdiffers | 2-core 0.75 mm flexible armoured cable amplifier to LMT; 1.5 sq mm 3-core power cable to rack; signal cable for desk station supplied with equipment | 0.5 mm 1-pair telephone cable MCS to each location; 0.5 mm 2-pair cable to operator console; 0.75 mm 2-core flexible cable from amplifiers to horns | Not specified | Not specified |
| Cablediffers | Not specified | Not specified | Parallel loop, 2-core cable | 1.5 sq mm 3-core power cable per unit; 24/0.2 mm 2-core twisted cable for loudspeakers; parallel loop cable (core count to be confirmed) |
| Dimensionsdiffers | Not specified | Rack mounted | 360 × 160 × 180 mm | 360 × 160 × 180 mm |
| Weightdiffers | Not specified | 8.5 kg | 5 kg | 5 kg |
| Housingdiffers | Not specified | 16-gauge powder-coated steel body | 16 SWG powder-coated steel body | 16-gauge powder-coated steel body |
| Environment | Indoor, Outdoor | Indoor, Outdoor | Indoor, Outdoor | Indoor, Outdoor |
| Temperature | 0 to +60 °C | 0 to +60 °C | 0 to +60 °C | 0 to +60 °C |
Questions
Can it repeat a safety message automatically?
Yes. Mode 2 repeats a pre-recorded message at selected intervals such as 60, 120 or 180 minutes.
Related models
All plant communication (pa) systems →
LSOD
Industrial Loudspeaker Horn, Outdoor
Re-entrant ABS loudspeaker horn for outdoor plant paging
300–3400 Hz8 Ω0.8 kg
OC-DTHS-II
Operator Console for MCS-II
Desktop console with zone and all-call keys for the MCS-II
10 W amplifier220/110 V AC< 15 W
Need ISAS for a project?
Tell us the quantity, the plant and the timeline. We reply with a quotation.