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Operating Manual - Pema Protea Equipped Media Amplifier
2. PEMA AMPLIFIER MODELS
2.1 Product Overview
The Pema series of amplifiers are available in the following 120 VAC or 230 VAC mains configurations. Each model
can have an optional factory installed CobraNet or EtherSound network digital audio module. Constant voltage amplifiers can
include 25V, 70V, and 100V output models.
Pema4125 - Eight input, four 125W amp channels, low Z (speaker), or constant voltage (High Z) output models.
Pema8125 - Eight input, eight 125W amp channels, low Z (speaker), or constant voltage (High Z) output models.
Pema4250 - Eight input, four 250W amp channels, low Z (speaker), or constant voltage (High Z) output models.
Pema8250 - Eight input, eight 250W amp channels, low Z (speaker), or constant voltage (High Z) output models.
2.2 Installation Requirements
Each Pema model is 2RU, and weighs 22 pounds (10kg) or less. The model number, mains voltage, and power consump-
tion are indicated on the back panel beneath the AC inlet.
CAUTION: When mounting or connecting the unit, always disconnect it from the mains. Use four screws when mount-
ing the amplifier to the front rack rails. Rear support is also recommended, especially for mobile or touring use. Air flow vents
for cooling the amplifier require the front panel to have access to ambient room temperature air. Cool air is drawn in from the
front. To reduce the risk of fire or electric shock, do not expose this apparatus to rain or moisture. Before connecting to mains
power, make sure that the controls, software, and wiring are all set to the configuration needed for the particular application.
Failure to do so could result in damage to the unit or other components in the system. When setting up and testing the system,
please take special care to double check all connections and settings. Please refer to the specifications section of this manual for
specific input, output, Ethernet, and other amplifier properties to consider in the installation of this product.
2.3 Ethernet Communications Requirements
Ethernet communications with this Pema amplifier can be made by connecting it directly to a PC running Protea
software or connecting it through an Ethernet network router, switch, hub, or patch panel that is connected to that PC. Though
direct connection to a PC is possible, it limits the application to one networked device. Networks using the Cat-5, Cat-5e, and
Cat-6 standard will all work with Pema amplifiers. Maximum cable distance is 100 meters (328 ft) from the nearest router,
hub, or switch. Ashly Pema amplifiers and NE remotes will auto detect their Ethernet network connection, and adapt to either
a straight through pin to pin, or crossover Ethernet cable.
2.3a IP Address - There is no need to assign IP addresses to Pema products used with a PC or a network router. The
router or Link Local Addressing will assign IP addresses to each product automatically.
When a router is not available, most current Pema and NE products have the capability to assign their own IP address
based on Link Local Addressing. This allows the device to operate without the need to set up static IP address. If the only option
is to use an Ethernet switch instead of a router, and communications problems remain which cannot be solved with the use of
the link local standard, each Pema device must have a static IP address assigned from within Protea
selecting "Manual Configuration" in the Network Properties tab of each device, where the system/network administrator must
assign each product its' own unique static IP address, each with the appropriate sub net if applicable.
control
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software. This is done by
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