S P E C I F I C A T I O N S
Capabilities
PASCL is designed specifically to automate electric load curtailment and demannd response. Avialable in both Ethernet and the wireless versions, its nearly instantaneous response makes PASCL suitable for real-time notifications of acute power emergencies.
The EMS Interface provides three channels of control. One channel
implements PASCL's unique pulse-scaling feature, which harnesses an existing
Energy Management System (EMS) to provide predictable, responsive curtailment.
The other two channels are relay outputs, which can be used to control
electric loads directly or to dispatch on-site generation. If pulse-scaling
is not required, that channel can be converted to a third relay output
by setting a jumper.
The optional Alert Module
emits audible and visual signals to let personnel at the site know when
a curtailment is underway. The audible signal can be silenced by
pressing a button on the module.
There are several versions
of PASCL software, all of which run under 32-bit versions of Microsoft
Windows. All software utilizes the computer's default Internet connection,
whether it's dial-up, DSL, or another high-speed standard. The Command
Server software creates and serves PASCL commands based on input from third-party,
front-end software. Command Server also confirms delivery of messages
to PASCL units in the field. The Command Generator software is a
simple diagnostic tool for manually creating and sending commands to PASCL.
Custom software solutions can also be provided.
| EMS
Interface |
|
| Output
Channels |
One channel pulse-scaling,
convertible to Form "C" relay contacts
Two channels of Form "C"
relay contacts
All channels electrically
isolated |
| Relay Rating |
30 volts max. AC or DC,
1.0 amp max. |
| Dispatch Capability |
Immediate or scheduled start
and stop times, independently by channel |
| Firmwware |
Stored
in flash memory. Upgradeable by re-programming chip. |
|
Power Supply |
Switch-selectable
120 or 240 VAC, 60 Hz, 0.1 Amp |
|
Operating Temperature |
-40ºC
to +85ºC (-40ºF to 185ºF) |
| Enclosure |
Molded ABS, 8.5"
wide x 5.0" high x 2.3" deep |
| Wireless Version |
|
Communication |
Internet
to two-way Skytel wireless network |
| Transceiver |
Motorola CreataLink 2XT,
using ReFLEX technology |
| Response Time |
30 seconds to one minute,
typical |
| Antenna |
Quarter-wave whip, 3.5 inches
long
Optional 7-inch radome with
6-foot cable, for greater sensitivity |
| Ethernet Version |
|
| Communication |
Internet
to 10/100 Base-T Ethernet, auto-detect
Or, intra-Ethernet, where applicable
|
| Compatibility |
IEEE 802.3
|
| Response Time |
depends on network traffic, but can be less than one second |
| Pulse-Scaling |
|
| Meter Compatibility |
Most electric meters with
open-collector or relay pulse outputs |
| Pulse Connection |
2-wire (KZ) or 3-wire (KYZ) |
| Pulse Input from
Meter |
5 volts across open contacts,
0.05 milliamp through closed contacts |
| Pulse Output to EMS |
Open-collector transistor,
24 volts DC max., 100 milliamps max. |
| Pulse Input Frequency |
200 edges per minute (max.
recommended) |
| Metering Intervals |
Any |
| Alert
Module |
|
| Signals |
Audible and visual (audible
can be silenced by a pushbutton) |
| Connection
to EMS Interface |
6-conductor modular cable
(500 feet max.) |
|
Power Supply |
Provided by EMS Interface |
| Enclosure |
Molded ABS, 4.5"
wide x 3.1" high x 1.3" deep |
