WattMaster WCC III User Manual part 19

18. SAT 3P (Pulsemeter)
Controller Manual

WCC III

18. SAT 3P (Pulsemeter)
Controller Manual

T ABLE OF CONTENTS

SECTION 18: SA T 3P (PULSEMETER)
CONTROLLER MANU AL

Overview ...................................................18-1

SAT 3P Pulse Input and Components ....... 18-2

SAT 3P Addressing .....................................8-4

SAT 3P Basic Wiring .................................18-5

SAT 3P Typical Wiring ..............................18-6

Analog Input Screen ...................................8-7

Energy Consumption Screen ..................18-10

18. SAT 3P INSTALLATION GUIDE

Overview

SECTION 18:
SA T 3P (PULSEMETER)
CONTROLLER MANU AL (SS5013)

__________________________________________

Each SAT III controller has a single general purpose AIN 1 input
that is an Analog Input / high speed binary capture input which can
also be used as a pulse meter input. The SAT III controller can only
interface to 1 pulse meter.

The SA T 3P controller is in the simplest terms a stripped down SAT
III controller. The SAT 3P controller has no binary logic inputs, no
relay outputs, no analog inputs, no analog outputs, and no HSS
expansion port. The SAT 3P controller has eight high speed binary
capture inputs used for pulse meter type inputs.

Why would you want to purchase a SAT 3P controller? Cost and
labor are the major factors. To do tenant sub-metering for 16
tenants, you would normally need to buy 16 SAT III controllers.
This would be a fairly high and costly expenditure. The same 16
tenant sub-metering can now be accomplished by using two SAT
3P controllers. Also, wiring is an issue. It is easier to wire 16 pulse
meter outputs to two SAT 3P controllers than it is to wire to 16
SAT III controllers that could be scattered throughout the building.
The SAT 3P controllers should ideally be located next to the pulse
meters. This is so that the binary outputs from the pulse meters
can readily and easily be connected to the inputs of the SAT 3P
controller.

The SAT 3P controller is used to interface up to 8 pulse meters
per SAT 3P controller. The SAT 3P simulates 8 SAT III satellites
on the WCC III communications loop. The one and only input
that is used per simulated satellite is AIN 1. This AIN1 input is no
longer a general purpose analog input on the SAT 3P controller.
This AIN 1 input is a specialized high speed capture binary input,
and is designed to detect pulse type inputs. All other satellite inputs
and outputs are non-functional on these 8 simulated satellites.
The Trendlog capabilities are still functional on these 8 simulated
satellites.

Figure 18-1: SAT 3P Controller

WCC III Technical Guide

18-1

18. SAT 3P INSTALLATION GUIDE

SA T 3P Pulse Input and Components

When used in conjunction with the WCC III system, the SAT III
controllers and SAT 3P controllers are capable of recording ener gy
demand, energy consumption, as well as sub-metering, and then
automated logging of tenant power usage. Sophisticated turning
OFF of high usage energy equipment when there is high energy peak
demand time is also possible with what is called “Shed and Restore
Program” via the WCC III system. This can be accomplished by
using a pulse meter on the building incoming power that outputs a
binary contact closure to a pulse meter input on a SAT III or SAT
3P controller. Then, by making global analog and/or global binary
determinations, make an intelligent decision as to what equipment
to keep on and what equipment to turn off.

The binary outputs from the pulse meter(s) must be of the isolated
output type. They can be of the optically coupled open-collector
current sink transistor output type or an actual dry contact type of
output. Please consult with WattMaster Controls if you have any
questions at all about the type of connection from the Pulse Meter
to the SAT 3P controller(s).

The binary input circuit equivalent of the SAT 3P controller is
summarized in Figure 18-2:

The E-Mon D-Mon P2 Pulser output module is an optically coupler
interface device that allows the Class 2000 kWh or KWh/Demand
meter to be connected to an energy/building management system
(EMS) for the purpose of data-gathering and/or load control.
The pulse width and value are selected using the 2 DIP switches
and can be tailored to fi t you specifi c requirements in the fi eld. A
modular plug connects the P2 Pulser output module to the E-Mon
D-Mon meter. A two position screw terminal block provides an
easy connection to the EMS (SAT 3P controller). An LED on the
P2 Pulser output module shows the rate and duration of the pulse
output that is going to the EMS (SA T 3P Controller). The P2 Pulser
output module has an output operation of 4.5 to 28 volts DC that is
to be supplied by the EMS. (SAT 3P Controller)

Please refer to Figure 18-3 for referencing the following
components of the SAT 3P controller:

Communications T erminal Block (Labeled TB2)

The SA T 3P connects to the WCC III system the same way as other
SAT III, and SAT 3C/D,F controllers do via a proprietary RS-485
network. The physical network layer consists of a two -wire twisted
pair with shield wire. WattMaster Controls can provide a detailed
specifi cation for this wire as well as provide 500’ or 1000’ spools
of this wire. All terminated wiring is by three position unpluggable
terminal blocks or single unpluggable ¼ inch spade connections.
When terminating wire, connect “R” to “R”, “T” to “T”, and
“SHLD” TO “SH” throughout the whole WCC III system.

Figure 18-2: Schematic showing the SA T 3P Pulse
Input equivalent circuit multiplied times eight circuits

The two position Removable Berg Jumper on each of the eight
Pulse Inputs on the SAT 3P controller are normally connected.
These Removable Berg Jumpers connect a +5 volt DC pull up via
a 10K ohm current limit resistor to each of the eight Pulse Inputs
on the SAT 3P controller. These Removable Berg Jumpers are to
be removed only if an external voltage source is to be used with the
pulse meter output.

WattMaster Controls-approved pulse meter with isolated outputs
are E-Mon D-Mon Class 2000 Three-Phase kWh or KWh/Demand
meter with the optional E-Mon D-Mon P2 Pulser output module.

Comm LED

This LED is tied to the “DIR” line of the RS-485 driver chip
(LT1785 – WM Part # ID001785). It will slightly blink on receipt
of a communications packet.

Power In Terminal Block (Labeled TB3)

Connect 24VAC and Ground from a transformer. Warning:

Observe Polarity. We recommend using a separate transformer,

but as long as the same polarity is used for 24VAC and GND on
all Satellite connections, then multiple Satellite controllers can be
powered off of a single transformer, as long as you do not exceed
the VA rating of the transformer. Use a self-fusing transformer or
use a suitable sized fuse for your transformer that accounts for the
total VA draw. The Sat 3P draws 3 VA, SAT III draws 15VA, and
the SAT 3C/D/F draws 10VA.

Power LED

This LED is tied to the +5 Volt DC power supply of the SAT 3P
controller. This LED should always be “ON” and never blink.

18-2

WCC III Technical Guide

18. SAT 3P INSTALLATION GUIDE

SA T 3P Components

Figure 18-3: SAT 3P P oints of Interest

Pulse Input Terminal Block (LABELED TB1)

This 10-position terminal block is connected to the Pulse meter(s)
output. There are eight input connections and two ground terminals
provided for ground connections. See Figure 18-5.

Output LEDs

PULSE 1 to PULSE 8 LEDs. These LEDs are not physically
connected to the actual high speed binary capture inputs. They are
software controlled outputs from the microprocessor that is on the
SAT 3P controller. This enables true output status to be displayed
of the actual pulse inputs.

STAT LEDs

There are two STAT LEDs—STAT REC and STAT XMIT.
Whenever the microprocessor transmits a communications packet,
the ST A T XMIT LED will be “ON”. Whenever the microprocessor
receives a communications packet, the STAT REC LED will be
“ON”. The ST ATUS LED blinks out a heart beat status of the SA T
3P controller.

LOCAL SET LED

This LED is normally off, but when the SAT 3P is not
communicating to the WCC III – MCD, this LED will be “ON”
solid.

Option Switches

TEST Switch—When this switch is “ON,” then the SAT 3P
will operate to any input condition that has the word “TEST”
programmed into the setpoint.

LOCAL Switch—When this switch is “ON,” then the SAT
3P operates to the LOCAL SET conditions. Also the SAT 3P
controller will operate in the LOCAL SET conditions when it has
lost communications to the rest of the WCC III communications
loop. This Local set condition should be indicated by the LOCAL
SET LED being “ON”.

L DIS Switch—When this switch is “ON,” then the SAT 3P will
not operate to the LOCAL SET conditions. It should control to
setpoints that are based on the “ON” schedule.

OPT 1, OPT 2, OPT 3 switches—These three switches are not
used at this time.

Mounting Holes

Use the three supplied sheet metal screws to mount the SAT 3P
controller in a suitable enclosure. You must use all three screws to
mount the SAT 3P controller.

WCC III Technical Guide

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