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9300 Series User’s Guide
Using the Onboard Digital Outputs
Chapter 5 - Features and Applications 
Page 123
Energy Pulsing
Five Calibration Pulser modules are preconfigured at the factory for energy 
pulsing applications. One of these modules is programmed to send kWh pulses to 
the LED on the back of the meter. The remaining four (configured for imported/
exported kWh and kVARh pulsing) can be configured to send energy pulses to any 
digital output port. Edit the appropriate Calibration Pulser or Pulser module’s Port 
setup register, and set it to the port you want to send the signal through (D1, D2, 
D3 or D4, or IR1).
LED Energy Pulsing
The LED port (L1) controls the LED on the back of the meter. This port is used for 
kWh pulsing by default; LED 1 on the back of the meter pulses every 1.8 Wh. If you 
wish to configure the LED for other energy pulsing applications (i.e. kVAh, kVARh), 
you must first disable the default kWh pulsing. Use the front panel to disable kWh 
pulsing as follows:
1.
From the S
ELECT
 S
ETUP
 menu, choose A
DV
 M
ETER
 S
ETUP
 > C
ALIBRATION
 
P
ULSER
 M
ODULES
 > 
K
W
H
 
IMP
 LED, and highlight the Port setup register and 
press the round button.
2.
From the list of available ports, select N
OT
 U
SED
.
These steps remove control of the L1 LED from the kWh IMP LED module. You 
can also disable the kWh pulsing using Designer. Select the kWh imp LED 
Calibration Pulser module and disable L1 by setting the Port setup register to 
NOT 
USED
.
Configuring Other Energy Pulsing Applications
Now that you have the L1 port free to assign a pulse to, you can assign other Pulser, 
Digital Output, or Calibration Pulser modules to it. Using the front panel, assign a 
Pulser module as follows:
1.
From S
ELECT
 S
ETUP
 choose A
DV
 M
ETER
 S
ETUP
, then select the new module type 
and the module you wish to use for pulsing the LED.
2.
Scroll down and select the Port (e.g. PU2) setup register, then choose L1.
You can also configure LED energy pulsing from Designer. Select the Digital 
Output, Pulser, or Calibration Pulser module you wish to use and set its Port setup 
register to L1.
Using the Relay Expansion Board (REB Option)
The REB option (Relay Expansion Board) allows for custom digital output 
applications using specific Grayhill relay units. The REB option provides four slots 
where you can plug Grayhill digital output hardware modules. There are nine 
Grayhill hardware modules of varying functionality available. The relays are 
purchased separately.
As with onboard digital outputs, the Pulser, Calibration Pulser, and Digital Output 
modules can be used to control the functions of the external relays. Set the 
module’s Port setup register to the digital output port (D1 to D4) that the relay is 
connected to.