Description – Orion System OE361-13 CommLink 5 User Manual
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Form: ORION-OE391-12-ModularServiceToolSD-1B.doc
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Description
The OE391-12 Modular Service Tool SD is 
a system interface that provides a direct 
link to enable the system operator to view 
the status, configure, and adjust the 
setpoints of the following Orion controllers: 
 
 VCM-X Series Controller 
 VCM-X E-BUS Series Controller 
 RNE 
Controller
 VCB-X
Controller
 SA E-BUS Controller 
 VCM 
Controller
 VAV/CAV
Controller
 MUA II Controller 
 VAV/Zone 
Controller
 MiniLink
PD
 
The OE391-12 Modular Service Tool SD is 
housed in a black plastic enclosure. The 
display area is covered with a clear plastic 
bezel for protection of the display screen. 
The Modular Service Tool SD has a four 
line by 20 character display panel with 
adjustable contrast control and a 27 key 
membrane keypad for data selection and 
entry. All keypad operations are simple 
and straight forward, utilizing non-cryptic 
plain English language messages. Menu-
driven programming allows for easy setup 
and operation without the need for 
specialized training. The OE391-12 
Modular Service Tool SD is supplied with a 
programmable 4 Gigabyte SD memory 
card, with (4) AA 1.5 V batteries, a wall 
mount a DC power supply, a mini-Din communication cable, and an E-BUS communication cable. The mini-Din 
cable allows you to connect the Modular Service Tool to any Orion controller which has a mini-Din connector 
socket for programming, monitoring, and troubleshooting purposes. 
 
The Modular Service Tool is also equipped with an EBC E-BUS port and an RS-485 three conductor terminal 
block port. The E-BUS port and included E-BUS cable are used for updating E-BUS Module software. 
The RS-485 port is used for hard-wiring to older controllers that do not have a mini-DIN connector socket. 
 
The Modular Service Tool SD is designed to be carried by the system installer or service technician. Its rugged 
plastic housing provides superior protection for the electronic components housed inside. The Modular Service 
Tool SD is a top quality service tool that will stand up to the demands of the typical job site for many years. 
Mode
Selection
6
5
4
7
0
8
1
3
2
9
-
10.
00”
4.75”
2.02"
E-BUS
HAND
HELD PLUG
RS-485 COMM
R
SH
LD
T
SD CARD SLOT
(Push to Eject)
Technical Data
OE391-12 Modular Service Tool SD
Power
(4) AA (1.5V) Batteries
Supplied
Display
4 Line by 20 Character
Power Switch
Membrane Switch
Network Connection
RS-485
Operating Temp
10
F to 149F Protocol
HSI Open Protocol Token Passing
Operating 
Humidity 
90% RH Non-Condensing
Color
Black
Keypad
27 Key Membrane Style
Communications
RS-485 9600 or 57,600 Baud
SD Memory Card
Programmable 4 Gigabyte
Connections
RS-485 and EBC E-BUS Ports
3 Year Warranty
WattMaster reserves the right to change specifications without notice
OE391-12
Modular Service Tool SD
