STULZ E
2
SERIES CONTROLLER FOR PERIMETER SYSTEMS OPERATION MANUAL
5
The controller features called-out in Figure 3 are:
1. RJ11 telephone connector (J10) for display panel.
2. RS485 Connection for pLAN (J11).
3. Hatch for USB ports.
4. Hatch for BMS or network port.
5. Power on LED.
6. Overload LED.
7. Controller pLAN Address Display.
8. Hatch for expansion I/O module(s).
9. Power connector (J1).
2.4.3 Expansion I/O Modules
The controller's capabilities may be enhanced by the addition
of expansion I/O modules which are DIN rail mounted in the
electric box. They are typically utilized when selected optional
features are purchased. Expansion I/O modules are used
to enable additional alarms, additional blowers, air speed
monitoring or air pressure monitoring.
2.4.4 Constant Contact UPS Module
An optional Constant Contact UPS module provides short term
power for the controller should there be an interruption to, or
inconsistency with, the main power source. If main power is lost,
the Constant Contact module provides 32 VDC control power
to the controller. The controller will not have to reboot due to
a power interruption. This allows the controller to continue
monitoring sensor input signals and maintain communications
with a BMS for up to one minute. The Constant Contact module
requires no routine maintenance as there are no batteries that
need to be replaced.
CAUTION
When the power supply to the equipment has been
shut off to service the unit, be aware that the Constant
Contact UPS module in the electric box still contains
stored electric power up to 32 VDC. This voltage will
also be present in circuits that are electrically common
to the constant contact module.
2.4.5 EVD Module
An electronic expansion valve (EEV) may be used on certain
compressor based models. Control of the EEV is accomplished
with an electronic valve driver module (EVD). The EVD may be
a separate expansion module or it may be incorporated into a
GEN2 controller, depending on the I/O confi guration.
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