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Hardware and Connectivity 52
Powering up your IOLAN
NOTES:
1. For terminal# 1 through 7, strip insulation from wire 9/32-5/16 (7 -8mm) using stranded wire size 18-12 AWG.
Tighten screw to a torque of 4.5 Lb-in (0.51Nm).
2. For terminal# E (Chassis ground), the use of ring terminal size #8 (M4) is recommended using stranded wire size
AWG 18-14. Tighten screw to a torque of 12 Lb-in (1.36 Nm).
3. When power is applied, if both sources are available, both power LED 1 and LED 2 (on front of unit) will be
luminated indicating power detected from both sources.
4. Unit is suitable for installation as part of the Common Bond Network (CBN). The LDC’s power supply input
terminals are isolated from the equipment frame ground.
TELCO - NEBS Models
The Perle IOLAN LDC TELCO-NEBS models have been certified to be NEBS compliant.
To ensure compliance, power up the IOLAN LDC model and perform the following steps:
1. Ensure that the power supply side of the connection is been powered down before attempting to
connect the wires on the IOLAN side.
2. Connect the power as outlined in the “wiring” section below.
3. Enable power to unit. Unit should now power up.
Safety warnings for TELCO - NEBS models.
Install Locations for LDC Models
The unit may be installed in one of the following locations.
z Network Telecommunications Facilities. (such as a central office).
z Locations where the NEC (National Electric Company) guidelines apply such as customer
premises, general business offices, residential and retail.
z OSP (Outside Plant) such as outside cabinets and environmental locations.
Wiring up a the Fail-Safe Relay
The LDC series of IOLAN units are also fashioned with a Fail-Safe Relay. The relay is engaged after the unit
is powered up and the software has loaded properly. Should a failure occur, the relay will be disengaged until
the unit returns to a normal state of operation. A failure is defined as a condition which causes the unit to stop
running.
6 Input 2+ Input 2+ is connected to the positive (+) input or the DC sources.
Use with partner terminal Input 2-.
7 Input 2- Input 2- is connected to the negative (-) input or the DC sources.
Use with partner terminal Input 2+.
E Chassis Ground Chassis Ground is a connection to the chassis that can be used for
earth bonding.
Note:
The TELCO - NEBS series of IOLAN units do not have a power switch, and an
appropriately rated circuit breaker must be installed externally to the unit. If two power
sources are used, each source must have a circuit breaker. As a safety precaution you
should not rely upon the unit's front panel LEDs as a power indicator.
Terminal # Description Usage