HID EDGE EVO EH400-K Standard Controller Installation Guide - Manual (Page 3)

82000-921 C.0
INSTALLATION GUIDE 3 ©2009 - 2011 HID Global Corporation. All rights reserved.
Standard Networked Controller
EH400-K
Step 3 - Analyze Power Requirements
A - Door Peripheral Operational Currents
For the door peripherals identified in “Step 1 - Identify System Components” on page 2, consult the vendor data sheets
to determine the operational current draw. Typical operational current draw is provided below.
Note: See individual peripheral data sheets for actual operational current draw.
Device Conditions Typical Operational Current
Door Position Switch V
in
= 12VDC 15mA
(For example, Securitron MSS) V
in
= 24VDC 15mA
Mag Lock V
in
= 12VDC 300mA
(For example, Securitron M32) V
in
= 24VDC 150mA
REX Switch V
in
= 12VDC 28mA
(For example, Securitron EEB) V
in
= 24VDC 38mA
iCLASS Wiegand Reader V
in
= 12VDC 150mA
B - Match I/O Requirements to the Hi-O Interface Device
For the door peripherals identified in “Step 1 - Identify System Components” on page 2, the system requires direct
connection to I/O interface and Wiegand/Clock-and-Data ports of the EH400-K. A separate Hi-O Interface Device is not
required.
C - Compute and Compare Overall Current Draw
Calculate the total current draw for all door peripherals and the attached Wiegand readers with the following equation,
adding terms as required.
I
total
= I
dps
+ I
mag
+ I
rex
+ … + I
iCLASS reader
The following calculations provide load current computations.
I
total
@ 12VDC = 15mA + 300mA + 28mA + 150mA = 493mA
I
total
@ 24VDC = 15mA + 150mA + 38mA + 150mA = 353mA
Compare the required current draw (I
total
) to the output current capacity of the EH400-K (see Specification table, pg 1) to
select the Eh400-K power scheme. The CAN DC Pwr Output represents the entire power output capacity of the EH400-K.
Device Port Conditions Vout I out
Standard Networked Controller
(EH400-K)
CAN DC PWR
Output (MAX)
AUX 12-24VDC Input +10.8 to +24VDC 1.2A
PoE input +24VDC (NOM) 400mA
In this example, the EH400-K provides sufficient power when operated with a PoE injector, or +12/24VDC auxiliary power
supplies.
Directly connect the door peripherals identified in “Step 1 - Identify System Components” on page 2 to the EH400-K I/O
ports per the “Specifications” on page 1 for the selected input power scheme.
Ensure all door peripherals connected to the Strike/AUX relays and the Reader DC Pwr Output or both do not exceed
1.2Amps (AUX Input) or 0.4Amps (PoE Input), combined. Alternatively, the door peripherals may be connected to the Strike/
AUX relays configured for Dry contact up to 2Amps per relay.