
IP-ACM Ethernet Door Module Quick Start Guide
IP-ACM Power and Wiring Requirements
The table below describes the power and wiring requirements for the IP-ACM.
Signal Power Requirements To AWG Shield Maximum Length
RS-485 Comm, Data
Full duplex 4 wire
RM & I/O modules 22 Yes 4000ft (1212m)
RS-485 Power 12Vdc 1RM & I/O modules 22/18 Yes Range of 600ft to
1500ft. depends on
AWG2
RJ45-Ethernet Level 3 Switch, Hub,
or Host
CAT-
5E or
better
No 328ft. (100m)
Request to Exit (REX
or RTE)
Switch Contact 22/18 No 2000ft. (606m)
Door State Monitor
(DSM)
Switch Contact
Supervised Input (UL)
Note3
Input 22 Yes 2000ft. (606m)
Reader Data (Direct
Wiegand Connection)
12Vdc 4Proximity/Wiegand
signaling read head
22
20
18
Yes 200ft. (60.96m)
300ft. (91.4m)
500ft. (152.4m)
Wet Relay Contacts 12 or 24Vdc (jumper selectable), 0.5A
(per lock)5
Dry Relay Contacts 0 to 30Vdc , 5A max. NO, 3A max. NC
Power over Ethernet
(PoE)
IEEE 802.3af (PoE) and 802at (PoE Plus),
25.5W max. LLDP supported for PoE Plus6
Switch Contact 24 Yes 328 ft. (100m)
Local Power 12 or 24Vdc 32W max.7P1 18 No Dependent on
configuration
Table 4: Power and wiring requirements
1It is important to note that the aggregate load of each pair of RS-485 and Wiegand connections together must not exceed 750mA. Each set of RS-485
and Wiegand can support 750mA.
2Check wire lengths to verify that voltage drops are acceptable. Calculations are based on a single RM-4 reader with keypad and LCD (250mA). Using
22AWG, distance = 600ft. (.0165 ohms/ft.). Using 18AWG, distance = 1500ft. (.0065 ohms/ft.).
3To comply with UL requirements, use shielded, minimum 22 AWG stranded, twisted pair cable for monitor points, DSMs, and REXs. Use Belden 9462 or
equivalent.
4It is important to note that the aggregate load of each pair of RS-485 and Wiegand connections together must not exceed 750mA. Each set of RS-485
and Wiegand can support 750mA. Maximum combined output limit for readers and locks is 23W.
5Voltage depends on selection of power feed (L1 or L2). Maximum combined output limit for readers and locks is 23W.
6Compliance with IEEE 802.3 (AT or AF) specifications was not verified as part of UL294/B.
7Maximum combined output limit for readers and locks is 23W.
6