Aiphone NH-50AC User Manual
Some applications for Nurse Call systems require All Call. By including this adaptor, a station button on the master
can be used to call all of the patient stations simultaneously. An additional wire is required to each patient station.
NOTE: An NHX system installed with an NH-50AC included does not carry the UL 1069 listing.
WIRING DIAGRAM:
Trunkage Line
Connection
Terminals
0708
Nurse Call System
All Call Adaptor for NHX System
1 NH-50AC for All Call up to 49 Stations, 2 NH-50AC for up to 79 Stations
-INSTRUCTIONS -
* Patient Stations for All Call:
Model NH-1SA/AC or NH-2SA/AC.
Additional BLACK wire coming from back of
unit connects to Gray wire of trunkage cable,
and to BL terminal of NH-50AC.
Trunk #2 Patient
Stns*
Brn
Blk
Trunk #3 Patient
Stns*
Red
Brn
Red
Blk
Trunk #5
Patient Stns*
Brn
Red
Blk
Org
Yel
Grn
Blu
NHX-80X
11
12
~
21
22
~
31
32
~
41
42
~
51
52
53
54
55
56
NH-50AC
11 1B
12 1R
BL
21 2B
22 2R
BL
31 3B
32 3R
BL
41 4B
42 4R
BL
51
52
5B
A1 5R
A2 BL
P3
P4
D5
D6
Brn
Red
Gray
Brn
Red
Gray
Brn
Red
Gray
Brn
Red
Gray
Brn
Red
Gray
Org
Yel
Grn
Blu
Trunk #1
Patient Stns*
Brn
Red
Blk
NHX
Trunk #4 Patient
Stns*
Brn
Red
Blk
Jumper to
Negative of
one PS-2420UL
IMPORTANT:
Connection from CCU trunk line terminals determines which
column the All Call button will be on. (e.g. This example
shows trunk line 5, so All Call button will be on column 5 of
master station. Dip switch settings on the NH-50AC will
designate the All Call button position (1~10).
Pg. 1
PS-1225UL
+
-
+
AUX
To 2ndNH-50AC
X1
(For 50-79 station system)
Connections to 2nd NH-50AC:
X1: Control wire
A1: Audio
A2: Audio
12V+: Power
12V-: Ground
NOTES:
1. The application requires one of the station buttons to be
used for All Call.
Therefore, the standard system can have up to 49 stations,
and the expanded system can have up to 79 stations.
2. Only wiring concerning the NH-50AC is shown here. For
complete installation and wiring information, please see the
NHX Installation instructions.
To AUX input of 2
}
nd
NH-50AC
NH-50AC Front
CONTROLS AND SETTINGS:
DIP SWITCH SETTINGS:
1-2-4-8 Switches: (labelled 1, 2, 3, 4 on actual switch)
1. Set dip switches to the numerical value of the station button
HI
MID
LOW
1 2 3 4 5
VOL.
Back
ALL CALL
TRUNK
VOLUME
ALL CALL
VOLUME
ON
OFF
you are designating as the ALL CALL button. (Recommended to use 10)
2. Station numbers are 1-10 vertically on the master station.
If the All Call button is the TOP button on a column, set dip switch 1 to ON.
If the All Call button is the BOTTOM button, set switches 2 & 8 to ON.
TRUNK VOL.:
These switches adjust the output volume level of the All Call to each group of stations (trunk lines).
Adjust the switch to LOW, MID, or HI for the desired volume.
ALL CALL VOL.:
This controls the overall output volume of the All Call. Adjust to the desired level.
WIRING:
1. Follow the wiring diagram on page 1 of these instructions.
2. Connection from NHX-80X to A1, A2, P3, P4, D5, D6 terminals of the NH-50AC correspond to
which trunk line the All Call button is on. If the All Call button is on column 5 of the master,
connect as shown on the diagram. If the All Call button is on any other column on the master,
connect A1~D6 from appropriate corresponding trunk line terminals of NHX-80X.
3. The P3, P4, D5, D6 terminals act as a junction point for the common wires of the trunk line
that the All Call adaptor is on. The NH-50AC has to be wired directly from the NHX-80X, then
the patient station trunk wires go out from there.
4. Wiring from the NH-50AC to patient stations require an extra wire. Use the GRAY wire from
the Aiphone #862208 trunk cable to connect the BLACK wire of the patient stations to the BL
terminal of the NH-50AC. (Two BL terminals are paralleled internally, so either of them can be
used.)
5. The X1 terminal is only used in systems beyond 49 stations when a second NH-50AC is
required. The AUX input is only used on the second All Call adaptor. Wire the A1, A2
terminals of the first adaptor to the AUX input of the second.
1 2 4 8
1 2 3 4
OPERATION:
1. Press button on the master station that has been designated as the ALL CALL button.
2. Pick up handset and make announcement, or press and hold TALK button while speaking.
3. Hang up handset, or press OFF button when ALL CALL announcement is completed.
SPECIFICATIONS:
Power Source: 12V DC. Use PS-1225UL, one per system (powers one or two NH-50AC)
Communication: Handset or push-to-talk. All Call is transmit only.
Wiring: 16 conductors from NHX-80X to NH-50AC
1 pair from trunkage line plus one additional wire output to patient stations
5 conductors from first to second NH-50AC
Aiphone Communication Systems
1700 130th Ave. N.E.
Bellevue, WA 98005
(425) 455-0510
FAX: (425) 455-0071
Toll Free Technical Support:
1-800-692-0200
E-mail tech@aiphone.com
NH-50AC Instr
0708JDJS
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