Honeywell A4021 Series Product Handbook page 9

Table 3. Connections for A4021A pre-- and post configuration with contact ratings
Terminal Abbreviations
No. No
pre
1 NO
2 RESET RESET
3 LINE
4 N
5 N
6 N
7 V2--IN V2--IN
8 V2--OUT V2--OUT
9 HD LGPS
10 ALARM ALARM
11 ALARM ALARM
12 RB
13 VENT VENT
14 IGNCTR
15 V1--IN V1--IN
16 V1--OUT V1--OUT
cos. ϕ = 0.7 for all outputs
NOTE:
Direction
post
NO input Normally Open contact of the pressure
switch (high pressure)
input Input for external reset connect with
momentary switch to line
LINE power--input Line voltage input for valve proving
system.
N power--input Neutral input for valve proving system.
N power Neutral for external devices.
N power Neutral for external devices.
input Valve--2 voltage from ignition controller
output Output connect with Valve--2
input Heat--demand input (pre--configuration)
or LGPS input (post--configuration)
input Alarm input
output Alarm output
RB input Read back signal for: heat--demand
(post-- config.) ign. contr. (pre--config.)
output Normally open valve output
HD output Heat call signal to ignition controller,
when there is a heat call and the valve
proving has taken place
input Valve--1 voltage from ignition controller
output Output connect with Valve--1
Description
8
Ratings
(220 ... 240Vac/100 ... 120Vac, (220 240Vac/100 120Vac
depending on O.S. number)
n.a.
n.a.
n.a.
n.a.
n.a.
n.a.
n.a.
4A
n.a.
4A
2A
4A
1A
4A
2A
4A
EN2R--9023 9705R0--NE