Bird Technologies 3129 Display - Manual (Page 32)

16
BPM-E DC Power Connections
Connect DC operating power to the BPM-E Power/Alarm 15-pin connector.
The BPM-E requires an isolated +12 to +26 VDC power supply (0.5 A max). This
power is available from the Power/Alarms connector at the rear of the 3129 Dig-
ital Display.
If your installation does not use a 3129 Digital Display, you must provide the
required power and connect it to the BPM-E Power/Alarm 15-pin connector. The
BPM-E Power/Alarm connector also provides alarm signals (TTL and relay con-
tacts), a reset line, and forward and reflected power information. See Figure 7,
page 16 for the connector pin descriptions.
Figure 7 DB-15 Power/Alarm Connector
Pin Description
1 Relay, normally closed contact (closed when relay is
not energized)
(open when there is no alarm)
2 Relay, common contact
3 Alarm output, TTL compatible
TTL High (
≥ 4.3 VDC with a 10k load) = no alarm
TTL Low (<0.2 VDC) = alarm
4 Forward monitor, 0 to 2 VDC linearly proportional to
forward power, 200 ohm output impedance
5 Reset input, TTL compatible
TTL Low (<0.5 VDC) resets alarm
6-7 No connection
8 Reflected monitor, 0 to 2 VDC linearly proportional
to reflected power, 200 ohm output impedance
9 Relay, normally open contact (open when relay is
not energized)
(closed when there is no alarm)
10-11 Reserved
12-13 DC input, +12 to +26 VDC (<0.5 A)
14-15 Ground for DC input and signals
1
15
8
9
MALE (model ACM-L2-DFDFTL-12SP only)