Optional 4-20Ma Analog Output Board - Honeywell HA20 Technical Manual

HA20 2-Channel Controller
Figure 3-6. Optional Discrete Relay PCB's (P/N 10-0222)
HA20 Technical Manual
K1, K2, K3, K4, K5 & K6 are
programmable, as described
in section 2.3.1

3.1.3 Optional 4-20mA Analog Output Board

(P/N 10-0223)
An optional 4-20mA analog output board, shown in Figure 3-7, may
be added. Each channel's output will transmit 4mA for 0% readings
and 20mA for 100% readings. Make certain that the mA loop output is
set to LATCHING on reading devices connected to the HA40
If the HA20 primary power is 100 – 240 VAC, 4-20mA outputs are
capable of driving 20mA through a 750 ohm load. Outputs are self
powered and DC power should not be provided by the receiving device.
Precision calibration of the 4-20mA output DAC (digital to analog
converter) is accomplished via the Diagnostics menu as described
in Section 2.3.5.
Figure 3-7. Optional 4-20mA Analog Output Board (P/N 10-0223)
3-5
TB1
Assy # 10-0308
TB1
1 2 3 4
+ - + -
CH1 CH2
4-20mA OUTPUTS