Input isolator   Input isolator                                                                  Input isolator card 2-wire transmitter

Name                                   card                  card           (with square root                                       2-wire transmitter      input card

(0.2 to 1.0 V    (1 to 5 V input) extraction, 1 to 5 V      input card        (with square root

input)                                               input)                                                 extraction)

Model                                 CH2*A               CH1*A                   CH5*A                     CA1*A                    CA5*A

Input signal                                       0.2 to 1.0 V DC                     1 to 5 V DC                           4 to 20 mA DC signal from 2-wire

transmitter

Input resistance                                                   1 MΩ (100 kΩ when power off)                          250 Ω                      250 Ω

Transmitter power supply                                                        –                                                               25 to 28 V DC

Leadwire resistance                                                                  –                                                RL (Ω) ≤ (20 - minimum transmitter

operating voltage) / 0.02  (*1)

Input compensation                                                 –                                 Square root                    –                      Square root

extraction (*2)                                         extraction (*2)

Output signal                                                  1 to 5 V DC, 2 outputs (output resistance: 1 Ω max. load resistance: 2 kΩ min.)

Signal isolation                                                      Between input and output signals, input signal and power supply input

Accuracy                                                                                                  Within _0.1 % of span (*3)

Square root function error                                      –                              Within _0.2 % of               –                  Within _0.2 % of

span                                                        span

Effect of ambient temperature                                                   Max. _0.2 % of span for 10 _C change

change

Effect of power supply voltage                           Max. _0.1 % of span for change of 20 to 130 V DC or 80 to 138 V AC

change

Power Consumption                              4.4 VA                4.4 VA                   5.2 VA                      5.6 VA                     6.4 VA

(100 V AC supply)

Current Consumption                           63 mA                63 mA                    88 mA                      105 mA                   130 mA

(24 V DC supply)

*1:   When used with BARD Intrinsic Safety Barrier, RL (Ω) ≤ (15.5 - minimum transmitter operating voltage) / 0.02.

*2:           0 =   E1 – 1 + 1 (E                                         0: Output voltage, E                                                           1: Input voltage)  For inputs up to 1 % of span, E    0 = E   1

*3:   The accuracy is a value for primary output.  Accuracy rating of secondary output: _0.2 % (deviation from primary output).